summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/mpu4.c
blob: ccde3f473249a2972631409ab5ee242a73eaadcf (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
/***********************************************************************************************************
  Barcrest MPU4 highly preliminary driver by J.Wallace, and Anonymous.

  This is the core driver, no video specific stuff should go in here.
  This driver holds all the mechanical games.

     05-2011: Add better OKI emulation - clock rate may be wrong but samples sound good now.
     04-2011: More accurate gamball code, fixed ROM banking (Project Amber), added BwB CHR simulator (Amber)
              This is still a hard coded system, but significantly different to Barcrest's version.
              Started adding support for the Crystal Gaming program card, and the link keys for setting parameters.
     03-2011: Lamp timing fixes, support for all known expansion cards added.
     01-2011: Adding the missing 'OKI' sound card, and documented it, but it needs a 6376 rewrite.
     09-2007: Haze: Added Deal 'Em video support.
  03-08-2007: J Wallace: Removed audio filter for now, since sound is more accurate without them.
                         Connect 4 now has the right sound.
  03-07-2007: J Wallace: Several major changes, including input relabelling, and system timer improvements.
     06-2007: Atari Ace, many cleanups and optimizations of I/O routines
  09-06-2007: J Wallace: Fixed 50Hz detection circuit.
  17-02-2007: J Wallace: Added Deal 'Em - still needs some work.
  10-02-2007: J Wallace: Improved input timing.
  30-01-2007: J Wallace: Characteriser rewritten to run the 'extra' data needed by some games.
  24-01-2007: J Wallace: With thanks to Canonman and HIGHWAYMAN/System 80, I was able to confirm a seemingly
              ghastly misuse of a PIA is actually on the real hardware. This fixes the meters.

See http://agemame.mameworld.info/techinfo/mpu4.php for Information.

--- Board Setup ---

The MPU4 BOARD is the driver board, originally designed to run Fruit Machines made by the Barcrest Group, but later
licensed to other firms as a general purpose unit (even some old Photo-Me booths used the unit).

This board uses a ~1.72 Mhz 6809B CPU, and a number of PIA6821 chips for multiplexing inputs and the like.

To some extent, the hardware feels like a revision of the MPU3 design, integrating into the base unit features that were
previously added through expansion ports. However, there is no backwards compatibility, and the entire memory map has been
reworked.

Like MPU3, a 6840PTM is used for internal timing, and other miscellaneous control functions, including as a crude analogue sound device
(a square wave from the PTM being used as the alarm sound generator). However, the main sound functionality is provided by
dedicated hardware (an AY8913).

A MPU4 GAME CARD (cartridge) plugs into the MPU4 board containing the game, and a protection PAL (the 'characteriser').
This PAL, as well as protecting the games, also controlled some of the lamp address matrix for many games, and acted as
an anti-tampering device which helped to prevent the hacking of certain titles in a manner which broke UK gaming laws.

Like MPU3, over the years developers have added more capabilities through the spare inputs and outputs provided. These provided
support for more reels, lamps and LEDs through daughtercards.
Several solutions were released depending on the manufacturer of the machine, all are emulated here.

In later revisions of the main board (MOD4 onwards), the AY8913 was removed entirely, as two official alternatives for sound had been produced.
In one, a YM2413 is built into the gameboard, and in the other an OKI MSM6376 is interfaced with a PIA and PTM to allow sophisticated
sampled sound.

The lamping and input handling side of the machine rely entirely on a column by column 'strobe' system, with lights and LEDs selected in turn.
In the inputs there are two orange connectors (sampled every 8ms) and two black ones (sampled every 16ms), giving 32 multiplexed inputs.

In addition there are two auxiliary ports that can be accessed separately to these and are bidirectional

--- Preliminary MPU4 Memorymap  ---

(NV) indicates an item which is not present on the video version, which has a Comms card instead.

   hex     |r/w| D D D D D D D D |
 location  |   | 7 6 5 4 3 2 1 0 | function
-----------+---+-----------------+--------------------------------------------------------------------------
 0000-07FF |R/W| D D D D D D D D | 2k RAM
-----------+---+-----------------+--------------------------------------------------------------------------
 0800      |R/W|                 | Characteriser (Security PAL) (NV)
-----------+---+-----------------+--------------------------------------------------------------------------
 0850 ?    | W | ??????????????? | page latch (NV)
-----------+---+-----------------+--------------------------------------------------------------------------
 0880      |R/W| D D D D D D D D | PIA6821 on soundboard (Oki MSM6376@16MHz)
           |   |                 | port A = ??
           |   |                 | port B (882)
           |   |                 |        b7 = NAR
           |   |                 |        b6 = 0 if OKI busy, 1 if OKI ready
           |   |                 |        b5 = volume control clock
           |   |                 |        b4 = volume control direction (0= up, 1 = down)
           |   |                 |        b3 = ??
           |   |                 |        b2 = ??
           |   |                 |        b1 = CH2
           |   |                 |        b0 = ST
-----------+---+-----------------+--------------------------------------------------------------------------
 08C0      |   |                 | MC6840 on sound board
-----------+---+-----------------+--------------------------------------------------------------------------
 0900-     |R/W| D D D D D D D D | MC6840 PTM IC2


  Clock1 <--------------------------------------
     |                                          |
     V                                          |
  Output1 ---> Clock2                           |
                                                |
               Output2 --+-> Clock3             |
                         |                      |
                         |   Output3 ---> 'to audio amp' ??
                         |
                         +--------> CA1 IC3 (

IRQ line connected to CPU

-----------+---+-----------------+--------------------------------------------------------------------------
 0A00-0A03 |R/W| D D D D D D D D | PIA6821 IC3 port A Lamp Drives 1,2,3,4,6,7,8,9 (sic)(IC14)
           |   |                 |
           |   |                 |          CA1 <= output2 from PTM6840 (IC2)
           |   |                 |          CA2 => alpha data
           |   |                 |
           |   |                 |          port B Lamp Drives 10,11,12,13,14,15,16,17 (sic)(IC13)
           |   |                 |
           |   |                 |          CB2 => alpha reset (clock on Dutch systems)
           |   |                 |
-----------+---+-----------------+--------------------------------------------------------------------------
 0B00-0B03 |R/W| D D D D D D D D | PIA6821 IC4 port A = data for 7seg leds (pins 10 - 17, via IC32)
           |   |                 |
           |   |                 |             CA1 INPUT, 50 Hz input (used to generate IRQ)
           |   |                 |             CA2 OUTPUT, connected to pin2 74LS138 CE for multiplexer
           |   |                 |                        (B on LED strobe multiplexer)
           |   |                 |             IRQA connected to IRQ of CPU
           |   |                 |             port B
           |   |                 |                    PB7 = INPUT, serial port Receive data (Rx)
           |   |                 |                    PB6 = INPUT, reel A sensor
           |   |                 |                    PB5 = INPUT, reel B sensor
           |   |                 |                    PB4 = INPUT, reel C sensor
           |   |                 |                    PB3 = INPUT, reel D sensor
           |   |                 |                    PB2 = INPUT, Connected to CA1 (50Hz signal)
           |   |                 |                    PB1 = INPUT, undercurrent sense
           |   |                 |                    PB0 = INPUT, overcurrent  sense
           |   |                 |
           |   |                 |             CB1 INPUT,  used to generate IRQ on edge of serial input line
           |   |                 |             CB2 OUTPUT, enable signal for reel optics
           |   |                 |             IRQB connected to IRQ of CPU
           |   |                 |
-----------+---+-----------------+--------------------------------------------------------------------------
 0C00-0C03 |R/W| D D D D D D D D | PIA6821 IC5 port A
           |   |                 |
           |   |                 |                    PA0-PA7, INPUT AUX1 connector
           |   |                 |
           |   |                 |             CA2  OUTPUT, serial port Transmit line
           |   |                 |             CA1  not connected
           |   |                 |             IRQA connected to IRQ of CPU
           |   |                 |
           |   |                 |             port B
           |   |                 |
           |   |                 |                    PB0-PB7 INPUT, AUX2 connector
           |   |                 |
           |   |                 |             CB1  INPUT,  connected to PB7 (Aux2 connector pin 4)
           |   |                 |
           |   |                 |             CB2  OUTPUT, AY8913 chip select line
           |   |                 |             IRQB connected to IRQ of CPU
           |   |                 |
-----------+---+-----------------+--------------------------------------------------------------------------
 0D00-0D03 |R/W| D D D D D D D D | PIA6821 IC6
           |   |                 |
           |   |                 |  port A
           |   |                 |
           |   |                 |        PA0 - PA7 (INPUT/OUTPUT) data port AY8913 sound chip
           |   |                 |
           |   |                 |        CA1 INPUT,  not connected
           |   |                 |        CA2 OUTPUT, BC1 pin AY8913 sound chip
           |   |                 |        IRQA , connected to IRQ CPU
           |   |                 |
           |   |                 |  port B
           |   |                 |
           |   |                 |        PB0-PB3 OUTPUT, reel A
           |   |                 |        PB4-PB7 OUTPUT, reel B
           |   |                 |
           |   |                 |        CB1 INPUT,  not connected
           |   |                 |        CB2 OUTPUT, B01R pin AY8913 sound chip
           |   |                 |        IRQB , connected to IRQ CPU
           |   |                 |
-----------+---+-----------------+--------------------------------------------------------------------------
 0E00-0E03 |R/W| D D D D D D D D | PIA6821 IC7
           |   |                 |
           |   |                 |  port A
           |   |                 |
           |   |                 |        PA0-PA3 OUTPUT, reel C
           |   |                 |        PA4-PA7 OUTPUT, reel D
           |   |                 |        CA1     INPUT,  not connected
           |   |                 |        CA2     OUTPUT, A on LED strobe multiplexer
           |   |                 |        IRQA , connected to IRQ CPU
           |   |                 |
           |   |                 |  port B
           |   |                 |
           |   |                 |        PB0-PB6 OUTPUT mech meter 1-7 or reel E + F
           |   |                 |        PB7     Voltage drop sensor
           |   |                 |        CB1     INPUT, not connected
           |   |                 |        CB2     OUTPUT,mech meter 8
           |   |                 |        IRQB , connected to IRQ CPU
           |   |                 |
-----------+---+-----------------+--------------------------------------------------------------------------
 0F00-0F03 |R/W| D D D D D D D D | PIA6821 IC8
           |   |                 |
           |   |                 | port A
           |   |                 |
           |   |                 |        PA0-PA7 INPUT  multiplexed inputs data
           |   |                 |
           |   |                 |        CA1     INPUT, not connected
           |   |                 |        CA2    OUTPUT, C on LED strobe multiplexer
           |   |                 |        IRQA           connected to IRQ CPU
           |   |                 |
           |   |                 | port B
           |   |                 |
           |   |                 |        PB0-PB7 OUTPUT  triacs outputs connector PL6
           |   |                 |        used for slides / hoppers
           |   |                 |
           |   |                 |        CB1     INPUT, not connected
           |   |                 |        CB2    OUTPUT, pin1 alpha display PL7 (clock signal)
           |   |                 |        IRQB           connected to IRQ CPU
           |   |                 |
-----------+---+-----------------+--------------------------------------------------------------------------
 1000-FFFF | R | D D D D D D D D | ROM (can be bank switched by 0x850 in 8 banks of 64 k ) (NV)
-----------+---+-----------------+--------------------------------------------------------------------------

TODO: - Distinguish door switches using manual
      - Complete stubs for hoppers (needs slightly better 68681 emulation, and new 'hoppers' device emulation)
      - It seems that the MPU4 core program relies on some degree of persistence when switching strobes and handling
      writes to the various hardware ports. This explains the occasional lamping/LED blackout and switching bugs
      For now, we're ignoring any extra writes to strobes, as the alternative is to assign a timer to *everything*
      - Flo's move in Great Escape gives spin alarms - need a different opto setting for reverse spin reels?
      - Fix BwB characteriser, need to be able to calculate stabiliser bytes. Anyone fancy reading 6809 source?
      - Fix MSM6376 - We need all features of the chip, including dynamic sample rate adjustment and BEEP.
      - OKI sound chip rate - need to confirm independently (3MHz sounds good, but that could be because
        of the old driver - BwB manual claims 64KHz to 128KHz).
***********************************************************************************************************/
#include "emu.h"
#include "machine/6821pia.h"
#include "machine/6840ptm.h"
#include "machine/nvram.h"

#include "cpu/m6809/m6809.h"
#include "sound/ay8910.h"
#include "sound/okim6376.h"
#include "sound/2413intf.h"
#include "sound/upd7759.h"
#include "machine/steppers.h"
#include "machine/roc10937.h"
#include "machine/meters.h"

#ifdef MAME_DEBUG
#define MPU4VERBOSE 1
#else
#define MPU4VERBOSE 0
#endif

#define LOG(x)	do { if (MPU4VERBOSE) logerror x; } while (0)
#define LOG_CHR(x)	do { if (MPU4VERBOSE) logerror x; } while (0)
#define LOG_CHR_FULL(x)	do { if (MPU4VERBOSE) logerror x; } while (0)
#define LOG_IC3(x)	do { if (MPU4VERBOSE) logerror x; } while (0)
#define LOG_IC8(x)	do { if (MPU4VERBOSE) logerror x; } while (0)
#define LOG_SS(x)	do { if (MPU4VERBOSE) logerror x; } while (0)

#include "video/awpvid.h"		//Fruit Machines Only
#include "connect4.lh"
#include "gamball.lh"
#include "mpu4.lh"
#include "mpu4ext.lh"
#define MPU4_MASTER_CLOCK (6880000)

static TIMER_CALLBACK( ic24_timeout );


static const UINT8 reel_mux_table[8]= {0,4,2,6,1,5,3,7};//include 7, although I don't think it's used, this is basically a wire swap
static const UINT8 reel_mux_table7[8]= {3,1,5,6,4,2,0,7};

static const UINT8 bwb_chr_table_common[10]= {0x00,0x04,0x04,0x0c,0x0c,0x1c,0x14,0x2c,0x5c,0x2c};

#define STANDARD_REEL  0	// As originally designed 3/4 reels
#define FIVE_REEL_5TO8 1	// Interfaces to meter port, allows some mechanical metering, but there is significant 'bounce' in the extra reel
#define FIVE_REEL_8TO5 2	// Mounted backwards for space reasons, but different board
#define FIVE_REEL_3TO6 3	// Connected to the centre of the meter connector, taking up meters 3 to 6
#define SIX_REEL_1TO8  4	// Two reels on the meter drives
#define SIX_REEL_5TO8  5	// Like FIVE_REEL_5TO8, but with an extra reel elsewhere
#define SEVEN_REEL     6	// Mainly club machines, significant reworking of reel hardware
#define FLUTTERBOX     7	// Will you start the fans, please!  A fan using a reel mux-like setup, but not actually a reel

#define NO_EXTENDER			0 // As originally designed
#define SMALL_CARD			1
#define LARGE_CARD_A		2 //96 Lamps
#define LARGE_CARD_B		3 //96 Lamps, 16 LEDs - as used by BwB
#define LARGE_CARD_C		4 //Identical to B, no built in LED support

#define CARD_A			1
#define CARD_B			2
#define CARD_C			3

#define TUBES				0
#define HOPPER_DUART_A		1
#define HOPPER_DUART_B		2
#define HOPPER_DUART_C		3
#define HOPPER_NONDUART_A	4
#define HOPPER_NONDUART_B	5

/* Lookup table for CHR data */

struct mpu4_chr_table
{
	UINT8 call;
	UINT8 response;
};

struct bwb_chr_table//dynamically populated table for BwB protection
{
	UINT8 response;
};

