summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/hp9845.cpp
blob: b6cff8a6343d1ef3316aaa159972a71b439382a6 (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
// license:BSD-3-Clause
// copyright-holders:Curt Coder, F. Ulivi
/*

    HP 9845

    http://www.hp9845.net/

*/
// **************************
// Driver for HP 9845B system
// **************************
//
// What's in:
// - Emulation of both 5061-3001 CPUs
// - LPU & PPU ROMs
// - LPU & PPU RAMs
// - Text mode screen
// - Graphic screen
// - Keyboard
// - T15 tape drive
// - Software list to load optional ROMs
// - Beeper
// - Correct character generator ROMs (a huge "thank you" to Ansgar Kueckes for the dumps!)
// What's not yet in:
// - Better naming of tape drive image (it's now "magt", should be "t15")
// - Better documentation of this file
// What's wrong:
// - Speed, as usual

#include "emu.h"
#include "includes/hp9845.h"
#include "softlist.h"
#include "bus/hp_optroms/hp_optrom.h"

#define BIT_MASK(n) (1U << (n))

// Macros to clear/set single bits
#define BIT_CLR(w , n)  ((w) &= ~BIT_MASK(n))
#define BIT_SET(w , n)  ((w) |= BIT_MASK(n))

// Base address of video buffer
#define VIDEO_BUFFER_BASE       0x17000

// For test "B" of alpha video to succeed this must be < 234
// Basically "B" test is designed to intentionally prevent line buffer to be filled so that display is blanked
// from 2nd row on. This in turn prevents "BAD" text to be visible on screen.
#define MAX_WORD_PER_ROW        220

// Constants of alpha video
#define VIDEO_PIXEL_CLOCK       20849400
#define VIDEO_CHAR_WIDTH        9
#define VIDEO_CHAR_HEIGHT       15
#define VIDEO_CHAR_COLUMNS      80
#define VIDEO_CHAR_TOTAL        99
#define VIDEO_CHAR_ROWS         25
#define VIDEO_ROWS_TOTAL        26
#define VIDEO_HBSTART           (VIDEO_CHAR_WIDTH * VIDEO_CHAR_COLUMNS)
#define VIDEO_HTOTAL            (VIDEO_CHAR_WIDTH * VIDEO_CHAR_TOTAL)
#define VIDEO_VTOTAL            (VIDEO_CHAR_HEIGHT * VIDEO_ROWS_TOTAL)
#define VIDEO_ACTIVE_SCANLINES  (VIDEO_CHAR_HEIGHT * VIDEO_CHAR_ROWS)

// Constants of graphic video
// Pixel clock is 20.8494 MHz (the same as alpha video)
// Horizontal counter counts in [1..727] range
// Vertical counter counts in [34..511] range
#define GVIDEO_HTOTAL           727
#define GVIDEO_HCNT_OFF         1       // Actual start value of h counter
#define GVIDEO_HBEND            (69 - GVIDEO_HCNT_OFF)
#define GVIDEO_HPIXELS          560
#define GVIDEO_HBSTART          (GVIDEO_HBEND + GVIDEO_HPIXELS)
#define GVIDEO_VTOTAL           478
#define GVIDEO_VCNT_OFF         34      // Actual start value of v counter
#define GVIDEO_VBEND            (50 - GVIDEO_VCNT_OFF)
#define GVIDEO_VPIXELS          455
#define GVIDEO_VBSTART          (GVIDEO_VBEND + GVIDEO_VPIXELS)
#define GVIDEO_MEM_SIZE         16384
#define GVIDEO_ADDR_MASK        (GVIDEO_MEM_SIZE - 1)
#define GVIDEO_PA               13

#define T15_PA                  15

#define KEY_SCAN_OSCILLATOR     327680

class hp9845_state : public driver_device
{
public:
	hp9845_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag)
	{ }

	uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
};

static INPUT_PORTS_START( hp9845 )
INPUT_PORTS_END

uint32_t hp9845_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	return 0;
}

static INPUT_PORTS_START(hp9845b)
		// Keyboard is arranged in a 8 x 16 matrix. Of the 128 possible positions, 118 are used.
	// Keys are mapped on bit b of KEYn
	// where b = (row & 1) << 4 + column, n = row >> 1
	// column = [0..15]
	// row = [0..7]
	PORT_START("KEY0")
	PORT_BIT(BIT_MASK(0)  , IP_ACTIVE_HIGH , IPT_UNUSED)    // N/U
	PORT_BIT(BIT_MASK(1)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("Print All")  // Print All
	PORT_BIT(BIT_MASK(2)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP+")        // KP +
	PORT_BIT(BIT_MASK(3)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP,")        // KP ,
	PORT_BIT(BIT_MASK(4)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP.")        // KP .
		PORT_BIT(BIT_MASK(5)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP0")        // KP 0
	PORT_BIT(BIT_MASK(6)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_F12)  PORT_NAME("Execute")    // Execute
	PORT_BIT(BIT_MASK(7)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_F11)  PORT_NAME("Cont")       // Cont
	PORT_BIT(BIT_MASK(8)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))        // Right
	PORT_BIT(BIT_MASK(9)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')  // Space
	PORT_BIT(BIT_MASK(10)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')  // /
	PORT_BIT(BIT_MASK(11)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')  // <
	PORT_BIT(BIT_MASK(12)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_N)     PORT_CHAR('n') PORT_CHAR('N')  // N
	PORT_BIT(BIT_MASK(13)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_V)     PORT_CHAR('v') PORT_CHAR('V')  // V
	PORT_BIT(BIT_MASK(14)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_X)     PORT_CHAR('x') PORT_CHAR('X')  // X
	PORT_BIT(BIT_MASK(15)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_LSHIFT)    PORT_CHAR(UCHAR_SHIFT_1)   // Shift
	PORT_BIT(BIT_MASK(16)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // N/U
	PORT_BIT(BIT_MASK(17)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("Auto start") // Auto Start
	PORT_BIT(BIT_MASK(18)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP-")        // KP -
	PORT_BIT(BIT_MASK(19)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP3")        // KP 3
	PORT_BIT(BIT_MASK(20)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP2")        // KP 2
	PORT_BIT(BIT_MASK(21)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP1")        // KP 1
	PORT_BIT(BIT_MASK(22)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // N/U
	PORT_BIT(BIT_MASK(23)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))  // Left
	PORT_BIT(BIT_MASK(24)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // Repeat
	PORT_BIT(BIT_MASK(25)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))  // Down
	PORT_BIT(BIT_MASK(26)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // N/U
	PORT_BIT(BIT_MASK(27)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')   // >
	PORT_BIT(BIT_MASK(28)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_M)     PORT_CHAR('m') PORT_CHAR('M')  // M
	PORT_BIT(BIT_MASK(29)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_B)     PORT_CHAR('b') PORT_CHAR('B')  // B
	PORT_BIT(BIT_MASK(30)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_C)     PORT_CHAR('c') PORT_CHAR('C')  // C
	PORT_BIT(BIT_MASK(31)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_Z)     PORT_CHAR('z') PORT_CHAR('Z')  // Z