/* Video stuff - see mpu4drvr.c */
struct ef9369_t
{
	UINT32 addr;
	UINT16 clut[16];	/* 13-bits - a marking bit and a 444 color */
};

struct bt471_t
{
	UINT8 address;
	UINT8 addr_cnt;
	UINT8 pixmask;
	UINT8 command;
	rgb_t color;
};


class mpu4_state : public driver_device
{
public:
	mpu4_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) { }

	int m_mod_number;
	int m_mmtr_data;
	int m_alpha_data_line;
	int m_alpha_clock;
	int m_ay8913_address;
	int m_serial_data;
	int m_signal_50hz;
	int m_ic4_input_b;
	int m_aux1_input;
	int m_aux2_input;
	int m_IC23G1;
	int m_IC23G2A;
	int m_IC23G2B;
	int m_IC23GC;
	int m_IC23GB;
	int m_IC23GA;
	int m_prot_col;
	int m_lamp_col;
	int m_init_col;
	int m_reel_flag;
	int m_ic23_active;
	int m_led_lamp;
	int m_link7a_connected;
	emu_timer *m_ic24_timer;
	int m_expansion_latch;
	int m_global_volume;
	int m_input_strobe;
	UINT8 m_lamp_strobe;
	UINT8 m_lamp_strobe2;
	UINT8 m_led_strobe;
	UINT8 m_ay_data;
	int m_optic_pattern;
	int m_active_reel;
	int m_remote_meter;
	int m_reel_mux;
	int m_lamp_extender;
	int m_last_b7;
	int m_last_latch;
	int m_lamp_sense;
	int m_card_live;
	int m_led_extender;
	int m_bwb_bank;
	int m_chr_state;
	int m_chr_counter;
	int m_chr_value;
	int m_bwb_return;
	int m_pageval;
	int m_pageset;
	int m_hopper;
	int m_reels;
	int m_chrdata;
	const mpu4_chr_table* m_current_chr_table;
	const bwb_chr_table* m_bwb_chr_table1;
	//Video
	UINT8 m_m6840_irq_state;
	UINT8 m_m6850_irq_state;
	UINT8 m_scn2674_irq_state;
	UINT8 m_m68k_m6809_line;
	UINT8 m_m6809_m68k_line;
	UINT8 m_m68k_acia_cts;
	UINT8 m_m6809_acia_cts;
	UINT8 m_m6809_acia_rts;
	UINT8 m_m6809_acia_dcd;
	int m_gfx_index;
	UINT16 * m_vid_vidram;
	UINT16 * m_vid_mainram;
	UINT8 m_scn2674_IR[16];
	UINT8 m_scn2675_IR_pointer;
	UINT8 m_scn2674_screen1_l;
	UINT8 m_scn2674_screen1_h;
	UINT8 m_scn2674_cursor_l;
	UINT8 m_scn2674_cursor_h;
	UINT8 m_scn2674_screen2_l;
	UINT8 m_scn2674_screen2_h;
	UINT8 m_scn2674_irq_register;
	UINT8 m_scn2674_status_register;
	UINT8 m_scn2674_irq_mask;
	UINT8 m_scn2674_gfx_enabled;
	UINT8 m_scn2674_display_enabled;
	UINT8 m_scn2674_cursor_enabled;
	UINT8 m_IR0_scn2674_double_ht_wd;
	UINT8 m_IR0_scn2674_scanline_per_char_row;
	UINT8 m_IR0_scn2674_sync_select;
	UINT8 m_IR0_scn2674_buffer_mode_select;
	UINT8 m_IR1_scn2674_interlace_enable;
	UINT8 m_IR1_scn2674_equalizing_constant;
	UINT8 m_IR2_scn2674_row_table;
	UINT8 m_IR2_scn2674_horz_sync_width;
	UINT8 m_IR2_scn2674_horz_back_porch;
	UINT8 m_IR3_scn2674_vert_front_porch;
	UINT8 m_IR3_scn2674_vert_back_porch;
	UINT8 m_IR4_scn2674_rows_per_screen;
	UINT8 m_IR4_scn2674_character_blink_rate;
	UINT8 m_IR5_scn2674_character_per_row;
	UINT8 m_IR8_scn2674_display_buffer_first_address_LSB;
	UINT8 m_IR9_scn2674_display_buffer_first_address_MSB;
	UINT8 m_IR9_scn2674_display_buffer_last_address;
	UINT8 m_IR10_scn2674_display_pointer_address_lower;
	UINT8 m_IR11_scn2674_display_pointer_address_upper;
	UINT8 m_IR12_scn2674_scroll_start;
	UINT8 m_IR12_scn2674_split_register_1;
	UINT8 m_IR13_scn2674_scroll_end;
	UINT8 m_IR13_scn2674_split_register_2;
	INT8 m_cur[2];
	UINT8 *m_dealem_videoram;
	int m_rowcounter;
	int m_linecounter;
	struct ef9369_t m_pal;
	struct bt471_t m_bt471;
};

/*
LED Segments related to pins (5 is not connected):
Unlike the controllers emulated in the layout code, each
segment of an MPU4 LED can be set individually, even
being used as individual lamps. However, we can get away
with settings like this in the majority of cases.
   _9_
  |   |
  3   8
  |   |
   _2_
  |   |
  4   7
  |_ _|
    6  1

8 display enables (pins 10 - 17)
*/

static void lamp_extend_small(int data)
{
	int lamp_strobe_ext,column,i;
	column = data & 0x07;

	lamp_strobe_ext = 0x1f - ((data & 0xf8) >> 3);
	if ( lamp_strobe_ext )
	{
		for (i = 0; i < 5; i++)
		{
			output_set_lamp_value((5*column)+i+128,((lamp_strobe_ext  & (1 << i)) != 0));
		}
    }
}

static void lamp_extend_largea(mpu4_state *state, int data,int column,int active)
{
	int lampbase,i,byte7;

	state->m_lamp_sense = 0;
	byte7 = data & 0x80;
	if ( byte7 != state->m_last_b7 )
	{
		if ( byte7 )
		{
			lampbase = 128 + column * 8;
		}
		else
		{
			lampbase = 192 + column * 8;
		}
		if ( data & 0x3f )
		{
			state->m_lamp_sense = 1;
		}
		if ( active )
		{
			for (i = 0; i < 6; i++)
			{
				output_set_lamp_value(lampbase+i,(data  & (1 << i)) != 0);
			}
		}
    }
    state->m_last_b7 = byte7;
}

static void lamp_extend_largebc(mpu4_state *state, int data,int column,int active)
{
	int lampbase,i,byte7;

	state->m_lamp_sense = 0;
	byte7 = data & 0x80;
	if ( byte7 != state->m_last_b7 )
	{
		state->m_card_live = 1;
		if ( byte7 )
		{
			lampbase = 128 + column * 8;
		}
		else
		{
			lampbase = 192 + column * 8;
		}
		if ( data & 0x3f )
		{
			state->m_lamp_sense = 1;
		}
		if ( active )
		{
			for (i = 0; i < 6; i++)
			{
				output_set_lamp_value(lampbase+i,(data  & (1 << i)) != 0);
			}
		}
		state->m_last_b7 = byte7;
	}
	else
	{
		state->m_card_live = 0;
	}
}

static void led_write_latch(mpu4_state *state, int latch, int data, int column)
{
	int diff,i;

	diff = (latch ^ state->m_last_latch) & latch;
	column = 7 - column; // like main board, these are wired up in reverse
	data = ~data;//inverted?

	for(i=0; i<5; i++)
	{
		if (diff & (1<<i))
		{
			column += (i*8);
		}
	}
	output_set_digit_value(column, data);

	state->m_last_latch = diff;
}


static void update_meters(mpu4_state *state)
{
	int meter;
	int data = ((state->m_mmtr_data & 0x7f) | state->m_remote_meter);
	switch (state->m_reel_mux)
	{
		case STANDARD_REEL:
		// Change nothing
		break;
		case FIVE_REEL_5TO8:
		stepper_update(4, ((data >> 4) & 0x0f));
		data = (data & 0x0F); //Strip reel data from meter drives, leaving active elements
		awp_draw_reel(4);
		break;
		case FIVE_REEL_8TO5:
		stepper_update(4, (((data & 0x01) + ((data & 0x08) >> 2) + ((data & 0x20) >> 3) + ((data & 0x80) >> 4)) & 0x0f)) ;
		data = 0x00; //Strip all reel data from meter drives, nothing is connected
		awp_draw_reel(4);
		break;
		case FIVE_REEL_3TO6:
		stepper_update(4, ((data >> 2) & 0x0f));
		data = 0x00; //Strip all reel data from meter drives
		awp_draw_reel(4);
		break;
		case SIX_REEL_1TO8:
		stepper_update(4, (data & 0x0f));
		stepper_update(5, ((data >> 4) & 0x0f));
		data = 0x00; //Strip all reel data from meter drives
		awp_draw_reel(4);
		awp_draw_reel(5);
		break;
		case SIX_REEL_5TO8:
		stepper_update(4, ((data >> 4) & 0x0f));
		data = 0x00; //Strip all reel data from meter drives
		awp_draw_reel(4);
		break;
		case SEVEN_REEL:
		stepper_update(0, (((data & 0x01) + ((data & 0x08) >> 2) + ((data & 0x20) >> 3) + ((data & 0x80) >> 4)) & 0x0f)) ;
		data = 0x00; //Strip all reel data from meter drives
		awp_draw_reel(0);
		break;
		case FLUTTERBOX: //The backbox fan assembly fits in a reel unit sized box, wired to the remote meter pin, so we can handle it here
		output_set_value("flutterbox", data & 0x80);
		data &= ~0x80; //Strip flutterbox data from meter drives
	}

	MechMtr_update(7, (data & 0x80));
	for (meter = 0; meter < 4; meter ++)
	{
		MechMtr_update(meter, (data & (1 << meter)));
	}
	if (state->m_reel_mux == STANDARD_REEL)
	{
		for (meter = 4; meter < 7; meter ++)
		{
			MechMtr_update(meter, (data & (1 << meter)));
		}
	}
}

/* called if board is reset */
static void mpu4_stepper_reset(mpu4_state *state)
{
	int pattern = 0,reel;
	for (reel = 0; reel < 6; reel++)
	{
		stepper_reset_position(reel);
		if(!state->m_reel_mux)
		{
			if (stepper_optic_state(reel)) pattern |= 1<<reel;
		}
	}
	state->m_optic_pattern = pattern;
}


static MACHINE_RESET( mpu4 )
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	ROC10937_reset(0);	/* reset display1 */

	mpu4_stepper_reset(state);

	state->m_lamp_strobe    = 0;
	state->m_lamp_strobe2   = 0;
	state->m_led_strobe     = 0;

	state->m_IC23GC    = 0;
	state->m_IC23GB    = 0;
	state->m_IC23GA    = 0;
	state->m_IC23G1    = 1;
	state->m_IC23G2A   = 0;
	state->m_IC23G2B   = 0;

	state->m_prot_col  = 0;
	state->m_chr_counter    = 0;
	state->m_chr_value		= 0;

	/* init rom bank, some games don't set this, and will assume bank 0,set 0 */
	{
		UINT8 *rom = machine.region("maincpu")->base();

		memory_configure_bank(machine, "bank1", 0, 8, &rom[0x01000], 0x10000);

		memory_set_bank(machine, "bank1",0);
		machine.device("maincpu")->reset();
	}
}


/* 6809 IRQ handler */
static WRITE_LINE_DEVICE_HANDLER( cpu0_irq )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	pia6821_device *pia3 = device->machine().device<pia6821_device>("pia_ic3");
	pia6821_device *pia4 = device->machine().device<pia6821_device>("pia_ic4");
	pia6821_device *pia5 = device->machine().device<pia6821_device>("pia_ic5");
	pia6821_device *pia6 = device->machine().device<pia6821_device>("pia_ic6");
	pia6821_device *pia7 = device->machine().device<pia6821_device>("pia_ic7");
	pia6821_device *pia8 = device->machine().device<pia6821_device>("pia_ic8");
	ptm6840_device *ptm2 = device->machine().device<ptm6840_device>("ptm_ic2");

	/* The PIA and PTM IRQ lines are all connected to a common PCB track, leading directly to the 6809 IRQ line. */
	int combined_state = pia3->irq_a_state() | pia3->irq_b_state() |
						 pia4->irq_a_state() | pia4->irq_b_state() |
						 pia5->irq_a_state() | pia5->irq_b_state() |
						 pia6->irq_a_state() | pia6->irq_b_state() |
						 pia7->irq_a_state() | pia7->irq_b_state() |
						 pia8->irq_a_state() | pia8->irq_b_state() |
						 ptm2->irq_state();

	if (!drvstate->m_link7a_connected) //7B = IRQ, 7A = FIRQ, both = NMI
	{
		cputag_set_input_line(device->machine(), "maincpu", M6809_IRQ_LINE, combined_state ? ASSERT_LINE : CLEAR_LINE);
		LOG(("6809 int%d \n", combined_state));
	}
	else
	{
		cputag_set_input_line(device->machine(), "maincpu", M6809_FIRQ_LINE, combined_state ? ASSERT_LINE : CLEAR_LINE);
		LOG(("6809 fint%d \n", combined_state));
	}
}

/* Bankswitching
The MOD 4 ROM cards are set up to handle 8 separate ROM pages, arranged as 2 sets of 4.
The bankswitch selects which of the 4 pages in the set is active, while the bankset
switches between the sets.
It appears that the cards were originally intended to be used in a 'half' page setup,
where the two halves of the ROM space could be mixed and matched as appropriate.
However, there is no evidence to suggest this was ever implemented.
The controls for it exist however, in the form of the Soundboard PIA CB2 pin, which is
used in some cabinets instead of the main control.
*/
static WRITE8_HANDLER( bankswitch_w )
{
	mpu4_state *state = space->machine().driver_data<mpu4_state>();
	state->m_pageval=(data&0x03);
	memory_set_bank(space->machine(), "bank1",state->m_pageval + (state->m_pageset?4:0));
}


static READ8_HANDLER( bankswitch_r )
{
	return memory_get_bank(space->machine(), "bank1");
}


static WRITE8_HANDLER( bankset_w )
{
	mpu4_state *state = space->machine().driver_data<mpu4_state>();
	state->m_pageval=(data - 2);//writes 2 and 3, to represent 0 and 1 - a hangover from the half page design?
	memory_set_bank(space->machine(), "bank1",state->m_pageval + (state->m_pageset?4:0));
}


/* IC2 6840 PTM handler */
static WRITE8_DEVICE_HANDLER( ic2_o1_callback )
{
	downcast<ptm6840_device *>(device)->set_c2(data);

	/* copy output value to IC2 c2
    this output is the clock for timer2 */
	/* 1200Hz System interrupt timer */
}


static WRITE8_DEVICE_HANDLER( ic2_o2_callback )
{
	pia6821_device *pia = device->machine().device<pia6821_device>("pia_ic3");
	pia->ca1_w(data); /* copy output value to IC3 ca1 */
	/* the output from timer2 is the input clock for timer3 */
	/* miscellaneous interrupts generated here */
	downcast<ptm6840_device *>(device)->set_c3(data);
}


static WRITE8_DEVICE_HANDLER( ic2_o3_callback )
{
	/* the output from timer3 is used as a square wave for the alarm output
    and as an external clock source for timer 1! */
	/* also runs lamp fade */
	downcast<ptm6840_device *>(device)->set_c1(data);
}


static const ptm6840_interface ptm_ic2_intf =
{
	MPU4_MASTER_CLOCK / 4,
	{ 0, 0, 0 },
	{ DEVCB_HANDLER(ic2_o1_callback),
	  DEVCB_HANDLER(ic2_o2_callback),
	  DEVCB_HANDLER(ic2_o3_callback) },
	DEVCB_LINE(cpu0_irq)
};