	PORT_START("KEY1")
	PORT_BIT(BIT_MASK(0)  , IP_ACTIVE_HIGH , IPT_UNUSED)    // N/U
	PORT_BIT(BIT_MASK(1)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_INSERT)       PORT_NAME("INSCHAR")    // Ins Char
	PORT_BIT(BIT_MASK(2)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP*")        // KP *
	PORT_BIT(BIT_MASK(3)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP6")        // KP 6
	PORT_BIT(BIT_MASK(4)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP5")        // KP 5
	PORT_BIT(BIT_MASK(5)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP4")        // KP 4
	PORT_BIT(BIT_MASK(6)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP=")        // KP =
	PORT_BIT(BIT_MASK(7)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_F10)  PORT_NAME("Pause")      // Pause
	PORT_BIT(BIT_MASK(8)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_UP)   PORT_CHAR(UCHAR_MAMEKEY(UP))    // Up
	PORT_BIT(BIT_MASK(9)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_ENTER)        PORT_CHAR(13)   // Store
	PORT_BIT(BIT_MASK(10)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON)     PORT_CHAR(';') PORT_CHAR(':')      // :
	PORT_BIT(BIT_MASK(11)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_K)     PORT_CHAR('k') PORT_CHAR('K')  // K
	PORT_BIT(BIT_MASK(12)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_H)     PORT_CHAR('h') PORT_CHAR('H')  // H
	PORT_BIT(BIT_MASK(13)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F)     PORT_CHAR('f') PORT_CHAR('F')  // F
	PORT_BIT(BIT_MASK(14)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_S)     PORT_CHAR('s') PORT_CHAR('S')  // S
	PORT_BIT(BIT_MASK(15)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // N/U
	PORT_BIT(BIT_MASK(16)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // N/U
	PORT_BIT(BIT_MASK(17)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("INSLN")      // Ins Ln
	PORT_BIT(BIT_MASK(18)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP/")        // KP /
	PORT_BIT(BIT_MASK(19)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP9")        // KP 9
	PORT_BIT(BIT_MASK(20)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP8")        // KP 8
	PORT_BIT(BIT_MASK(21)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("KP7")        // KP 7
	PORT_BIT(BIT_MASK(22)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("Result")     // Result
	PORT_BIT(BIT_MASK(23)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F9)   PORT_NAME("Run")        // Run
	PORT_BIT(BIT_MASK(24)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // N/U
	PORT_BIT(BIT_MASK(25)  , IP_ACTIVE_HIGH , IPT_UNUSED)   // N/U
	PORT_BIT(BIT_MASK(26)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"') // "
	PORT_BIT(BIT_MASK(27)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_L)     PORT_CHAR('l') PORT_CHAR('L')  // L
	PORT_BIT(BIT_MASK(28)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_J)     PORT_CHAR('j') PORT_CHAR('J')  // J
	PORT_BIT(BIT_MASK(29)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_G)     PORT_CHAR('g') PORT_CHAR('G')  // G
	PORT_BIT(BIT_MASK(30)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_D)     PORT_CHAR('d') PORT_CHAR('D')  // D
	PORT_BIT(BIT_MASK(31)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_A)     PORT_CHAR('a') PORT_CHAR('A')  // A

	PORT_START("KEY2")
	PORT_BIT(BIT_MASK(0)  , IP_ACTIVE_HIGH , IPT_UNUSED)    // N/U
	PORT_BIT(BIT_MASK(1)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("DELLN")      // Del Ln
	PORT_BIT(BIT_MASK(2)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP^")        // KP ^
	PORT_BIT(BIT_MASK(3)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP)")        // KP )
	PORT_BIT(BIT_MASK(4)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KP(")        // KP (
	PORT_BIT(BIT_MASK(5)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("KPE")        // KP E
	PORT_BIT(BIT_MASK(6)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("Clear line") // Clear Line
	PORT_BIT(BIT_MASK(7)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_F8)   PORT_NAME("Stop")       // Stop
	PORT_BIT(BIT_MASK(8)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')      // |
	PORT_BIT(BIT_MASK(9)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_CODE(KEYCODE_CLOSEBRACE)   PORT_CHAR(']') PORT_CHAR('}')   // ]
	PORT_BIT(BIT_MASK(10)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_P)     PORT_CHAR('p') PORT_CHAR('P')  // P
	PORT_BIT(BIT_MASK(11)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_I)     PORT_CHAR('i') PORT_CHAR('I')  // I
	PORT_BIT(BIT_MASK(12)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_Y)     PORT_CHAR('y') PORT_CHAR('Y')  // Y
	PORT_BIT(BIT_MASK(13)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_R)     PORT_CHAR('r') PORT_CHAR('R')  // R
	PORT_BIT(BIT_MASK(14)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_W)     PORT_CHAR('w') PORT_CHAR('W')  // W
	PORT_BIT(BIT_MASK(15)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL)  PORT_CHAR(UCHAR_SHIFT_2)   // Control
	PORT_BIT(BIT_MASK(16)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("Typwtr")     // Typwtr
	PORT_BIT(BIT_MASK(17)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_DEL)  PORT_NAME("DELCHAR")    // Del Char
	PORT_BIT(BIT_MASK(18)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_PGDN) PORT_NAME("ROLLDOWN")   // Roll down
	PORT_BIT(BIT_MASK(19)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_PGUP) PORT_NAME("ROLLUP")     // Roll up
	PORT_BIT(BIT_MASK(20)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_HOME) PORT_NAME("HOME")       // Home
	PORT_BIT(BIT_MASK(21)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("Clr to end") // Clr to end
	PORT_BIT(BIT_MASK(22)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("Clear")      // Clear
	PORT_BIT(BIT_MASK(23)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE)     PORT_CHAR('`') PORT_CHAR('~')      // ~
	PORT_BIT(BIT_MASK(24)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)       // BS
	PORT_BIT(BIT_MASK(25)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS)    PORT_CHAR('=') PORT_CHAR('+')      // +
	PORT_BIT(BIT_MASK(26)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')      // [
	PORT_BIT(BIT_MASK(27)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_O)     PORT_CHAR('o') PORT_CHAR('O')  // O
	PORT_BIT(BIT_MASK(28)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_U)     PORT_CHAR('u') PORT_CHAR('U')  // U
	PORT_BIT(BIT_MASK(29)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_T)     PORT_CHAR('t') PORT_CHAR('T')  // T
	PORT_BIT(BIT_MASK(30)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_E)     PORT_CHAR('e') PORT_CHAR('E')  // E
	PORT_BIT(BIT_MASK(31)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_Q)     PORT_CHAR('q') PORT_CHAR('Q')  // Q

	PORT_START("KEY3")
	PORT_BIT(BIT_MASK(0)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("Tab set")    // Tab set
	PORT_BIT(BIT_MASK(1)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("Recall")     // Recall
	PORT_BIT(BIT_MASK(2)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K15")        // K15
	PORT_BIT(BIT_MASK(3)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K14")        // K14
	PORT_BIT(BIT_MASK(4)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K13")        // K13
	PORT_BIT(BIT_MASK(5)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K12")        // K12
	PORT_BIT(BIT_MASK(6)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K11")        // K11
	PORT_BIT(BIT_MASK(7)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K10")        // K10
		PORT_BIT(BIT_MASK(8)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K9")         // K9
	PORT_BIT(BIT_MASK(9)  , IP_ACTIVE_HIGH , IPT_KEYBOARD)  PORT_NAME("K8")         // K8
	PORT_BIT(BIT_MASK(10)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_0)     PORT_CHAR('0') // 0
	PORT_BIT(BIT_MASK(11)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_8)     PORT_CHAR('8') PORT_CHAR('(')  // 8
	PORT_BIT(BIT_MASK(12)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_6)     PORT_CHAR('6') PORT_CHAR('&')  // 6
	PORT_BIT(BIT_MASK(13)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_4)     PORT_CHAR('4') PORT_CHAR('$')  // 4
	PORT_BIT(BIT_MASK(14)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_2)     PORT_CHAR('2') PORT_CHAR('"')  // 2
	PORT_BIT(BIT_MASK(15)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB)   PORT_CHAR('\t')        // Tab
	PORT_BIT(BIT_MASK(16)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("Tab clr")    // Tab clr
		PORT_BIT(BIT_MASK(17)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_NAME("Step")  // Step
	PORT_BIT(BIT_MASK(18)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F7)   PORT_NAME("K7") // K7
	PORT_BIT(BIT_MASK(19)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F6)   PORT_NAME("K6") // K6
	PORT_BIT(BIT_MASK(20)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F5)   PORT_NAME("K5") // K5
		PORT_BIT(BIT_MASK(21)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F4)   PORT_NAME("K4") // K4
		PORT_BIT(BIT_MASK(22)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F3)   PORT_NAME("K3") // K3
	PORT_BIT(BIT_MASK(23)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F2)   PORT_NAME("K2") // K2
	PORT_BIT(BIT_MASK(24)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_F1)   PORT_NAME("K1") // K1
	PORT_BIT(BIT_MASK(25)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC)  PORT_NAME("K0") // K0
	PORT_BIT(BIT_MASK(26)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS)     PORT_CHAR('-') PORT_CHAR('_')      // _
	PORT_BIT(BIT_MASK(27)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_9)     PORT_CHAR('9') PORT_CHAR(')')  // 9
	PORT_BIT(BIT_MASK(28)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_7)     PORT_CHAR('7') PORT_CHAR('\'') // 7
	PORT_BIT(BIT_MASK(29)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_5)     PORT_CHAR('5') PORT_CHAR('%')  // 5
	PORT_BIT(BIT_MASK(30)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_3)     PORT_CHAR('3') PORT_CHAR('#')  // 3
	PORT_BIT(BIT_MASK(31)  , IP_ACTIVE_HIGH , IPT_KEYBOARD) PORT_CODE(KEYCODE_1)     PORT_CHAR('1') PORT_CHAR('!')  // 1