/* 6821 PIA handlers */
/* IC3, lamp data lines + alpha numeric display */
static WRITE8_DEVICE_HANDLER( pia_ic3_porta_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	int i;
	LOG_IC3(("%s: IC3 PIA Port A Set to %2x (lamp strobes 1 - 9)\n", device->machine().describe_context(),data));

	if(state->m_ic23_active)
	{
		if (state->m_lamp_strobe != state->m_input_strobe)
		{
			// Because of the nature of the lamping circuit, there is an element of persistance
			// As a consequence, the lamp column data can change before the input strobe without
			// causing the relevant lamps to black out.

			for (i = 0; i < 8; i++)
			{
				output_set_lamp_value((8*state->m_input_strobe)+i, ((data  & (1 << i)) !=0));
			}
			state->m_lamp_strobe = state->m_input_strobe;
		}
	}
}

static WRITE8_DEVICE_HANDLER( pia_ic3_portb_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	int i;
	LOG_IC3(("%s: IC3 PIA Port B Set to %2x  (lamp strobes 10 - 17)\n", device->machine().describe_context(),data));

	if(state->m_ic23_active)
	{
		if (state->m_lamp_strobe2 != state->m_input_strobe)
		{
			for (i = 0; i < 8; i++)
			{
				output_set_lamp_value((8*state->m_input_strobe)+i+64, ((data  & (1 << i)) !=0));
			}
			state->m_lamp_strobe2 = state->m_input_strobe;
		}

		if (state->m_led_lamp)
		{
			/* Some games (like Connect 4) use 'programmable' LED displays, built from light display lines in section 2. */
			/* These are mostly low-tech machines, where such wiring proved cheaper than an extender card */
			UINT8 pled_segs[2] = {0,0};

			static const int lamps1[8] = { 106, 107, 108, 109, 104, 105, 110, 133 };
			static const int lamps2[8] = { 114, 115, 116, 117, 112, 113, 118, 119 };

			for (i = 0; i < 8; i++)
			{
				if (output_get_lamp_value(lamps1[i])) pled_segs[0] |= (1 << i);
				if (output_get_lamp_value(lamps2[i])) pled_segs[1] |= (1 << i);
			}

			output_set_digit_value(8,pled_segs[0]);
			output_set_digit_value(9,pled_segs[1]);
		}
	}
}

static WRITE_LINE_DEVICE_HANDLER( pia_ic3_ca2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG_IC3(("%s: IC3 PIA Write CA2 (alpha data), %02X\n", device->machine().describe_context(),state));

	drvstate->m_alpha_data_line = state;
}


static WRITE_LINE_DEVICE_HANDLER( pia_ic3_cb2_w )
{
	LOG_IC3(("%s: IC3 PIA Write CB (alpha reset), %02X\n",device->machine().describe_context(),state));
// DM Data pin A
	if ( !state )
	{
		ROC10937_reset(0);
	}
}


static const pia6821_interface pia_ic3_intf =
{
	DEVCB_NULL,		/* port A in */
	DEVCB_NULL,		/* port B in */
	DEVCB_NULL,		/* line CA1 in */
	DEVCB_NULL,		/* line CB1 in */
	DEVCB_NULL,		/* line CA2 in */
	DEVCB_NULL,		/* line CB2 in */
	DEVCB_HANDLER(pia_ic3_porta_w),		/* port A out */
	DEVCB_HANDLER(pia_ic3_portb_w),		/* port B out */
	DEVCB_LINE(pia_ic3_ca2_w),			/* line CA2 out */
	DEVCB_LINE(pia_ic3_cb2_w),			/* port CB2 out */
	DEVCB_LINE(cpu0_irq),				/* IRQA */
	DEVCB_LINE(cpu0_irq)				/* IRQB */
};


/*
IC23 emulation

IC23 is a 74LS138 1-of-8 Decoder

It is used as a multiplexer for the LEDs, lamp selects and inputs.*/

static void ic23_update(mpu4_state *state)
{
	if (!state->m_IC23G2A)
	{
		if (!state->m_IC23G2B)
		{
			if (state->m_IC23G1)
			{
				if ( state->m_IC23GA ) state->m_input_strobe |= 0x01;
				else				 state->m_input_strobe &= ~0x01;

				if ( state->m_IC23GB ) state->m_input_strobe |= 0x02;
				else		         state->m_input_strobe &= ~0x02;

				if ( state->m_IC23GC ) state->m_input_strobe |= 0x04;
				else				 state->m_input_strobe &= ~0x04;
			}
		}
	}
	else
	if ((state->m_IC23G2A)||(state->m_IC23G2B))
	{
		state->m_input_strobe = 0x00;
	}
}


/*
IC24 emulation

IC24 is a 74LS122 pulse generator

CLEAR and B2 are tied high and A1 and A2 tied low, meaning any pulse
on B1 will give a low pulse on the output pin.
*/
static void ic24_output(mpu4_state *state, int data)
{
	state->m_IC23G2A = data;
	ic23_update(state);
}


static void ic24_setup(mpu4_state *state)
{
	if (state->m_IC23GA)
	{
		double duration = TIME_OF_74LS123((220*1000),(0.1*0.000001));
		{
			state->m_ic23_active=1;
			ic24_output(state, 0);
			state->m_ic24_timer->adjust(attotime::from_double(duration));
		}
	}
}


static TIMER_CALLBACK( ic24_timeout )
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_ic23_active=0;
	ic24_output(state, 1);
}


/* IC4, 7 seg leds, 50Hz timer reel sensors, current sensors */
static WRITE8_DEVICE_HANDLER( pia_ic4_porta_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	if(state->m_ic23_active)
	{
		if (((state->m_lamp_extender == NO_EXTENDER)||(state->m_lamp_extender == SMALL_CARD)||(state->m_lamp_extender == LARGE_CARD_C))&& (state->m_led_extender == NO_EXTENDER))
		{
			if(state->m_led_strobe != state->m_input_strobe)
			{
				output_set_digit_value(7 - state->m_input_strobe,data);
			}
			state->m_led_strobe = state->m_input_strobe;
		}
	}
}

static WRITE8_DEVICE_HANDLER( pia_ic4_portb_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	if (state->m_reel_mux)
	{
		/* A write here connects one reel (and only one)
        to the optic test circuit. This allows 8 reels
        to be supported instead of 4. */
		if (state->m_reel_mux == SEVEN_REEL)
		{
			state->m_active_reel= reel_mux_table7[(data >> 4) & 0x07];
		}
		else
		state->m_active_reel= reel_mux_table[(data >> 4) & 0x07];
	}
}

static READ8_DEVICE_HANDLER( pia_ic4_portb_r )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	pia6821_device *pia = downcast<pia6821_device *>(device);
	if ( state->m_serial_data )
	{
		state->m_ic4_input_b |=  0x80;
		pia->cb1_w(1);
	}
	else
	{
		state->m_ic4_input_b &= ~0x80;
		pia->cb1_w(0);
	}

	if (!state->m_reel_mux)
	{
		if ( state->m_optic_pattern & 0x01 ) state->m_ic4_input_b |=  0x40; /* reel A tab */
		else							   state->m_ic4_input_b &= ~0x40;

		if ( state->m_optic_pattern & 0x02 ) state->m_ic4_input_b |=  0x20; /* reel B tab */
		else							   state->m_ic4_input_b &= ~0x20;

		if ( state->m_optic_pattern & 0x04 ) state->m_ic4_input_b |=  0x10; /* reel C tab */
		else							   state->m_ic4_input_b &= ~0x10;

		if ( state->m_optic_pattern & 0x08 ) state->m_ic4_input_b |=  0x08; /* reel D tab */
		else							   state->m_ic4_input_b &= ~0x08;

	}
	else
	{
		if (stepper_optic_state(state->m_active_reel))
		{
			state->m_ic4_input_b |=  0x08;
		}
		else
		{
			state->m_ic4_input_b &= ~0x08;
		}
	}
	if ( state->m_signal_50hz )			state->m_ic4_input_b |=  0x04; /* 50 Hz */
	else								state->m_ic4_input_b &= ~0x04;

	if (state->m_ic4_input_b & 0x02)
	{
		state->m_ic4_input_b &= ~0x02;
	}
	else
	{
		state->m_ic4_input_b |= 0x02; //Pulse the overcurrent line with every read to show the CPU each lamp has lit
	}
	#ifdef UNUSED_FUNCTION
	if ( lamp_undercurrent ) state->m_ic4_input_b |= 0x01;
	#endif

	LOG_IC3(("%s: IC4 PIA Read of Port B %x\n",device->machine().describe_context(),state->m_ic4_input_b));
	return state->m_ic4_input_b;
}


static WRITE_LINE_DEVICE_HANDLER( pia_ic4_ca2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG_IC3(("%s: IC4 PIA Write CA (input MUX strobe /LED B), %02X\n", device->machine().describe_context(),state));

	drvstate->m_IC23GB = state;
	ic23_update(drvstate);
}

static WRITE_LINE_DEVICE_HANDLER( pia_ic4_cb2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG_IC3(("%s: IC4 PIA Write CA (input MUX strobe /LED B), %02X\n", device->machine().describe_context(),state));
	drvstate->m_reel_flag=state;
}
static const pia6821_interface pia_ic4_intf =
{
	DEVCB_NULL,		/* port A in */
	DEVCB_HANDLER(pia_ic4_portb_r),	/* port B in */
	DEVCB_NULL,		/* line CA1 in */
	DEVCB_NULL,		/* line CB1 in */
	DEVCB_NULL,		/* line CA2 in */
	DEVCB_NULL,		/* line CB2 in */
	DEVCB_HANDLER(pia_ic4_porta_w),		/* port A out */
	DEVCB_HANDLER(pia_ic4_portb_w),		/* port B out */
	DEVCB_LINE(pia_ic4_ca2_w),		/* line CA2 out */
	DEVCB_LINE(pia_ic4_cb2_w),		/* line CB2 out */
	DEVCB_LINE(cpu0_irq),		/* IRQA */
	DEVCB_LINE(cpu0_irq)		/* IRQB */
};

/* IC5, AUX ports, coin lockouts and AY sound chip select (MODs below 4 only) */
static READ8_DEVICE_HANDLER( pia_ic5_porta_r )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	if (state->m_lamp_extender == LARGE_CARD_A)
	{
		if (state->m_lamp_sense && state->m_ic23_active)
		{
			state->m_aux1_input |= 0x40;
		}
		else
		{
			state->m_aux1_input &= ~0x40; //Pulse the overcurrent line with every read to show the CPU each lamp has lit
		}
	}
	if (state->m_hopper == HOPPER_NONDUART_A)
	{
/*      if (hopper1_active)
        {
            state->m_aux1_input |= 0x04;
        }
        else
        {
            state->m_aux1_input &= ~0x04;
        }*/
	}
	LOG(("%s: IC5 PIA Read of Port A (AUX1)\n",device->machine().describe_context()));

	return input_port_read(device->machine(), "AUX1")|state->m_aux1_input;
}

static WRITE8_DEVICE_HANDLER( pia_ic5_porta_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	pia6821_device *pia_ic4 = device->machine().device<pia6821_device>("pia_ic4");
	if (state->m_hopper == HOPPER_NONDUART_A)
	{
		//hopper1_drive_sensor(data&0x10);
	}
	switch (state->m_lamp_extender)
	{
		case NO_EXTENDER:
		if (state->m_led_extender == CARD_B)
		{
			led_write_latch(state, data & 0x1f, pia_ic4->a_output(),state->m_input_strobe);
		}
		else if ((state->m_led_extender != CARD_A)||(state->m_led_extender != NO_EXTENDER))
		{
			output_set_digit_value((state->m_input_strobe+8),data);
		}
		break;
		case SMALL_CARD:
		if(state->m_ic23_active)
		{
			lamp_extend_small(data);
		}
		break;
		case LARGE_CARD_A:
		lamp_extend_largea(state,data,state->m_input_strobe,state->m_ic23_active);
		break;
		case LARGE_CARD_B:
		lamp_extend_largebc(state,data,state->m_input_strobe,state->m_ic23_active);
		if ((state->m_ic23_active) && state->m_card_live)
		{
			output_set_digit_value(((8*(state->m_last_b7 >>7))+state->m_input_strobe),~data);
		}
		break;
		case LARGE_CARD_C:
		lamp_extend_largebc(state,data,state->m_input_strobe,state->m_ic23_active);
		break;
	}
	if (state->m_reel_mux == SIX_REEL_5TO8)
	{
		stepper_update(4, data&0x0F);
		stepper_update(5, (data >> 4)&0x0F);
		awp_draw_reel(4);
		awp_draw_reel(5);
	}
	else
	if (state->m_reel_mux == SEVEN_REEL)
	{
		stepper_update(1, data&0x0F);
		stepper_update(2, (data >> 4)&0x0F);
		awp_draw_reel(1);
		awp_draw_reel(2);
	}

		if (mame_stricmp(device->machine().system().name, "m_gmball") == 0)
		{
		/* The 'Gamball' device is a unique piece of mechanical equipment, designed to
        provide a truly fair hi-lo gamble for an AWP machine. Functionally, it consists of
        a ping-pong ball or similar enclosed in the machine's backbox, on a platform with 12
        holes. When the low 4 bytes of AUX1 are triggered, this fires the ball out from the
        hole it's currently in, to land in another. Landing in the same hole causes the machine to
        refire the ball. The ball detection is done by the high 4 bytes of AUX1.
        Here we call the MAME RNG, once to pick a row, once to pick from the four pockets within it. We
        then trigger the switches corresponding to the correct number. This appears to be the best way
        of making the game fair, short of simulating the physics of a bouncing ball ;)*/
		if (data & 0x0f)
		{
			switch (device->machine().rand() & 0x2)
			{
				case 0x00: //Top row
				{
					switch (device->machine().rand() & 0x3)
					{
						case 0x00: //7
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0xa0;
						break;
						case 0x01://4
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0xb0;
						break;
						case 0x02://9
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0xc0;
						break;
						case 0x03://8
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0xd0;
						break;
					}
				}
				case 0x01: //Middle row - note switches don't match pattern
				{
					switch (device->machine().rand() & 0x3)
					{
						case 0x00://12
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x40;
						break;
						case 0x01://1
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x50;
						break;
						case 0x02://11
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x80;
						break;
						case 0x03://2
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x90;
						break;
					}
				}
				case 0x02: //Bottom row
				{
					switch (device->machine().rand() & 0x3)
					{
						case 0x00://5
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x00;
						break;
						case 0x01://10
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x10;
						break;
						case 0x02://3
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x20;
						break;
						case 0x03://6
						state->m_aux1_input = (state->m_aux1_input & 0x0f);
						state->m_aux1_input|= 0x30;
						break;
					}
				}
			}
		}
	}
}

static WRITE8_DEVICE_HANDLER( pia_ic5_portb_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	if (state->m_hopper == HOPPER_NONDUART_B)
	{
		//hopper1_drive_motor(data &0x01)
		//hopper1_drive_sensor(data &0x08)
	}
	if (state->m_led_extender == CARD_A)
	{
		// led_write_latch(state, data & 0x07, pia_get_output_a(pia_ic4),state->m_input_strobe)
	}

}
static READ8_DEVICE_HANDLER( pia_ic5_portb_r )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	pia6821_device *pia_ic5 = device->machine().device<pia6821_device>("pia_ic5");
	if (state->m_hopper == HOPPER_NONDUART_B)
	{/*
        if (hopper1_active)
        {
            state->m_aux2_input |= 0x08;
        }
        else
        {
            state->m_aux2_input &= ~0x08;
        }*/
	}

	LOG(("%s: IC5 PIA Read of Port B (coin input AUX2)\n",device->machine().describe_context()));
	coin_lockout_w(device->machine(), 0, (pia_ic5->b_output() & 0x01) );
	coin_lockout_w(device->machine(), 1, (pia_ic5->b_output() & 0x02) );
	coin_lockout_w(device->machine(), 2, (pia_ic5->b_output() & 0x04) );
	coin_lockout_w(device->machine(), 3, (pia_ic5->b_output() & 0x08) );
	return input_port_read(device->machine(), "AUX2") | state->m_aux2_input;
}


static WRITE_LINE_DEVICE_HANDLER( pia_ic5_ca2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG(("%s: IC5 PIA Write CA2 (Serial Tx) %2x\n",device->machine().describe_context(),state));
	drvstate->m_serial_data = state;
}


/* ---------------------------------------
   AY Chip sound function selection -
   ---------------------------------------
The databus of the AY sound chip is connected to IC6 Port A.
Data is read from/written to the AY chip through this port.