INPUT_PORTS_END

hp9845b_state::hp9845b_state(const machine_config &mconfig, device_type type, const char *tag) :
			  driver_device(mconfig, type, tag),
			  m_lpu(*this , "lpu"),
			  m_ppu(*this , "ppu"),
			  m_screen(*this , "screen"),
			  m_palette(*this , "palette"),
			  m_gv_timer(*this , "gv_timer"),
			  m_io_key0(*this , "KEY0"),
			  m_io_key1(*this , "KEY1"),
			  m_io_key2(*this , "KEY2"),
			  m_io_key3(*this , "KEY3"),
			  m_t15(*this , "t15"),
			  m_beeper(*this , "beeper"),
			  m_beep_timer(*this , "beep_timer"),
			  m_io_slot0(*this , "slot0")
{
}

uint32_t hp9845b_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
		if (m_graphic_sel) {
				copybitmap(bitmap, m_bitmap, 0, 0, GVIDEO_HBEND, GVIDEO_VBEND, cliprect);
		} else {
				copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect);
		}

	return 0;
}

void hp9845b_state::machine_start()
{
	machine().first_screen()->register_screen_bitmap(m_bitmap);

		m_chargen = memregion("chargen")->base();

	m_optional_chargen = memregion("optional_chargen")->base();

				m_graphic_mem.resize(GVIDEO_MEM_SIZE);
}

void hp9845b_state::device_reset()
{
	// FLG & STS are to be reset before sub-devices,
	// because the latter may set the former in their own reset functions
	m_flg_status = 0;
	m_sts_status = 0;
}

void hp9845b_state::machine_reset()
{
	m_lpu->halt_w(1);
	m_ppu->halt_w(0);

	// Some sensible defaults
	m_video_mar = VIDEO_BUFFER_BASE;
	m_video_load_mar = false;
	m_video_first_mar = false;
	m_video_byte_idx = false;
	m_video_attr = 0;
	m_video_buff_idx = false;
	m_video_blanked = false;
	m_graphic_sel = false;
	m_gv_fsm_state = GV_STAT_RESET;
	m_gv_int_en = false;
	m_gv_dma_en = false;

	m_irl_pending = 0;
	m_irh_pending = 0;
	m_pa = 0;

	sts_w(GVIDEO_PA , true);

	memset(&m_kb_state[ 0 ] , 0 , sizeof(m_kb_state));
	m_kb_scancode = 0x7f;
	m_kb_status = 0;

	m_beeper->set_state(0);

	logerror("STS=%04x FLG=%04x\n" , m_sts_status , m_flg_status);
}

void hp9845b_state::set_video_mar(uint16_t mar)
{
		m_video_mar = (mar & 0xfff) | VIDEO_BUFFER_BASE;
}

void hp9845b_state::video_fill_buff(bool buff_idx)
{
		unsigned char_idx = 0;
		unsigned iters = 0;
		uint8_t byte;
		address_space& prog_space = m_ppu->space(AS_PROGRAM);

		m_video_buff[ buff_idx ].full = false;

		while (1) {
				if (!m_video_byte_idx) {
						if (iters++ >= MAX_WORD_PER_ROW) {
								// Limit on accesses per row reached
								break;
						}
						m_video_word = prog_space.read_word(m_video_mar << 1);
						if (m_video_load_mar) {
								// Load new address into MAR after start of a new frame or NWA instruction
														if (m_video_first_mar) {
																set_graphic_mode(!BIT(m_video_word , 15));
																m_video_first_mar = false;
														}
								set_video_mar(~m_video_word);
								m_video_load_mar = false;
								continue;
						} else {
								// Read normal word from frame buffer, start parsing at MSB
								set_video_mar(m_video_mar + 1);
								byte = (uint8_t)(m_video_word >> 8);
								m_video_byte_idx = true;
						}
				} else {
						// Parse LSB
						byte = (uint8_t)(m_video_word & 0xff);
						m_video_byte_idx = false;
				}
				if ((byte & 0xc0) == 0x80) {
						// Attribute command
						m_video_attr = byte & 0x1f;
				} else if ((byte & 0xc1) == 0xc0) {
						// New Word Address (NWA)
						m_video_load_mar = true;
						m_video_byte_idx = false;
				} else if ((byte & 0xc1) == 0xc1) {
						// End of line (EOL)
						// Fill rest of buffer with spaces
						memset(&m_video_buff[ buff_idx ].chars[ char_idx ] , 0x20 , 80 - char_idx);
						memset(&m_video_buff[ buff_idx ].attrs[ char_idx ] , m_video_attr , 80 - char_idx);
						m_video_buff[ buff_idx ].full = true;
						break;
				} else {
						// Normal character
						m_video_buff[ buff_idx ].chars[ char_idx ] = byte;
						m_video_buff[ buff_idx ].attrs[ char_idx ] = m_video_attr;
						char_idx++;
						if (char_idx == 80) {
								m_video_buff[ buff_idx ].full = true;
								break;
						}
				}
		}
}

void hp9845b_state::video_render_buff(unsigned video_scanline , unsigned line_in_row, bool buff_idx)
{
		if (!m_video_buff[ buff_idx ].full) {
				m_video_blanked = true;
		}

				const pen_t *pen = m_palette->pens();

		if (m_video_blanked) {
						// Blank scanline
						for (unsigned i = 0; i < VIDEO_HBSTART; i++) {
								m_bitmap.pix32(video_scanline , i) = pen[ 0 ];
						}
		} else {
				bool cursor_line = line_in_row == 12;
				bool ul_line = line_in_row == 14;
								unsigned video_frame = (unsigned)m_screen->frame_number();
				bool cursor_blink = BIT(video_frame , 3);
				bool char_blink = BIT(video_frame , 4);

				for (unsigned i = 0; i < 80; i++) {
						uint8_t charcode = m_video_buff[ buff_idx ].chars[ i ];
						uint8_t attrs = m_video_buff[ buff_idx ].attrs[ i ];
						uint16_t chrgen_addr = ((uint16_t)(charcode ^ 0x7f) << 4) | line_in_row;
						uint16_t pixels;

						if ((ul_line && BIT(attrs , 3)) ||
							(cursor_line && cursor_blink && BIT(attrs , 0))) {
								pixels = ~0;
						} else if (char_blink && BIT(attrs , 2)) {
								pixels = 0;
						} else if (BIT(attrs , 4)) {
							pixels = (uint16_t)(m_optional_chargen[ chrgen_addr ] & 0x7f) << 1;
						} else {
							pixels = (uint16_t)(m_chargen[ chrgen_addr ] & 0x7f) << 1;
						}

						if (BIT(attrs , 1)) {
								pixels = ~pixels;
						}

						for (unsigned j = 0; j < 9; j++) {
								bool pixel = (pixels & (1U << j)) != 0;

								m_bitmap.pix32(video_scanline , i * 9 + j) = pen[ pixel ? 1 : 0 ];
						}
				}
		}
}

TIMER_DEVICE_CALLBACK_MEMBER(hp9845b_state::scanline_timer)
{
		unsigned video_scanline = param;

		if (m_graphic_sel) {
				if (video_scanline >= GVIDEO_VBEND && video_scanline < GVIDEO_VBSTART) {
						graphic_video_render(video_scanline);
				}
		} else if (video_scanline < VIDEO_ACTIVE_SCANLINES) {
				unsigned row = video_scanline / VIDEO_CHAR_HEIGHT;
				unsigned line_in_row = video_scanline - row * VIDEO_CHAR_HEIGHT;

				if (line_in_row == 0) {
						// Start of new row, swap buffers
						m_video_buff_idx = !m_video_buff_idx;
						video_fill_buff(!m_video_buff_idx);
				}