If this sounds familiar, Amstrad did something very similar with their home computers.

The PSG function, defined by the BC1,BC2 and BDIR signals, is controlled by CA2 and CB2 of IC6.

PSG function selection:
-----------------------
BDIR = IC6 CB2 and BC1 = IC6 CA2

Pin            | PSG Function
BDIR BC1       |
0    0         | Inactive
0    1         | Read from selected PSG register. When function is set, the PSG will make the register data available to Port A.
1    0         | Write to selected PSG register. When set, the PSG will take the data at Port A and write it into the selected PSG register.
1    1         | Select PSG register. When set, the PSG will take the data at Port A and select a register.
*/

/* PSG function selected */
static void update_ay(device_t *device)
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	pia6821_device *pia = downcast<pia6821_device *>(device);
	if (!pia->cb2_output())
	{
		switch (state->m_ay8913_address)
		{
			case 0x00:
			{
				/* Inactive */
				break;
			}
			case 0x01:
			{	/* CA2 = 1 CB2 = 0? : Read from selected PSG register and make the register data available to Port A */
				pia6821_device *pia_ic6 = device->machine().device<pia6821_device>("pia_ic6");
				LOG(("AY8913 address = %d \n",pia_ic6->a_output()&0x0f));
				break;
			}
			case 0x02:
			{/* CA2 = 0 CB2 = 1? : Write to selected PSG register and write data to Port A */
				pia6821_device *pia_ic6 = device->machine().device<pia6821_device>("pia_ic6");
				device_t *ay = device->machine().device("ay8913");
				ay8910_data_w(ay, 0, pia_ic6->a_output());
				LOG(("AY Chip Write \n"));
				break;
			}
			case 0x03:
			{/* CA2 = 1 CB2 = 1? : The register will now be selected and the user can read from or write to it.
             The register will remain selected until another is chosen.*/
				pia6821_device *pia_ic6 = device->machine().device<pia6821_device>("pia_ic6");
				device_t *ay = device->machine().device("ay8913");
				ay8910_address_w(ay, 0, pia_ic6->a_output());
				LOG(("AY Chip Select \n"));
				break;
			}
			default:
			{
				LOG(("AY Chip error \n"));
			}
		}
	}
}


static WRITE_LINE_DEVICE_HANDLER( pia_ic5_cb2_w )
{
    update_ay(device);
}


static const pia6821_interface pia_ic5_intf =
{
	DEVCB_HANDLER(pia_ic5_porta_r),		/* port A in */
	DEVCB_HANDLER(pia_ic5_portb_r),	/* port B in */
	DEVCB_NULL,		/* line CA1 in */
	DEVCB_NULL,		/* line CB1 in */
	DEVCB_NULL,		/* line CA2 in */
	DEVCB_NULL,		/* line CB2 in */
	DEVCB_HANDLER(pia_ic5_porta_w),		/* port A out */
	DEVCB_HANDLER(pia_ic5_portb_w),		/* port B out */
	DEVCB_LINE(pia_ic5_ca2_w),		/* line CA2 out */
	DEVCB_LINE(pia_ic5_cb2_w),		/* port CB2 out */
	DEVCB_LINE(cpu0_irq),			/* IRQA */
	DEVCB_LINE(cpu0_irq)			/* IRQB */
};


/* IC6, Reel A and B and AY registers (MODs below 4 only) */
static WRITE8_DEVICE_HANDLER( pia_ic6_portb_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	LOG(("%s: IC6 PIA Port B Set to %2x (Reel A and B)\n", device->machine().describe_context(),data));

	if (state->m_reel_mux == SEVEN_REEL)
	{
		stepper_update(3, data&0x0F);
		stepper_update(4, (data >> 4)&0x0F);
		awp_draw_reel(3);
		awp_draw_reel(4);
	}
	else if (state->m_reels)
	{
		stepper_update(0, data & 0x0F );
		stepper_update(1, (data>>4) & 0x0F );
		awp_draw_reel(0);
		awp_draw_reel(1);
	}

	if (state->m_reel_flag && (state->m_reel_mux == STANDARD_REEL) && state->m_reels)
	{
		if ( stepper_optic_state(0) ) state->m_optic_pattern |=  0x01;
		else                          state->m_optic_pattern &= ~0x01;

		if ( stepper_optic_state(1) ) state->m_optic_pattern |=  0x02;
		else                          state->m_optic_pattern &= ~0x02;
	}
}


static WRITE8_DEVICE_HANDLER( pia_ic6_porta_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	LOG(("%s: IC6 PIA Write A %2x\n", device->machine().describe_context(),data));
	if (state->m_mod_number <4)
	{
		state->m_ay_data = data;
		update_ay(device);
	}
}


static WRITE_LINE_DEVICE_HANDLER( pia_ic6_ca2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG(("%s: IC6 PIA write CA2 %2x (AY8913 BC1)\n", device->machine().describe_context(),state));
	if (drvstate->m_mod_number <4)
	{
		if ( state ) drvstate->m_ay8913_address |=  0x01;
		else         drvstate->m_ay8913_address &= ~0x01;
		update_ay(device);
	}
}


static WRITE_LINE_DEVICE_HANDLER( pia_ic6_cb2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG(("%s: IC6 PIA write CB2 %2x (AY8913 BCDIR)\n", device->machine().describe_context(),state));
	if (drvstate->m_mod_number <4)
	{
		if ( state ) drvstate->m_ay8913_address |=  0x02;
		else         drvstate->m_ay8913_address &= ~0x02;
		update_ay(device);
	}
}


static const pia6821_interface pia_ic6_intf =
{
	DEVCB_NULL,		/* port A in */
	DEVCB_NULL,		/* port B in */
	DEVCB_NULL,		/* line CA1 in */
	DEVCB_NULL,		/* line CB1 in */
	DEVCB_NULL,		/* line CA2 in */
	DEVCB_NULL,		/* line CB2 in */
	DEVCB_HANDLER(pia_ic6_porta_w),		/* port A out */
	DEVCB_HANDLER(pia_ic6_portb_w),		/* port B out */
	DEVCB_LINE(pia_ic6_ca2_w),			/* line CA2 out */
	DEVCB_LINE(pia_ic6_cb2_w),			/* port CB2 out */
	DEVCB_LINE(cpu0_irq),				/* IRQA */
	DEVCB_LINE(cpu0_irq)				/* IRQB */
};


/* IC7 Reel C and D, mechanical meters/Reel E and F, input strobe bit A */
static WRITE8_DEVICE_HANDLER( pia_ic7_porta_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	LOG(("%s: IC7 PIA Port A Set to %2x (Reel C and D)\n", device->machine().describe_context(),data));
	if (state->m_reel_mux == SEVEN_REEL)
	{
		stepper_update(5, data&0x0F);
		stepper_update(6, (data >> 4)&0x0F);
		awp_draw_reel(5);
		awp_draw_reel(6);
	}
	else if (state->m_reels)
	{
		stepper_update(2, data & 0x0F );
		stepper_update(3, (data>>4) & 0x0F );
		awp_draw_reel(2);
		awp_draw_reel(3);
	}

	if (state->m_reel_flag && (state->m_reel_mux == STANDARD_REEL) && state->m_reels)
	{
		if ( stepper_optic_state(2) ) state->m_optic_pattern |=  0x04;
		else                          state->m_optic_pattern &= ~0x04;
		if ( stepper_optic_state(3) ) state->m_optic_pattern |=  0x08;
		else                          state->m_optic_pattern &= ~0x08;
	}
}

static WRITE8_DEVICE_HANDLER( pia_ic7_portb_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	if (state->m_hopper == HOPPER_DUART_A)
	{
		//duart write data
	}
	else if (state->m_hopper == HOPPER_NONDUART_A)
	{
		//hoppr1_drive_motor(data & 0x10);
	}

    state->m_mmtr_data = data;
}

static READ8_DEVICE_HANDLER( pia_ic7_portb_r )
{
/* The meters are connected to a voltage drop sensor, where current
flowing through them also passes through pin B7, meaning that when
any meter is activated, pin B7 goes high.
As for why they connected this to an output port rather than using
CB1, no idea, although it proved of benefit when the reel multiplexer was designed
as it allows a separate meter to be used when the rest of the port is blocked.
This appears to have confounded the schematic drawer, who has assumed that
all eight meters are driven from this port, giving the 8 line driver chip
9 connections in total. */

	//This may be overkill, but the meter sensing is VERY picky

	int combined_meter = MechMtr_GetActivity(0) | MechMtr_GetActivity(1) |
						 MechMtr_GetActivity(2) | MechMtr_GetActivity(3) |
						 MechMtr_GetActivity(4) | MechMtr_GetActivity(5) |
						 MechMtr_GetActivity(6) | MechMtr_GetActivity(7);

	if(combined_meter)
	{
		return 0x80;
	}
	else
	{
		return 0x00;
	}
}







static WRITE_LINE_DEVICE_HANDLER( pia_ic7_ca2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG(("%s: IC7 PIA write CA2 %2x (input strobe bit 0 / LED A)\n", device->machine().describe_context(),state));

	drvstate->m_IC23GA = state;
	ic24_setup(drvstate);
	ic23_update(drvstate);
}

static WRITE_LINE_DEVICE_HANDLER( pia_ic7_cb2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	drvstate->m_remote_meter = state?0x80:0x00;
}

static const pia6821_interface pia_ic7_intf =
{
	DEVCB_NULL,		/* port A in */
	DEVCB_HANDLER(pia_ic7_portb_r),		/* port B in */
	DEVCB_NULL,		/* line CA1 in */
	DEVCB_NULL,		/* line CB1 in */
	DEVCB_NULL,		/* line CA2 in */
	DEVCB_NULL,		/* line CB2 in */
	DEVCB_HANDLER(pia_ic7_porta_w),		/* port A out */
	DEVCB_HANDLER(pia_ic7_portb_w),		/* port B out */
	DEVCB_LINE(pia_ic7_ca2_w),			/* line CA2 out */
	DEVCB_LINE(pia_ic7_cb2_w),			/* line CB2 out */
	DEVCB_LINE(cpu0_irq),				/* IRQA */
	DEVCB_LINE(cpu0_irq)				/* IRQB */
};


/* IC8, Inputs, TRIACS, alpha clock */
static READ8_DEVICE_HANDLER( pia_ic8_porta_r )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	static const char *const portnames[] = { "ORANGE1", "ORANGE2", "BLACK1", "BLACK2", "ORANGE1", "ORANGE2", "DIL1", "DIL2" };
	pia6821_device *pia_ic5 = device->machine().device<pia6821_device>("pia_ic5");

	LOG_IC8(("%s: IC8 PIA Read of Port A (MUX input data)\n", device->machine().describe_context()));
/* The orange inputs are polled twice as often as the black ones, for reasons of efficiency.
   This is achieved via connecting every input line to an AND gate, thus allowing two strobes
   to represent each orange input bank (strobes are active low). */
	pia_ic5->cb1_w(input_port_read(device->machine(), "AUX2") & 0x80);
	return input_port_read(device->machine(), portnames[state->m_input_strobe]);
}


static WRITE8_DEVICE_HANDLER( pia_ic8_portb_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	if (state->m_hopper == HOPPER_DUART_B)
	{
//      duart.drive_sensor(data & 0x04, data & 0x01, 0, 0);
	}
	else if (state->m_hopper == HOPPER_DUART_C)
	{
//      duart.drive_sensor(data & 0x04, data & 0x01, data & 0x04, data & 0x02);
	}
	int i;
	LOG_IC8(("%s: IC8 PIA Port B Set to %2x (OUTPUT PORT, TRIACS)\n", device->machine().describe_context(),data));
	for (i = 0; i < 8; i++)
	{
		output_set_indexed_value("triac", i, data & (1 << i));
	}
}

static WRITE_LINE_DEVICE_HANDLER( pia_ic8_ca2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG_IC8(("%s: IC8 PIA write CA2 (input_strobe bit 2 / LED C) %02X\n", device->machine().describe_context(), state & 0xFF));

	drvstate->m_IC23GC = state;
	ic23_update(drvstate);
}


static WRITE_LINE_DEVICE_HANDLER( pia_ic8_cb2_w )
{
	mpu4_state *drvstate = device->machine().driver_data<mpu4_state>();
	LOG_IC8(("%s: IC8 PIA write CB2 (alpha clock) %02X\n", device->machine().describe_context(), state & 0xFF));

	// DM Data pin B
	if (drvstate->m_alpha_clock != state)
	{
		if (!drvstate->m_alpha_clock)//falling edge
		{
			ROC10937_shift_data(0, drvstate->m_alpha_data_line?0:1);
		}
	}
	drvstate->m_alpha_clock = state;
	ROC10937_draw_16seg(0);
}


static const pia6821_interface pia_ic8_intf =
{
	DEVCB_HANDLER(pia_ic8_porta_r),		/* port A in */
	DEVCB_NULL,		/* port B in */
	DEVCB_NULL,		/* line CA1 in */
	DEVCB_NULL,		/* line CB1 in */
	DEVCB_NULL,		/* line CA2 in */
	DEVCB_NULL,		/* line CB2 in */
	DEVCB_NULL,		/* port A out */
	DEVCB_HANDLER(pia_ic8_portb_w),		/* port B out */
	DEVCB_LINE(pia_ic8_ca2_w),			/* line CA2 out */
	DEVCB_LINE(pia_ic8_cb2_w),			/* port CB2 out */
	DEVCB_LINE(cpu0_irq),				/* IRQA */
	DEVCB_LINE(cpu0_irq)				/* IRQB */
};

// universal sampled sound program card PCB 683077
// Sampled sound card, using a PIA and PTM for timing and data handling
static WRITE8_DEVICE_HANDLER( pia_gb_porta_w )
{
	device_t *msm6376 = device->machine().device("msm6376");
	LOG_SS(("%s: GAMEBOARD: PIA Port A Set to %2x\n", device->machine().describe_context(),data));
	okim6376_w(msm6376, 0, data);
}

static WRITE8_DEVICE_HANDLER( pia_gb_portb_w )
{
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	device_t *msm6376 = device->machine().device("msm6376");

	int changed = state->m_expansion_latch^data;

	LOG_SS(("%s: GAMEBOARD: PIA Port A Set to %2x\n", device->machine().describe_context(),data));

	state->m_expansion_latch = data;

	if ( changed & 0x20)
	{ // digital volume clock line changed
		if ( !(data & 0x20) )
		{ // changed from high to low,
			if ( !(data & 0x10) )
			{
				if ( state->m_global_volume < 31 ) state->m_global_volume++; //steps unknown
			}
			else
			{
				if ( state->m_global_volume > 0  ) state->m_global_volume--;
			}

			{
//              float percent = (32-state->m_global_volume)/32.0; //volume_override?1.0:(32-state->m_global_volume)/32.0;
//              LOG(("GAMEBOARD: OKI volume %f \n",percent));
			}
		}
	}
	okim6376_ch2_w(msm6376,data&0x02);
	okim6376_st_w(msm6376,data&0x01);