				video_render_buff(video_scanline , line_in_row , m_video_buff_idx);
		}
}

TIMER_DEVICE_CALLBACK_MEMBER(hp9845b_state::gv_timer)
{
		advance_gv_fsm(false , false);
}

void hp9845b_state::vblank_w(screen_device &screen, bool state)
{
				// VBlank signal is fed into HALT flag of PPU
				m_ppu->halt_w(state);

				if (state) {
								// Start of V blank
								set_video_mar(0);
								m_video_load_mar = true;
								m_video_first_mar = true;
								m_video_byte_idx = false;
								m_video_blanked = false;
								m_video_buff_idx = !m_video_buff_idx;
								video_fill_buff(!m_video_buff_idx);
				}
}

void hp9845b_state::set_graphic_mode(bool graphic)
{
		if (graphic != m_graphic_sel) {
				m_graphic_sel = graphic;
				logerror("GS=%d\n" , graphic);
				if (m_graphic_sel) {
						m_screen->configure(GVIDEO_HTOTAL , GVIDEO_VTOTAL , rectangle(GVIDEO_HBEND , GVIDEO_HBSTART - 1 , GVIDEO_VBEND , GVIDEO_VBSTART - 1) , HZ_TO_ATTOSECONDS(VIDEO_PIXEL_CLOCK) * GVIDEO_HTOTAL * GVIDEO_VTOTAL);
				} else {
						m_screen->configure(VIDEO_HTOTAL , VIDEO_VTOTAL , rectangle(0 , VIDEO_HBSTART - 1 , 0 , VIDEO_ACTIVE_SCANLINES - 1) , HZ_TO_ATTOSECONDS(VIDEO_PIXEL_CLOCK) * VIDEO_HTOTAL * VIDEO_VTOTAL);
				}
		}
}

READ16_MEMBER(hp9845b_state::graphic_r)
{
		uint16_t res = 0;

		switch (offset) {
		case 0:
				// R4: data register
				res = m_gv_data_r;
				advance_gv_fsm(true , false);
				break;

		case 1:
				// R5: status register
				if (m_gv_int_en) {
						BIT_SET(res, 7);
				}
				if (m_gv_dma_en) {
						BIT_SET(res, 6);
				}
				BIT_SET(res, 5);
				break;

		case 2:
				// R6: data register with DMA TC
				m_gv_dma_en = false;
				res = m_gv_data_r;
				advance_gv_fsm(true , false);
				break;

		case 3:
				// R7: not mapped
				break;
		}

		//logerror("rd gv R%u = %04x\n", 4 + offset , res);

		return res;
}

WRITE16_MEMBER(hp9845b_state::graphic_w)
{
		//logerror("wr gv R%u = %04x\n", 4 + offset , data);

		switch (offset) {
		case 0:
				// R4: data register
				m_gv_data_w = data;
				m_gv_cursor_w = data;
				advance_gv_fsm(true , false);
				break;

		case 1:
				// R5: command register
				m_gv_cmd = (uint8_t)(data & 0xf);
				if (BIT(data , 5)) {
						m_gv_fsm_state = GV_STAT_RESET;
				}
				m_gv_dma_en = BIT(data , 6) != 0;
				m_gv_int_en = BIT(data , 7) != 0;
				advance_gv_fsm(false , false);
				break;

		case 2:
				// R6: data register with DMA TC
				m_gv_dma_en = false;
				m_gv_data_w = data;
				m_gv_cursor_w = data;
				advance_gv_fsm(true , false);
				break;

		case 3:
				// R7: trigger
				advance_gv_fsm(false , true);
				break;
		}
}

attotime hp9845b_state::time_to_gv_mem_availability(void) const
{
		if (m_graphic_sel) {
				int hpos = m_screen->hpos();
				if (hpos < (34 - GVIDEO_HCNT_OFF) || hpos >= (628 - GVIDEO_HCNT_OFF)) {
						// Access to graphic memory available now
						return attotime::zero;
				} else {
						// Wait until start of hblank
						return m_screen->time_until_pos(m_screen->vpos() , 628);
				}
		} else {
				// TODO:
				return attotime::zero;
		}
}

void hp9845b_state::advance_gv_fsm(bool ds , bool trigger)
{
		bool get_out = false;