}
static READ8_DEVICE_HANDLER( pia_gb_portb_r )
{
	device_t *msm6376 = device->machine().device("msm6376");
	mpu4_state *state = device->machine().driver_data<mpu4_state>();
	LOG_SS(("%s: GAMEBOARD: PIA Read of Port B\n",device->machine().describe_context()));
	int data=0;
	//
	// b7, 1 = OKI ready, 0 = OKI busy
	// b5, vol clock
	// b4, 1 = Vol down, 0 = Vol up
	//

	if ( okim6376_busy_r(msm6376) ) data |= 0x80;
	else							data &= ~0x80;

	if ( okim6376_nar_r(msm6376) )	data |= 0x40;
	else							data &= ~0x40;

	return ( data | state->m_expansion_latch );
}

static WRITE_LINE_DEVICE_HANDLER( pia_gb_ca2_w )
{
	LOG_SS(("%s: GAMEBOARD: OKI RESET data = %02X\n", device->machine().describe_context(), state));

//  reset line
}

static WRITE_LINE_DEVICE_HANDLER( pia_gb_cb2_w )
{
	mpu4_state *mstate = device->machine().driver_data<mpu4_state>();
	//Some BWB games use this to drive the bankswitching
	if (mstate->m_bwb_bank)
	{
		mstate->m_pageval=state;

		memory_set_bank(device->machine(), "bank1",mstate->m_pageval + (mstate->m_pageset?4:0));
	}
}

static const pia6821_interface pia_ic4ss_intf =
{
	DEVCB_NULL,		/* port A in */
	DEVCB_HANDLER(pia_gb_portb_r),	/* port B in */
	DEVCB_NULL,		/* line CA1 in */
	DEVCB_NULL,		/* line CB1 in */
	DEVCB_NULL,		/* line CA2 in */
	DEVCB_NULL,		/* line CB2 in */
	DEVCB_HANDLER(pia_gb_porta_w),		/* port A out */
	DEVCB_HANDLER(pia_gb_portb_w),		/* port B out */
	DEVCB_LINE(pia_gb_ca2_w),		/* line CA2 out */
	DEVCB_LINE(pia_gb_cb2_w),		/* line CB2 out */
	DEVCB_NULL,		/* IRQA */
	DEVCB_NULL		/* IRQB */
};

//Sampled sound timer
/*
FIXME
The MSM6376 sound chip is configured in a slightly strange way, to enable dynamic
sample rate changes (8Khz, 10.6 Khz, 16 KHz) by varying the clock.
According to the BwB programmer's guide, the formula is:
MSM6376 clock frequency:-
freq = (1720000/((t3L+1)(t3H+1)))*[(t3H(T3L+1)+1)/(2(t1+1))]
where [] means rounded up integer,
t3L is the LSB of Clock 3,
t3H is the MSB of Clock 3,
+and t1 is the initial value in clock 1.

The sample speed divisor is f/300
*/

//O3 -> G1  O1 -> c2 o2 -> c1
static WRITE8_DEVICE_HANDLER( ic3ss_o1_callback )
{
	downcast<ptm6840_device *>(device)->set_c2(data);
}


static WRITE8_DEVICE_HANDLER( ic3ss_o2_callback )//Generates 'beep' tone
{
	downcast<ptm6840_device *>(device)->set_c1(data);//?
}


static WRITE8_DEVICE_HANDLER( ic3ss_o3_callback )
{
	downcast<ptm6840_device *>(device)->set_g1(data); /* this output is the clock for timer1 */
}


static const ptm6840_interface ptm_ic3ss_intf =
{
	MPU4_MASTER_CLOCK / 4,
	{ 0, 0, 0 },
	{ DEVCB_HANDLER(ic3ss_o1_callback),
	  DEVCB_HANDLER(ic3ss_o2_callback),
	  DEVCB_HANDLER(ic3ss_o3_callback) },
	DEVCB_NULL//LINE(cpu1_ptm_irq)
};

/* input ports for MPU4 board */
static INPUT_PORTS_START( mpu4 )
	PORT_START("ORANGE1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("00")//  20p level
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("01")// 100p level
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("02")// Token 1 level
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("03")// Token 2 level
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("04")
	PORT_CONFNAME( 0xE0, 0x00, "Stake Key" )
	PORT_CONFSETTING(    0x00, "Not fitted / 5p"  )
	PORT_CONFSETTING(    0x20, "10p" )
	PORT_CONFSETTING(    0x40, "20p" )
	PORT_CONFSETTING(    0x60, "25p" )
	PORT_CONFSETTING(    0x80, "30p" )
	PORT_CONFSETTING(    0xA0, "40p" )
	PORT_CONFSETTING(    0xC0, "50p" )
	PORT_CONFSETTING(    0xE0, "1 GBP" )

	PORT_START("ORANGE2")
	PORT_CONFNAME( 0x0F, 0x00, "Jackpot / Prize Key" )
	PORT_CONFSETTING(    0x00, "Not fitted"  )
	PORT_CONFSETTING(    0x01, "3 GBP"  )
	PORT_CONFSETTING(    0x02, "4 GBP"  )
	PORT_CONFSETTING(    0x08, "5 GBP"  )
	PORT_CONFSETTING(    0x03, "6 GBP"  )
	PORT_CONFSETTING(    0x04, "6 GBP Token"  )
	PORT_CONFSETTING(    0x05, "8 GBP"  )
	PORT_CONFSETTING(    0x06, "8 GBP Token"  )
	PORT_CONFSETTING(    0x07, "10 GBP"  )
	PORT_CONFSETTING(    0x09, "15 GBP"  )
	PORT_CONFSETTING(    0x0A, "25 GBP"  )
	PORT_CONFSETTING(    0x0B, "25 GBP (Licensed Betting Office Profile)"  )
	PORT_CONFSETTING(    0x0C, "35 GBP"  )
	PORT_CONFSETTING(    0x0D, "70 GBP"  )
	PORT_CONFSETTING(    0x0E, "Reserved"  )
	PORT_CONFSETTING(    0x0F, "Reserved"  )

	PORT_CONFNAME( 0xF0, 0x00, "Percentage Key" )
	PORT_CONFSETTING(    0x00, "Not fitted / 68% (Invalid for UK Games)"  )
	PORT_CONFSETTING(    0x10, "70" )
	PORT_CONFSETTING(    0x20, "72" )
	PORT_CONFSETTING(    0x30, "74" )
	PORT_CONFSETTING(    0x40, "76" )
	PORT_CONFSETTING(    0x50, "78" )
	PORT_CONFSETTING(    0x60, "80" )
	PORT_CONFSETTING(    0x70, "82" )
	PORT_CONFSETTING(    0x80, "84" )
	PORT_CONFSETTING(    0x90, "86" )
	PORT_CONFSETTING(    0xA0, "88" )
	PORT_CONFSETTING(    0xB0, "90" )
	PORT_CONFSETTING(    0xC0, "92" )
	PORT_CONFSETTING(    0xD0, "94" )
	PORT_CONFSETTING(    0xE0, "96" )
	PORT_CONFSETTING(    0xF0, "98" )

	PORT_START("BLACK1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Hi")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_BUTTON2) PORT_NAME("Lo")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER)   PORT_NAME("18")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER)   PORT_NAME("19")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER)	PORT_NAME("20")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Test Button") PORT_CODE(KEYCODE_W)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Refill Key") PORT_CODE(KEYCODE_R) PORT_TOGGLE
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_INTERLOCK) PORT_NAME("Cashbox (Back) Door")  PORT_CODE(KEYCODE_Q) PORT_TOGGLE

	PORT_START("BLACK2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("24")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("25")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_BUTTON3) PORT_NAME("Cancel")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_BUTTON4) PORT_NAME("Hold 1")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON5) PORT_NAME("Hold 2")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_BUTTON6) PORT_NAME("Hold 3")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_BUTTON7) PORT_NAME("Hold 4")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_START1)

	PORT_START("DIL1")
	PORT_DIPNAME( 0x80, 0x00, "DIL101" ) PORT_DIPLOCATION("DIL1:01")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On  ) )
	PORT_DIPNAME( 0x40, 0x00, "DIL102" ) PORT_DIPLOCATION("DIL1:02")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On  ) )
	PORT_DIPNAME( 0x20, 0x00, "DIL103" ) PORT_DIPLOCATION("DIL1:03")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On  ) )
	PORT_DIPNAME( 0x10, 0x00, "DIL104" ) PORT_DIPLOCATION("DIL1:04")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On  ) )
	PORT_DIPNAME( 0x08, 0x00, "DIL105" ) PORT_DIPLOCATION("DIL1:05")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On  ) )
	PORT_DIPNAME( 0x04, 0x00, "DIL106" ) PORT_DIPLOCATION("DIL1:06")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On  ) )
	PORT_DIPNAME( 0x02, 0x00, "DIL107" ) PORT_DIPLOCATION("DIL1:07")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On  ) )
	PORT_DIPNAME( 0x01, 0x00, "DIL108" ) PORT_DIPLOCATION("DIL1:08")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On  ) )

	PORT_START("DIL2")
	PORT_DIPNAME( 0x80, 0x00, "DIL201" ) PORT_DIPLOCATION("DIL2:01")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On  ) )
	PORT_DIPNAME( 0x40, 0x00, "DIL202" ) PORT_DIPLOCATION("DIL2:02")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On  ) )
	PORT_DIPNAME( 0x20, 0x00, "DIL203" ) PORT_DIPLOCATION("DIL2:03")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On  ) )
	PORT_DIPNAME( 0x10, 0x00, "DIL204" ) PORT_DIPLOCATION("DIL2:04")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On  ) )
	PORT_DIPNAME( 0x08, 0x00, "DIL205" ) PORT_DIPLOCATION("DIL2:05")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On  ) )
	PORT_DIPNAME( 0x04, 0x00, "DIL206" ) PORT_DIPLOCATION("DIL2:06")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On  ) )
	PORT_DIPNAME( 0x02, 0x00, "DIL207" ) PORT_DIPLOCATION("DIL2:07")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On  ) )
	PORT_DIPNAME( 0x01, 0x00, "DIL208" ) PORT_DIPLOCATION("DIL2:08")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On  ) )

	PORT_START("AUX1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("0")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("1")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("2")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("3")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("4")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("5")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("6")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("7")

	PORT_START("AUX2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_COIN1) PORT_NAME("10p")PORT_IMPULSE(5)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_COIN2) PORT_NAME("20p")PORT_IMPULSE(5)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_COIN3) PORT_NAME("50p")PORT_IMPULSE(5)
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_COIN4) PORT_NAME("100p")PORT_IMPULSE(5)
INPUT_PORTS_END


static INPUT_PORTS_START( connect4 )
	PORT_START("ORANGE1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("00")
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("01")
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("02")
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("03")
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("04")
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("05")
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("06")
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("07")

	PORT_START("ORANGE2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("08")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("09")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("10")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("11")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("12")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("13")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("14")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("15")

	PORT_START("BLACK1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("16")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("17")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("18")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("19")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("20")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Test Switch")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Refill Key") PORT_CODE(KEYCODE_R) PORT_TOGGLE
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("Door Switch?") PORT_TOGGLE

	PORT_START("BLACK2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Select")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("25")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_START2) PORT_NAME("Pass")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_START1) PORT_NAME("Play")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("28")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("29")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("30")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_BUTTON2) PORT_NAME("Drop")

	PORT_START("DIL1")
	PORT_DIPNAME( 0x80, 0x00, "DIL101" ) PORT_DIPLOCATION("DIL1:01")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On  ) )
	PORT_DIPNAME( 0x40, 0x00, "DIL102" ) PORT_DIPLOCATION("DIL1:02")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On  ) )
	PORT_DIPNAME( 0x20, 0x00, "DIL103" ) PORT_DIPLOCATION("DIL1:03")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On  ) )
	PORT_DIPNAME( 0x10, 0x00, "DIL104" ) PORT_DIPLOCATION("DIL1:04")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On  ) )
	PORT_DIPNAME( 0x08, 0x00, "DIL105" ) PORT_DIPLOCATION("DIL1:05")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On  ) )
	PORT_DIPNAME( 0x04, 0x00, "DIL106" ) PORT_DIPLOCATION("DIL1:06")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On  ) )
	PORT_DIPNAME( 0x02, 0x00, "DIL107" ) PORT_DIPLOCATION("DIL1:07")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On  ) )
	PORT_DIPNAME( 0x01, 0x00, "DIL108" ) PORT_DIPLOCATION("DIL1:08")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On  ) )

	PORT_START("DIL2")
	PORT_DIPNAME( 0x80, 0x00, "DIL201" ) PORT_DIPLOCATION("DIL2:01")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On  ) )
	PORT_DIPNAME( 0x40, 0x00, "DIL202" ) PORT_DIPLOCATION("DIL2:02")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On  ) )
	PORT_DIPNAME( 0x20, 0x00, "DIL203" ) PORT_DIPLOCATION("DIL2:03")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On  ) )
	PORT_DIPNAME( 0x10, 0x00, "DIL204" ) PORT_DIPLOCATION("DIL2:04")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On  ) )
	PORT_DIPNAME( 0x08, 0x00, "DIL205" ) PORT_DIPLOCATION("DIL2:05")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On  ) )
	PORT_DIPNAME( 0x04, 0x00, "DIL206" ) PORT_DIPLOCATION("DIL2:06")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On  ) )
	PORT_DIPNAME( 0x02, 0x00, "DIL207" ) PORT_DIPLOCATION("DIL2:07")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On  ) )
	PORT_DIPNAME( 0x01, 0x00, "DIL208" ) PORT_DIPLOCATION("DIL2:08")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On  ) )

	PORT_START("AUX1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("0")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("1")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("2")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("3")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("4")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("5")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("6")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("7")

	PORT_START("AUX2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_COIN1) PORT_NAME("10p")PORT_IMPULSE(5)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_COIN2) PORT_NAME("20p")PORT_IMPULSE(5)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_COIN3) PORT_NAME("50p")PORT_IMPULSE(5)
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_COIN4) PORT_NAME("100p")PORT_IMPULSE(5)
INPUT_PORTS_END

static INPUT_PORTS_START( gamball )
	PORT_START("ORANGE1")
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("00")
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("01")
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("02")
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("03")
	PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("04")
	PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("05")
	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("06")
	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("07")

	PORT_START("ORANGE2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("08")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("09")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("10")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("11")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("12")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("13")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("14")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("15")

	PORT_START("BLACK1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Hi")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_BUTTON2) PORT_NAME("Lo")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("18")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("19")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("20")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Test Button") PORT_CODE(KEYCODE_W)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_SERVICE) PORT_NAME("Refill Key") PORT_CODE(KEYCODE_R) PORT_TOGGLE
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_INTERLOCK) PORT_NAME("Cashbox Door")  PORT_CODE(KEYCODE_Q) PORT_TOGGLE

	PORT_START("BLACK2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("24")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("25")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_BUTTON3) PORT_NAME("Cancel/Collect")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_BUTTON4) PORT_NAME("Hold/Nudge 1")
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON5) PORT_NAME("Hold/Nudge 2")
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_BUTTON6) PORT_NAME("Hold/Nudge 3")
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_BUTTON7) PORT_NAME("Hold/Nudge 4")
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_START1)

	PORT_START("DIL1")
	PORT_DIPNAME( 0x80, 0x00, "DIL101" ) PORT_DIPLOCATION("DIL1:01")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On  ) )
	PORT_DIPNAME( 0x40, 0x00, "DIL102" ) PORT_DIPLOCATION("DIL1:02")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On  ) )
	PORT_DIPNAME( 0x20, 0x00, "DIL103" ) PORT_DIPLOCATION("DIL1:03")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On  ) )
	PORT_DIPNAME( 0x10, 0x00, "DIL104" ) PORT_DIPLOCATION("DIL1:04")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On  ) )
	PORT_DIPNAME( 0x08, 0x00, "DIL105" ) PORT_DIPLOCATION("DIL1:05")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On  ) )
	PORT_DIPNAME( 0x04, 0x00, "DIL106" ) PORT_DIPLOCATION("DIL1:06")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On  ) )
	PORT_DIPNAME( 0x02, 0x00, "DIL107" ) PORT_DIPLOCATION("DIL1:07")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On  ) )
	PORT_DIPNAME( 0x01, 0x00, "DIL108" ) PORT_DIPLOCATION("DIL1:08")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On  ) )

	PORT_START("DIL2")
	PORT_DIPNAME( 0x80, 0x00, "DIL201" ) PORT_DIPLOCATION("DIL2:01")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x80, DEF_STR( On  ) )
	PORT_DIPNAME( 0x40, 0x00, "DIL202" ) PORT_DIPLOCATION("DIL2:02")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x40, DEF_STR( On  ) )
	PORT_DIPNAME( 0x20, 0x00, "DIL203" ) PORT_DIPLOCATION("DIL2:03")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On  ) )
	PORT_DIPNAME( 0x10, 0x00, "DIL204" ) PORT_DIPLOCATION("DIL2:04")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x10, DEF_STR( On  ) )
	PORT_DIPNAME( 0x08, 0x00, "DIL205" ) PORT_DIPLOCATION("DIL2:05")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x08, DEF_STR( On  ) )
	PORT_DIPNAME( 0x04, 0x00, "DIL206" ) PORT_DIPLOCATION("DIL2:06")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x04, DEF_STR( On  ) )
	PORT_DIPNAME( 0x02, 0x00, "DIL207" ) PORT_DIPLOCATION("DIL2:07")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x02, DEF_STR( On  ) )
	PORT_DIPNAME( 0x01, 0x00, "DIL208" ) PORT_DIPLOCATION("DIL2:08")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On  ) )

	PORT_START("AUX1")
	PORT_BIT(0xFF, IP_ACTIVE_HIGH, IPT_SPECIAL)//Handled by Gamball unit

	PORT_START("AUX2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_SPECIAL)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_COIN1) PORT_NAME("10p")PORT_IMPULSE(5)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_COIN2) PORT_NAME("20p")PORT_IMPULSE(5)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_COIN3) PORT_NAME("50p")PORT_IMPULSE(5)
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_COIN4) PORT_NAME("100p")PORT_IMPULSE(5)
INPUT_PORTS_END

static const stepper_interface barcrest_reel_interface =
{
	BARCREST_48STEP_REEL,
	92,
	4,
	0x00
};

static const stepper_interface barcrest_reelrev_interface =
{
	BARCREST_48STEP_REEL,
	92,
	4,
	0x00,
	1
};

static const stepper_interface barcrest_opto1_interface =
{
	BARCREST_48STEP_REEL,
	4,
	12,
	0x00
};

static const stepper_interface barcrest_opto2_interface =
{
	BARCREST_48STEP_REEL,
	92,
	3,
	0x00
};

static const stepper_interface barcrest_opto3_interface =
{
	BARCREST_48STEP_REEL,
	0,
	5,
	0x00
};

static const stepper_interface bwb_opto1_interface =
{
	BARCREST_48STEP_REEL,
	96,
	3,
	0x00
};

/* Common configurations */
static void mpu4_config_common(running_machine &machine)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_ic24_timer = machine.scheduler().timer_alloc(FUNC(ic24_timeout));
}

static void mpu4_config_common_reels(running_machine &machine,int reels)
{
	int n;
	/* setup n default 96 half step reels, using the standard optic flag */
	for ( n = 0; n < reels; n++ )
	{
		stepper_config(machine, n, &barcrest_reel_interface);
	}
	awp_reel_setup();
}

static MACHINE_START( mpu4mod2 )
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	mpu4_config_common(machine);

	state->m_link7a_connected=0;
	state->m_mod_number=2;

	/* setup 8 mechanical meters */
	MechMtr_config(machine,8);

	/* setup the standard oki MSC1937 display */
	ROC10937_init(0, MSC1937,0);
}

static MACHINE_START( mpu4dutch )
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	mpu4_config_common(machine);

	state->m_link7a_connected=0;

// setup 8 mechanical meters ////////////////////////////////////////////
	MechMtr_config(machine,8);

// setup the standard oki MSC1937 display ///////////////////////////////
	ROC10937_init(0, MSC1937,0);	// does oldtimer use a OKI MSC1937 alpha display controller?
}

static MACHINE_START( mpu4mod4 )
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	mpu4_config_common(machine);

	state->m_link7a_connected=0;
	state->m_mod_number=4;

// setup 8 mechanical meters ////////////////////////////////////////////
	MechMtr_config(machine,8);

// setup the standard oki MSC1937 display ///////////////////////////////
	ROC10937_init(0, MSC1937,0);
}

/*
Characteriser (CHR)

As built, the CHR is a PAL which can perform basic bit manipulation according to
an as yet unknown unique key. However, the programmers decided to best use this protection device in read/write/compare
cycles, storing almost the entire 'hidden' data table in the ROMs in plain sight. Only later rebuilds by BwB
avoided this 'feature' of the development kit, and will need a different setup.

This information has been used to generate the CHR tables loaded by the programs, until a key can be determined.

For most Barcrest games, the following method was used:

The initial 'PALTEST' routine as found in the Barcrest programs simply writes the first 'call' to the CHR space,
to read back the 'response'. There is no attempt to alter the order or anything else, just
a simple runthrough of the entire data table. The only 'catch' in this is to note that the CHR chip always scans
through the table starting at the last accessed data value, unless 00 is used to reset to the beginning. This is obviously
a simplification, in fact the PAL does bit manipulation with some latching.

However, a final 8 byte row, that controls the lamp matrix is not tested - to date, no-one outside of Barcrest knows
how this is generated, and currently trial and error is the only sensible method. It is noted that the default,
of all 00, is sometimes the correct answer, particularly in non-Barcrest use of the CHR chip, though when used normally,
there are again fixed call values.
*/


static WRITE8_HANDLER( characteriser_w )
{
	mpu4_state *state = space->machine().driver_data<mpu4_state>();
	int x;
	int call=data;
	LOG_CHR_FULL(("%04x Characteriser write offset %02X data %02X", cpu_get_previouspc(&space->device()),offset,data));
	if (!state->m_current_chr_table)
		fatalerror("No Characteriser Table @ %04x\n", cpu_get_previouspc(&space->device()));

	if (offset == 0)
	{
		{
			if (call == 0)
			{
				state->m_prot_col = 0;
			}
			else
			{
				for (x = state->m_prot_col; x < 64; x++)
				{
					if	(state->m_current_chr_table[(x)].call == call)
					{
						state->m_prot_col = x;
						LOG_CHR(("Characteriser find column %02X\n",state->m_prot_col));
						break;
					}
				}
			}
		}
	}
	else if (offset == 2)
	{
		LOG_CHR(("Characteriser write 2 data %02X\n",data));
		switch (call)
		// Rather than the search strategy, we can map the calls directly here. Note that they are hex versions of the square number series
		{
			case 0x00:
			state->m_lamp_col = 0;
			break;
			case 0x01:
			state->m_lamp_col = 1;
			break;
			case 0x04:
			state->m_lamp_col = 2;
			break;
			case 0x09:
			state->m_lamp_col = 3;
			break;
			case 0x10:
			state->m_lamp_col = 4;
			break;
			case 0x19:
			state->m_lamp_col = 5;
			break;
			case 0x24:
			state->m_lamp_col = 6;
			break;
			case 0x31:
			state->m_lamp_col = 7;
			break;
		}
		LOG_CHR(("Characteriser find 2 column %02X\n",state->m_lamp_col));
	}
}


static READ8_HANDLER( characteriser_r )
{
	mpu4_state *state = space->machine().driver_data<mpu4_state>();
	if (!state->m_current_chr_table)
		fatalerror("No Characteriser Table @ %04x\n", cpu_get_previouspc(&space->device()));

	LOG_CHR(("Characteriser read offset %02X \n",offset));
	if (offset == 0)
	{
		LOG_CHR(("Characteriser read data %02X \n",state->m_current_chr_table[state->m_prot_col].response));
		return state->m_current_chr_table[state->m_prot_col].response;
	}
	if (offset == 3)
	{
		LOG_CHR(("Characteriser read data off 3 %02X \n",state->m_current_chr_table[state->m_lamp_col+64].response));
		return state->m_current_chr_table[state->m_lamp_col+64].response;
	}
	return 0;
}

/*
BwB Characteriser (CHR)

The BwB method of protection is considerably different to the Barcrest one, with any
incorrect behaviour manifesting in ridiculously large payouts. The hardware is the
same, however the main weakness of the software has been eliminated.

In fact, the software seems deliberately designed to mislead, but is (fortunately for
us) prone to similar weaknesses that allow a per game solution.

Project Amber performed a source analysis (available on request) which appears to make things work.
Said weaknesses (A Cheats Guide according to Project Amber)

The common initialisation sequence is "00 04 04 0C 0C 1C 14 2C 5C 2C"
                                        0  1  2  3  4  5  6  7  8
Using debug search for the first read from said string (best to find it first).

At this point, the X index on the CPU is at the magic number address.

The subsequent calls for each can be found based on the magic address

           (0) = ( (BWBMagicAddress))
           (1) = ( (BWBMagicAddress + 1))
           (2) = ( (BWBMagicAddress + 2))
           (3) = ( (BWBMagicAddress + 4))
           (4) = ( (BWBMagicAddress - 5))
           (5) = ( (BWBMagicAddress - 4))
           (6) = ( (BWBMagicAddress - 3))
           (7) = ( (BWBMagicAddress - 2))
           (8) = ( (BWBMagicAddress - 1))

These return the standard init sequence as above.

For ease of understanding, we use three tables, one holding the common responses
and two holding the appropriate call and response pairs for the two stages of operation
*/


static WRITE8_HANDLER( bwb_characteriser_w )
{
	mpu4_state *state = space->machine().driver_data<mpu4_state>();
	int x;
	int call=data;
	LOG_CHR_FULL(("%04x Characteriser write offset %02X data %02X \n", cpu_get_previouspc(&space->device()),offset,data));
	if (!state->m_current_chr_table)
		fatalerror("No Characteriser Table @ %04x\n", cpu_get_previouspc(&space->device()));

	if ((offset & 0x3f)== 0)//initialisation is always at 0x800
	{
		if (!state->m_chr_state)
		{
			state->m_chr_state=1;
			state->m_chr_counter=0;
		}
		if (call == 0)
		{
			state->m_init_col ++;
		}
		else
		{
			state->m_init_col =0;
		}
	}

	state->m_chr_value = space->machine().rand();
	for (x = 0; x < 4; x++)
	{
		if	(state->m_current_chr_table[(x)].call == call)
		{
			if (x == 0) // reinit
			{
				state->m_bwb_return = 0;
			}
			state->m_chr_value = bwb_chr_table_common[(state->m_bwb_return)];
			state->m_bwb_return++;
			break;
		}
	}
}

static READ8_HANDLER( bwb_characteriser_r )
{
	mpu4_state *state = space->machine().driver_data<mpu4_state>();

	LOG_CHR(("Characteriser read offset %02X \n",offset));


	if (offset ==0)
	{
		switch (state->m_chr_counter)
		{
			case 6:
			case 13:
			case 20:
			case 27:
			case 34:
			{
				return state->m_bwb_chr_table1[(((state->m_chr_counter + 1) / 7) - 1)].response;
				break;
			}
			default:
			{
				if (state->m_chr_counter > 34)
				{
					state->m_chr_counter = 35;
					state->m_chr_state = 2;
				}
				state->m_chr_counter ++;
				return state->m_chr_value;
			}
		}
	}
	else
	{
		return state->m_chr_value;
	}
}

static const mpu4_chr_table ccelbr_data[72] = {
{0x00, 0x00},{0x1a, 0x84},{0x04, 0x8c},{0x10, 0xb8},{0x18, 0x74},{0x0f, 0x80},{0x13, 0x1c},{0x1b, 0xb4},
{0x03, 0xd8},{0x07, 0x74},{0x17, 0x00},{0x1d, 0xd4},{0x36, 0xc8},{0x35, 0x78},{0x2b, 0xa4},{0x28, 0x4c},
{0x39, 0xe0},{0x21, 0xdc},{0x22, 0xf4},{0x25, 0x88},{0x2c, 0x78},{0x29, 0x24},{0x31, 0x84},{0x34, 0xcc},
{0x0a, 0xb8},{0x1f, 0x74},{0x06, 0x90},{0x0e, 0x48},{0x1c, 0xa0},{0x12, 0x1c},{0x1e, 0x24},{0x0d, 0x94},
{0x14, 0xc8},{0x0a, 0xb8},{0x19, 0x74},{0x15, 0x00},{0x06, 0x94},{0x0f, 0x48},{0x08, 0x30},{0x1b, 0x90},
{0x1e, 0x08},{0x04, 0x60},{0x01, 0xd4},{0x0c, 0x58},{0x18, 0xf4},{0x1a, 0x18},{0x11, 0x74},{0x0b, 0x80},
{0x03, 0xdc},{0x17, 0x74},{0x10, 0xd0},{0x1d, 0x58},{0x0e, 0x24},{0x07, 0x94},{0x12, 0xd8},{0x09, 0x34},
{0x0d, 0x90},{0x1f, 0x58},{0x16, 0xf4},{0x05, 0x88},{0x13, 0x38},{0x1c, 0x24},{0x02, 0xd4},{0x00, 0x00},
{0x00, 0x00},{0x01, 0x50},{0x04, 0x00},{0x09, 0x50},{0x10, 0x10},{0x19, 0x40},{0x24, 0x04},{0x31, 0x00}
};

static const mpu4_chr_table gmball_data[72] = {
{0x00, 0x00},{0x1a, 0x0c},{0x04, 0x50},{0x10, 0x90},{0x18, 0xb0},{0x0f, 0x38},{0x13, 0xd4},{0x1b, 0xa0},
{0x03, 0xbc},{0x07, 0xd4},{0x17, 0x30},{0x1d, 0x90},{0x36, 0x38},{0x35, 0xc4},{0x2b, 0xac},{0x28, 0x70},
{0x39, 0x98},{0x21, 0xdc},{0x22, 0xdc},{0x25, 0x54},{0x2c, 0x80},{0x29, 0xb4},{0x31, 0x38},{0x34, 0xcc},
{0x0a, 0xe8},{0x1f, 0xf8},{0x06, 0xd4},{0x0e, 0x30},{0x1c, 0x00},{0x12, 0x84},{0x1e, 0x2c},{0x0d, 0xc8},
{0x14, 0xf8},{0x0a, 0x4c},{0x19, 0x58},{0x15, 0xd4},{0x06, 0xa8},{0x0f, 0x78},{0x08, 0x44},{0x1b, 0x0c},
{0x1e, 0x48},{0x04, 0x50},{0x01, 0x98},{0x0c, 0xd4},{0x18, 0xb0},{0x1a, 0xa0},{0x11, 0xa4},{0x0b, 0x3c},
{0x03, 0xdc},{0x17, 0xd4},{0x10, 0xb8},{0x1d, 0xd4},{0x0e, 0x30},{0x07, 0x88},{0x12, 0xe0},{0x09, 0x24},
{0x0d, 0x8c},{0x1f, 0xf8},{0x16, 0xcc},{0x05, 0x70},{0x13, 0x90},{0x1c, 0x20},{0x02, 0x9c},{0x00, 0x00},
{0x00, 0x00},{0x01, 0x18},{0x04, 0x08},{0x09, 0x10},{0x10, 0x00},{0x19, 0x18},{0x24, 0x08},{0x31, 0x00}
};

static const mpu4_chr_table grtecp_data[72] = {
{0x00, 0x00},{0x1a, 0x84},{0x04, 0xa4},{0x10, 0xac},{0x18, 0x70},{0x0f, 0x80},{0x13, 0x2c},{0x1b, 0xc0},
{0x03, 0xbc},{0x07, 0x5c},{0x17, 0x5c},{0x1d, 0x5c},{0x36, 0xdc},{0x35, 0x5c},{0x2b, 0xcc},{0x28, 0x68},
{0x39, 0xd0},{0x21, 0xb8},{0x22, 0xdc},{0x25, 0x54},{0x2c, 0x08},{0x29, 0x58},{0x31, 0x54},{0x34, 0x90},
{0x0a, 0xb8},{0x1f, 0x5c},{0x06, 0x5c},{0x0e, 0x44},{0x1c, 0x84},{0x12, 0xac},{0x1e, 0xe0},{0x0d, 0xbc},
{0x14, 0xcc},{0x0a, 0xe8},{0x19, 0x70},{0x15, 0x00},{0x06, 0x8c},{0x0f, 0x70},{0x08, 0x00},{0x1b, 0x84},
{0x1e, 0xa4},{0x04, 0xa4},{0x01, 0xbc},{0x0c, 0xdc},{0x18, 0x5c},{0x1a, 0xcc},{0x11, 0xe8},{0x0b, 0xe0},
{0x03, 0xbc},{0x17, 0x4c},{0x10, 0xc8},{0x1d, 0xf8},{0x0e, 0xd4},{0x07, 0xa8},{0x12, 0x68},{0x09, 0x40},
{0x0d, 0x0c},{0x1f, 0xd8},{0x16, 0xdc},{0x05, 0x54},{0x13, 0x98},{0x1c, 0x44},{0x02, 0x9c},{0x00, 0x00},
{0x00, 0x00},{0x01, 0x18},{0x04, 0x00},{0x09, 0x18},{0x10, 0x08},{0x19, 0x10},{0x24, 0x00},{0x31, 0x00}
};

static const mpu4_chr_table oldtmr_data[72] = {
{0x00, 0x00},{0x1a, 0x90},{0x04, 0xc0},{0x10, 0x54},{0x18, 0xa4},{0x0f, 0xf0},{0x13, 0x64},{0x1b, 0x90},
{0x03, 0xe4},{0x07, 0xd4},{0x17, 0x60},{0x1d, 0xb4},{0x36, 0xc0},{0x35, 0x70},{0x2b, 0x80},{0x28, 0x74},
{0x39, 0xa4},{0x21, 0xf4},{0x22, 0xe4},{0x25, 0xd0},{0x2c, 0x64},{0x29, 0x10},{0x31, 0x20},{0x34, 0x90},
{0x0a, 0xe4},{0x1f, 0xf4},{0x06, 0xc4},{0x0e, 0x70},{0x1c, 0x00},{0x12, 0x14},{0x1e, 0x00},{0x0d, 0x14},
{0x14, 0xa0},{0x0a, 0xf0},{0x19, 0x64},{0x15, 0x10},{0x06, 0x84},{0x0f, 0x70},{0x08, 0x00},{0x1b, 0x90},
{0x1e, 0x40},{0x04, 0x90},{0x01, 0xe4},{0x0c, 0xf4},{0x18, 0x64},{0x1a, 0x90},{0x11, 0x64},{0x0b, 0x90},
{0x03, 0xe4},{0x17, 0x50},{0x10, 0x24},{0x1d, 0xb4},{0x0e, 0xe0},{0x07, 0xd4},{0x12, 0xe4},{0x09, 0x50},
{0x0d, 0x04},{0x1f, 0xb4},{0x16, 0xc0},{0x05, 0xd0},{0x13, 0x64},{0x1c, 0x90},{0x02, 0xe4},{0x00, 0x00},
{0x00, 0x00},{0x01, 0x00},{0x04, 0x00},{0x09, 0x00},{0x10, 0x00},{0x19, 0x10},{0x24, 0x00},{0x31, 0x00}
};

static const bwb_chr_table blsbys_data1[5] = {
//Magic number 724A

// PAL Codes
// 0   1   2  3  4  5  6  7  8
// ??  ?? 20 0F 24 3C 36 27 09

	{0x67},{0x17},{0x0f},{0x24},{0x3c},
};

static const mpu4_chr_table blsbys_data[8] = {
{0xEF, 0x02},{0x81, 0x00},{0xCE, 0x00},{0x00, 0x2e},
{0x06, 0x20},{0xC6, 0x0f},{0xF8, 0x24},{0x8E, 0x3c},
};

// set percentage and other options. 2e 20 0f
// PAL Codes
// 0   1   2  3  4  5  6  7  8
// 42  2E 20 0F 24 3C 36 27 09
   //      6  0  7  0  8  0  7  0  0  8
//request 36 42 27 42 09 42 27 42 42 09
//verify  00 04 04 0C 0C 1C 14 2C 5C 2C

static DRIVER_INIT (m_oldtmr)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_reel_mux=SIX_REEL_1TO8;
	state->m_reels = 6;

	stepper_config(machine, 0, &barcrest_opto1_interface);
	stepper_config(machine, 1, &barcrest_opto1_interface);
	stepper_config(machine, 2, &barcrest_opto1_interface);
	stepper_config(machine, 3, &barcrest_opto1_interface);
	stepper_config(machine, 4, &barcrest_opto1_interface);
	stepper_config(machine, 5, &barcrest_opto1_interface);

	awp_reel_setup();
	state->m_current_chr_table = oldtmr_data;
}

static DRIVER_INIT (m_ccelbr)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_reel_mux=STANDARD_REEL;
	state->m_reels = 4;
	// setup 4 default 96 half step reels ///////////////////////////////////
	mpu4_config_common_reels(machine,4);

	state->m_current_chr_table = ccelbr_data;
}

static DRIVER_INIT (m_gmball)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_reel_mux=STANDARD_REEL;
	state->m_reels = 4;
	// setup 4 default 96 half step reels ///////////////////////////////////
	mpu4_config_common_reels(machine,4);

	state->m_current_chr_table = gmball_data;
}

static DRIVER_INIT (m_grtecp)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_reel_mux=FIVE_REEL_5TO8;
	state->m_reels = 5;
	state->m_lamp_extender=SMALL_CARD;
	// setup 4 default 96 half step reels with the mux board
	mpu4_config_common_reels(machine,4);
	stepper_config(machine, 4, &barcrest_reelrev_interface);
	state->m_current_chr_table = grtecp_data;
}

static DRIVER_INIT (m_blsbys)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_bwb_bank=1;
	state->m_reel_mux=FIVE_REEL_5TO8;
	state->m_reels = 5;
	stepper_config(machine, 0, &bwb_opto1_interface);
	stepper_config(machine, 1, &bwb_opto1_interface);
	stepper_config(machine, 2, &bwb_opto1_interface);
	stepper_config(machine, 3, &bwb_opto1_interface);
	stepper_config(machine, 4, &bwb_opto1_interface);
	state->m_bwb_chr_table1 = blsbys_data1;
	state->m_current_chr_table = blsbys_data;
}

static DRIVER_INIT (mpu4tst2)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_reel_mux=STANDARD_REEL;
	state->m_reels = 4;
	mpu4_config_common_reels(machine,4);
}

static DRIVER_INIT (mpu4utst)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_reel_mux=STANDARD_REEL;
	state->m_reels = 4;
	mpu4_config_common_reels(machine,4);
}

static DRIVER_INIT (connect4)
{
	mpu4_state *state = machine.driver_data<mpu4_state>();
	state->m_reels = 0; //reel-free game
	state->m_led_lamp=1;
}

static DRIVER_INIT (m_frkstn)
{
  mpu4_state *state = machine.driver_data<mpu4_state>();
  state->m_reel_mux=STANDARD_REEL;
  state->m_reels = 4;

  // setup 4 default 96 half step reels with the mux board
  mpu4_config_common_reels(machine,4);

  //This is a Crystal ROM, needs UPD chip and Project Amber's ROM swizzle.
}

/* generate a 50 Hz signal (based on an RC time) */
static TIMER_DEVICE_CALLBACK( gen_50hz )
{
	mpu4_state *state = timer.machine().driver_data<mpu4_state>();
	/* Although reported as a '50Hz' signal, the fact that both rising and
    falling edges of the pulse are used means the timer actually gives a 100Hz
    oscillating signal.*/
	state->m_signal_50hz = state->m_signal_50hz?0:1;
	timer.machine().device<pia6821_device>("pia_ic4")->ca1_w(state->m_signal_50hz);	/* signal is connected to IC4 CA1 */

	update_meters(state);//run at 100Hz to sync with PIAs
}

static ADDRESS_MAP_START( mod2_memmap, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x07ff) AM_RAM AM_SHARE("nvram")
	AM_RANGE(0x0800, 0x0810) AM_READWRITE(characteriser_r,characteriser_w)

	AM_RANGE(0x0850, 0x0850) AM_READWRITE(bankswitch_r,bankswitch_w)	/* write bank (rom page select) */

/*  AM_RANGE(0x08e0, 0x08e7) AM_READWRITE(68681_duart_r,68681_duart_w) */ //Runs hoppers

	AM_RANGE(0x0900, 0x0907) AM_DEVREADWRITE_MODERN("ptm_ic2", ptm6840_device, read, write)/* PTM6840 IC2 */

	AM_RANGE(0x0a00, 0x0a03) AM_DEVREADWRITE_MODERN("pia_ic3", pia6821_device, read, write)		/* PIA6821 IC3 */
	AM_RANGE(0x0b00, 0x0b03) AM_DEVREADWRITE_MODERN("pia_ic4", pia6821_device, read, write)		/* PIA6821 IC4 */
	AM_RANGE(0x0c00, 0x0c03) AM_DEVREADWRITE_MODERN("pia_ic5", pia6821_device, read, write)		/* PIA6821 IC5 */
	AM_RANGE(0x0d00, 0x0d03) AM_DEVREADWRITE_MODERN("pia_ic6", pia6821_device, read, write)		/* PIA6821 IC6 */
	AM_RANGE(0x0e00, 0x0e03) AM_DEVREADWRITE_MODERN("pia_ic7", pia6821_device, read, write)		/* PIA6821 IC7 */
	AM_RANGE(0x0f00, 0x0f03) AM_DEVREADWRITE_MODERN("pia_ic8", pia6821_device, read, write)		/* PIA6821 IC8 */

	AM_RANGE(0x1000, 0xffff) AM_ROMBANK("bank1")	/* 64k  paged ROM (4 pages)  */
ADDRESS_MAP_END

static ADDRESS_MAP_START( mod4_yam_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x07ff) AM_RAM AM_SHARE("nvram")

	AM_RANGE(0x0800, 0x0810) AM_READWRITE(characteriser_r,characteriser_w)

	AM_RANGE(0x0850, 0x0850) AM_WRITE(bankswitch_w)	// write bank (rom page select)

	AM_RANGE(0x0880, 0x0881) AM_DEVWRITE( "ym2413", ym2413_w )

/*  AM_RANGE(0x08e0, 0x08e7) AM_READWRITE(68681_duart_r,68681_duart_w) */ //Runs hoppers

	AM_RANGE(0x0900, 0x0907) AM_DEVREADWRITE_MODERN("ptm_ic2", ptm6840_device, read, write)/* PTM6840 IC2 */

	AM_RANGE(0x0a00, 0x0a03) AM_DEVREADWRITE_MODERN("pia_ic3", pia6821_device, read, write)		/* PIA6821 IC3 */
	AM_RANGE(0x0b00, 0x0b03) AM_DEVREADWRITE_MODERN("pia_ic4", pia6821_device, read, write)		/* PIA6821 IC4 */
	AM_RANGE(0x0c00, 0x0c03) AM_DEVREADWRITE_MODERN("pia_ic5", pia6821_device, read, write)		/* PIA6821 IC5 */
	AM_RANGE(0x0d00, 0x0d03) AM_DEVREADWRITE_MODERN("pia_ic6", pia6821_device, read, write)		/* PIA6821 IC6 */
	AM_RANGE(0x0e00, 0x0e03) AM_DEVREADWRITE_MODERN("pia_ic7", pia6821_device, read, write)		/* PIA6821 IC7 */
	AM_RANGE(0x0f00, 0x0f03) AM_DEVREADWRITE_MODERN("pia_ic8", pia6821_device, read, write)		/* PIA6821 IC8 */

	AM_RANGE(0x1000, 0xffff) AM_ROMBANK("bank1")	// 64k  paged ROM (4 pages)
ADDRESS_MAP_END

static ADDRESS_MAP_START( mod4_oki_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x07ff) AM_RAM AM_SHARE("nvram")

	AM_RANGE(0x0800, 0x0810) AM_READWRITE(characteriser_r,characteriser_w)

	AM_RANGE(0x0850, 0x0850) AM_WRITE(bankswitch_w)	// write bank (rom page select)

	AM_RANGE(0x0880, 0x0883) AM_DEVREADWRITE_MODERN("pia_ic4ss", pia6821_device, read, write)      // PIA6821 on sampled sound board

	AM_RANGE(0x08c0, 0x08c7) AM_DEVREADWRITE_MODERN("ptm_ic3ss", ptm6840_device, read, write)  // 6840PTM on sampled sound board

//  AM_RANGE(0x08e0, 0x08e7) AM_READWRITE(68681_duart_r,68681_duart_w) //Runs hoppers

	AM_RANGE(0x0900, 0x0907) AM_DEVREADWRITE_MODERN("ptm_ic2", ptm6840_device, read, write)/* PTM6840 IC2 */

	AM_RANGE(0x0a00, 0x0a03) AM_DEVREADWRITE_MODERN("pia_ic3", pia6821_device, read, write)		/* PIA6821 IC3 */
	AM_RANGE(0x0b00, 0x0b03) AM_DEVREADWRITE_MODERN("pia_ic4", pia6821_device, read, write)		/* PIA6821 IC4 */
	AM_RANGE(0x0c00, 0x0c03) AM_DEVREADWRITE_MODERN("pia_ic5", pia6821_device, read, write)		/* PIA6821 IC5 */
	AM_RANGE(0x0d00, 0x0d03) AM_DEVREADWRITE_MODERN("pia_ic6", pia6821_device, read, write)		/* PIA6821 IC6 */
	AM_RANGE(0x0e00, 0x0e03) AM_DEVREADWRITE_MODERN("pia_ic7", pia6821_device, read, write)		/* PIA6821 IC7 */
	AM_RANGE(0x0f00, 0x0f03) AM_DEVREADWRITE_MODERN("pia_ic8", pia6821_device, read, write)		/* PIA6821 IC8 */

	AM_RANGE(0x1000, 0xffff) AM_ROMBANK("bank1")	// 64k  paged ROM (4 pages)
ADDRESS_MAP_END

static ADDRESS_MAP_START( mpu4_bwb_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x07ff) AM_RAM AM_SHARE("nvram")

	AM_RANGE(0x0800, 0x083F) AM_READWRITE(bwb_characteriser_r,bwb_characteriser_w)// Game selects a random value within this range

	AM_RANGE(0x0850, 0x0850) AM_WRITE(bankswitch_w)	// write bank (rom page select)

	AM_RANGE(0x0858, 0x0858) AM_WRITE(bankswitch_w)	// write bank (rom page select)
	AM_RANGE(0x0878, 0x0878) AM_WRITE(bankset_w)	// write bank (rom page select)
	AM_RANGE(0x0880, 0x0883) AM_DEVREADWRITE_MODERN("pia_ic4ss", pia6821_device, read, write)      // PIA6821 on sampled sound board

	AM_RANGE(0x08c0, 0x08c7) AM_DEVREADWRITE_MODERN("ptm_ic3ss", ptm6840_device, read, write)  // 6840PTM on sampled sound board

//  AM_RANGE(0x08e0, 0x08e7) AM_READWRITE(68681_duart_r,68681_duart_w) //Runs hoppers

	AM_RANGE(0x0900, 0x0907) AM_DEVREADWRITE_MODERN("ptm_ic2", ptm6840_device, read, write)/* PTM6840 IC2 */

	AM_RANGE(0x0a00, 0x0a03) AM_DEVREADWRITE_MODERN("pia_ic3", pia6821_device, read, write)		/* PIA6821 IC3 */
	AM_RANGE(0x0b00, 0x0b03) AM_DEVREADWRITE_MODERN("pia_ic4", pia6821_device, read, write)		/* PIA6821 IC4 */
	AM_RANGE(0x0c00, 0x0c03) AM_DEVREADWRITE_MODERN("pia_ic5", pia6821_device, read, write)		/* PIA6821 IC5 */
	AM_RANGE(0x0d00, 0x0d03) AM_DEVREADWRITE_MODERN("pia_ic6", pia6821_device, read, write)		/* PIA6821 IC6 */
	AM_RANGE(0x0e00, 0x0e03) AM_DEVREADWRITE_MODERN("pia_ic7", pia6821_device, read, write)		/* PIA6821 IC7 */
	AM_RANGE(0x0f00, 0x0f03) AM_DEVREADWRITE_MODERN("pia_ic8", pia6821_device, read, write)		/* PIA6821 IC8 */

	AM_RANGE(0x1000, 0xffff) AM_ROMBANK("bank1")	// 64k  paged ROM (4 pages)
ADDRESS_MAP_END

static ADDRESS_MAP_START( mpu4_crystal_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x07ff) AM_RAM AM_SHARE("nvram")
	AM_RANGE(0x0850, 0x0850) AM_WRITE(bankswitch_w) // write bank (rom page select)
	AM_RANGE(0x0858, 0x0858) AM_WRITE(bankswitch_w) // write bank (rom page select)
	AM_RANGE(0x0878, 0x0878) AM_WRITE(bankset_w)    // write bank (rom page select)
//  AM_RANGE(0x08e0, 0x08e7) AM_READWRITE(68681_duart_r,68681_duart_w) //Runs hoppers
	AM_RANGE(0x0900, 0x0907) AM_DEVREADWRITE_MODERN("ptm_ic2", ptm6840_device, read, write)/* PTM6840 IC2 */
	AM_RANGE(0x0a00, 0x0a03) AM_DEVREADWRITE_MODERN("pia_ic3", pia6821_device, read, write)     /* PIA6821 IC3 */
	AM_RANGE(0x0b00, 0x0b03) AM_DEVREADWRITE_MODERN("pia_ic4", pia6821_device, read, write)     /* PIA6821 IC4 */
	AM_RANGE(0x0c00, 0x0c03) AM_DEVREADWRITE_MODERN("pia_ic5", pia6821_device, read, write)     /* PIA6821 IC5 */
	AM_RANGE(0x0d00, 0x0d03) AM_DEVREADWRITE_MODERN("pia_ic6", pia6821_device, read, write)     /* PIA6821 IC6 */
	AM_RANGE(0x0e00, 0x0e03) AM_DEVREADWRITE_MODERN("pia_ic7", pia6821_device, read, write)     /* PIA6821 IC7 */
	AM_RANGE(0x0f00, 0x0f03) AM_DEVREADWRITE_MODERN("pia_ic8", pia6821_device, read, write)     /* PIA6821 IC8 */
	AM_RANGE(0x1000, 0xffff) AM_ROMBANK("bank1")    // 64k  paged ROM (4 pages)
ADDRESS_MAP_END


static ADDRESS_MAP_START( dutch_memmap, AS_PROGRAM, 8 )

	AM_RANGE(0x0000, 0x07ff) AM_RAM AM_SHARE("nvram")

//  AM_RANGE(0x0800, 0x0810) AM_READWRITE(characteriser_r,characteriser_w)

	AM_RANGE(0x0850, 0x0850) AM_WRITE(bankswitch_w)	// write bank (rom page select)
	AM_RANGE(0x0880, 0x0883) AM_DEVREADWRITE_MODERN("pia_ic4ss", pia6821_device, read, write)      // PIA6821 on sampled sound board

	AM_RANGE(0x08c0, 0x08c7) AM_DEVREADWRITE_MODERN("ptm_ic3ss", ptm6840_device, read, write)  // 6840PTM on sampled sound board

//  AM_RANGE(0x08e0, 0x08e7) AM_READWRITE(68681_duart_r,68681_duart_w) //Runs hoppers

	AM_RANGE(0x0900, 0x0907) AM_DEVREADWRITE_MODERN("ptm_ic2", ptm6840_device, read, write)/* PTM6840 IC2 */

	AM_RANGE(0x0a00, 0x0a03) AM_DEVREADWRITE_MODERN("pia_ic3", pia6821_device, read, write)		/* PIA6821 IC3 */
	AM_RANGE(0x0b00, 0x0b03) AM_DEVREADWRITE_MODERN("pia_ic4", pia6821_device, read, write)		/* PIA6821 IC4 */
	AM_RANGE(0x0c00, 0x0c03) AM_DEVREADWRITE_MODERN("pia_ic5", pia6821_device, read, write)		/* PIA6821 IC5 */
	AM_RANGE(0x0d00, 0x0d03) AM_DEVREADWRITE_MODERN("pia_ic6", pia6821_device, read, write)		/* PIA6821 IC6 */
	AM_RANGE(0x0e00, 0x0e03) AM_DEVREADWRITE_MODERN("pia_ic7", pia6821_device, read, write)		/* PIA6821 IC7 */
	AM_RANGE(0x0f00, 0x0f03) AM_DEVREADWRITE_MODERN("pia_ic8", pia6821_device, read, write)		/* PIA6821 IC8 */

	AM_RANGE(0x1000, 0xffff) AM_ROMBANK("bank1")	// 64k paged ROM (4 pages)
ADDRESS_MAP_END

static const ay8910_interface ay8910_config =
{
	AY8910_SINGLE_OUTPUT,
	{820,0,0},
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL,
	DEVCB_NULL
};


/* machine driver for MOD 2 board */
static MACHINE_CONFIG_START( mpu4mod2, mpu4_state )

	MCFG_MACHINE_START(mpu4mod2)
	MCFG_MACHINE_RESET(mpu4)
	MCFG_CPU_ADD("maincpu", M6809, MPU4_MASTER_CLOCK/4)
	MCFG_CPU_PROGRAM_MAP(mod2_memmap)

	MCFG_TIMER_ADD_PERIODIC("50hz",gen_50hz, attotime::from_hz(100))

	/* 6840 PTM */
	MCFG_PTM6840_ADD("ptm_ic2", ptm_ic2_intf)

	MCFG_PIA6821_ADD("pia_ic3", pia_ic3_intf)
	MCFG_PIA6821_ADD("pia_ic4", pia_ic4_intf)
	MCFG_PIA6821_ADD("pia_ic5", pia_ic5_intf)
	MCFG_PIA6821_ADD("pia_ic6", pia_ic6_intf)
	MCFG_PIA6821_ADD("pia_ic7", pia_ic7_intf)
	MCFG_PIA6821_ADD("pia_ic8", pia_ic8_intf)

	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("ay8913",AY8913, MPU4_MASTER_CLOCK/4)
	MCFG_SOUND_CONFIG(ay8910_config)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)

	MCFG_NVRAM_ADD_0FILL("nvram")

	MCFG_DEFAULT_LAYOUT(layout_mpu4)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( mod4yam, mpu4mod2 )
	MCFG_MACHINE_START(mpu4mod4)

	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(mod4_yam_map)

	MCFG_DEVICE_REMOVE("ay8913")
	MCFG_SOUND_ADD("ym2413", YM2413, MPU4_MASTER_CLOCK/4)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.5)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( mod4oki, mpu4mod2 )
	MCFG_MACHINE_START(mpu4mod4)

	MCFG_PTM6840_ADD("ptm_ic3ss", ptm_ic3ss_intf)
	MCFG_PIA6821_ADD("pia_ic4ss", pia_ic4ss_intf)

	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(mod4_oki_map)

	MCFG_DEVICE_REMOVE("ay8913")
	MCFG_SOUND_ADD("msm6376", OKIM6376, 3000000) //Wrong, needs to be 64 KHz, can also be 85430 at 10.5KHz and 128000 at 16KHz
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( mpu4dutch, mod4oki )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(dutch_memmap)				// setup read and write memorymap
	MCFG_MACHINE_START(mpu4dutch)					// main mpu4 board initialisation
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( bwboki, mod4oki )
	MCFG_CPU_MODIFY("maincpu")
	MCFG_CPU_PROGRAM_MAP(mpu4_bwb_map)				// setup read and write memorymap
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED(mpu4crys, mpu4mod2 )
  MCFG_CPU_MODIFY("maincpu")
  MCFG_CPU_PROGRAM_MAP(mpu4_crystal_map)              // setup read and write memorymap

  MCFG_SOUND_ADD("upd", UPD7759, UPD7759_STANDARD_CLOCK)
  MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MACHINE_CONFIG_END



ROM_START( m_oldtmr )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "dot11.bin",  0x00000, 0x10000,  CRC(da095666) SHA1(bc7654dc9da1f830a43f925db8079f27e18bb61e))

	ROM_REGION( 0x200000, "msm6376", 0 )
	ROM_LOAD( "snd.p1",  0x000000, 0x080000,  NO_DUMP )
	ROM_LOAD( "snd.p2",  0x080000, 0x080000,  NO_DUMP )
ROM_END

ROM_START( m_ccelbr )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD( "cels.p1",  0x00000, 0x10000,  CRC(19d2162f) SHA1(24fe435809352725e7614c32e2184142f355298e))
ROM_END

ROM_START( m_gmball )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASE00  )
	ROM_LOAD( "gbbx.p1",	0x0000, 0x10000,  CRC(0b5adcd0) SHA1(1a198bd4a1e7d6bf4cf025c43d35aaef351415fc))
ROM_END

ROM_START( connect4 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASE00  )
	ROM_LOAD( "connect4.p2",  0x8000, 0x4000,  CRC(6090633c) SHA1(0cd2725a235bf93cfe94f2ca648d5fccb87b8e5c) )
	ROM_LOAD( "connect4.p1",  0xC000, 0x4000,  CRC(b1af50c0) SHA1(7c9645ea378f0857b849ca24a239d9114f62da7f) )
ROM_END

ROM_START( mpu4utst )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASE00  )
	ROM_LOAD( "ut4.p1",  0xC000, 0x4000,  CRC(086dc325) SHA1(923caeb61347ac9d3e6bcec45998ddf04b2c8ffd))
ROM_END

ROM_START( mpu4tst2 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASE00  )
	ROM_LOAD( "ut2.p1",  0xE000, 0x2000,  CRC(f7fb6575) SHA1(f7961cbd0801b9561d8cd2d23081043d733e1902))
ROM_END

ROM_START( mpu4met0 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASE00  )
	ROM_LOAD( "meter-zero.p1",  0x8000, 0x8000,  CRC(e74297e5) SHA1(49a2cc85eda14199975ec37a794b685c839d3ab9))
ROM_END

ROM_START( m_grtecp )
	ROM_REGION( 0x10000, "maincpu", 0 )
	ROM_LOAD("an2k.p1",  0x00000, 0x10000,  CRC(c0886dff) SHA1(ef2b509fde05ef4ef055a09275afc9e153f50efc))

	ROM_REGION( 0x200000, "msm6376", 0 )
	ROM_LOAD( "an2snd.p1",  0x000000, 0x080000,  CRC(5394e9ae) SHA1(86ccd8531fc87f34d3c5482ba7e5a2c06ea69491) )
	ROM_LOAD( "an2snd.p2",  0x080000, 0x080000,  CRC(109ace1f) SHA1(9f0e8065186beb61ed50fea834de2d91e68db953) )
ROM_END

ROM_START( m_blsbys )
	ROM_REGION( 0x80000, "maincpu", 0 )
	ROM_LOAD("bbprog.bin",  0x00000, 0x20000,  CRC(c262cfda) SHA1(f004895e0dd3f8420683927915554e19e41bd20b))
	ROM_RELOAD(0x40000,0x20000)

	ROM_REGION( 0x200000, "msm6376", 0 )
	ROM_LOAD( "bbsnd.p1",  0x000000, 0x080000,  CRC(715c9e95) SHA1(6a0c9c63e56cfc21bf77cf29c1b844b8e0844c1e) )
	ROM_LOAD( "bbsnd.p2",  0x080000, 0x080000,  CRC(594a87f8) SHA1(edfef7d08fab41fb5814c92930f08a565371eae1) )
ROM_END

ROM_START( m_frkstn )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASE00  )
	ROM_LOAD( "fr1.536",  0x8000, 0x8000,  CRC(422b7209) SHA1(3c3f942d375a83d2470467651bca20f0feabdd3b))

	ROM_REGION( 0x40000, "upd", 0 )
	ROM_LOAD("fr1snd.bin",	0x00000, 0x40000, CRC(2d77bbde) SHA1(0397ede538e913dc2972e260589022564fcd8fe4))
ROM_END

//    year,  name,    parent,  machine,  input,   init,     monitor,company,        fullname,                           flags
GAME( 198?,  m_oldtmr,0,      mpu4dutch,mpu4,	  m_oldtmr, ROT0,   "Barcrest",		 "Old Timer",						GAME_NOT_WORKING|GAME_NO_SOUND|GAME_REQUIRES_ARTWORK )
GAME( 198?,  m_ccelbr,0,      mpu4mod2, mpu4,	  m_ccelbr, ROT0,   "Barcrest",		 "Club Celebration",				GAME_NOT_WORKING|GAME_REQUIRES_ARTWORK )
GAMEL(198?,  m_gmball,0,      mod4yam,  gamball,  m_gmball, ROT0, "Barcrest",       "Gamball",							GAME_REQUIRES_ARTWORK|GAME_MECHANICAL,layout_gamball )//Mechanical ball launcher
GAMEL(198?,  m_grtecp,0,      mod4oki,  mpu4,	  m_grtecp, ROT0,   "Barcrest",		 "Andy's Great Escape",				GAME_NOT_WORKING|GAME_REQUIRES_ARTWORK,layout_mpu4ext )//5 reel meter mux
GAME(199?,   m_blsbys,0,	  bwboki,   mpu4,	  m_blsbys, ROT0,   "Barcrest",		 "Blues Boys (Version 6)",			GAME_NOT_WORKING|GAME_REQUIRES_ARTWORK )
GAME(199?,   m_frkstn,0,    mpu4crys, mpu4,     m_frkstn, ROT0,   "Crystal Gaming","Frank 'n' Stein (unencrypted)",   GAME_NOT_WORKING|GAME_REQUIRES_ARTWORK|GAME_NO_SOUND )//hardware not connected

//SWP
GAMEL(1989?,connect4,        0, mpu4mod2,   connect4,   connect4,   ROT0, "Dolbeck Systems","Connect 4",GAME_IMPERFECT_GRAPHICS|GAME_REQUIRES_ARTWORK,layout_connect4 )

//Diagnostic ROMs
GAME( 198?, mpu4utst,        0, mpu4mod2,   mpu4,       mpu4utst,   ROT0, "Barcrest","MPU4 Unit Test (Program 4)",GAME_MECHANICAL )
GAME( 198?, mpu4tst2,        0, mpu4mod2,   mpu4,       mpu4tst2,   ROT0, "Barcrest","MPU4 Unit Test (Program 2)",GAME_MECHANICAL )
GAME( 198?, mpu4met0,        0, mpu4mod2,   mpu4,       0,          ROT0, "Barcrest","MPU4 Meter Clear ROM",GAME_MECHANICAL )

#include "drivers/mpu4drvr.c"