		attotime time_mem_av;

		do {
				bool act_trig = trigger || m_gv_dma_en || !BIT(m_gv_cmd , 2);

				switch (m_gv_fsm_state) {
				case GV_STAT_WAIT_DS_0:
						if ((m_gv_cmd & 0xc) == 0xc) {
								// Read command (11xx)
								m_gv_fsm_state = GV_STAT_WAIT_MEM_0;
						} else if (ds) {
								// Wait for data strobe (r/w on r4 or r6)
								m_gv_fsm_state = GV_STAT_WAIT_TRIG_0;
						} else {
								get_out = true;
						}
						break;

				case GV_STAT_WAIT_TRIG_0:
						// Wait for trigger
						if (act_trig) {
								if (BIT(m_gv_cmd , 3)) {
										// Not a cursor command
										// Load memory address
										m_gv_io_counter = ~m_gv_data_w & GVIDEO_ADDR_MASK;
										// Write commands (10xx)
										m_gv_fsm_state = GV_STAT_WAIT_DS_2;
								} else {
										// Cursor command (0xxx)
										if (BIT(m_gv_cmd , 2)) {
												// Write X cursor position (01xx)
												m_gv_cursor_x = (~m_gv_cursor_w >> 6) & 0x3ff;
												//logerror("gv x curs pos = %u\n" , m_gv_cursor_x);
										} else {
												// Write Y cursor position and type (00xx)
												m_gv_cursor_y = (~m_gv_cursor_w >> 6) & 0x1ff;
												m_gv_cursor_gc = BIT(m_gv_cmd , 1) == 0;
												m_gv_cursor_fs = BIT(m_gv_cmd , 0) != 0;
												//logerror("gv y curs pos = %u gc = %d fs = %d\n" , m_gv_cursor_y , m_gv_cursor_gc , m_gv_cursor_fs);
										}
										m_gv_fsm_state = GV_STAT_WAIT_DS_0;
								}
						} else {
								get_out = true;
						}
						break;

				case GV_STAT_WAIT_MEM_0:
						time_mem_av = time_to_gv_mem_availability();
						if (time_mem_av.is_zero()) {
								// Read a word from graphic memory
								m_gv_data_r = m_graphic_mem[ m_gv_io_counter ];
								//logerror("rd gv mem @%04x = %04x\n" , m_gv_io_counter , m_gv_data_r);
								m_gv_io_counter = (m_gv_io_counter + 1) & GVIDEO_ADDR_MASK;
								m_gv_fsm_state = GV_STAT_WAIT_DS_1;
						} else {
								m_gv_timer->adjust(time_mem_av);
								get_out = true;
						}
						break;

				case GV_STAT_WAIT_DS_1:
						if (ds) {
								m_gv_fsm_state = GV_STAT_WAIT_MEM_0;
						} else {
								get_out = true;
						}
						break;

				case GV_STAT_WAIT_DS_2:
						// Wait for data word to be written
						if (ds) {
								m_gv_fsm_state = GV_STAT_WAIT_TRIG_1;
						} else {
								get_out = true;
						}
						break;

				case GV_STAT_WAIT_TRIG_1:
						// Wait for trigger
						if (act_trig) {
								if (BIT(m_gv_cmd , 1)) {
										// Clear words (101x)
										m_gv_data_w = 0;
										m_gv_fsm_state = GV_STAT_WAIT_MEM_1;
								} else if (BIT(m_gv_cmd , 0)) {
										// Write a single pixel (1001)
										m_gv_fsm_state = GV_STAT_WAIT_MEM_2;
								} else {
										// Write words (1000)
										m_gv_fsm_state = GV_STAT_WAIT_MEM_1;
								}
						} else {
								get_out = true;
						}
						break;

				case GV_STAT_WAIT_MEM_1:
						time_mem_av = time_to_gv_mem_availability();
						if (time_mem_av.is_zero()) {
								// Write a full word to graphic memory
								//logerror("wr gv mem @%04x = %04x\n" , m_gv_io_counter , m_gv_data_w);
								m_graphic_mem[ m_gv_io_counter ] = m_gv_data_w;
								m_gv_io_counter = (m_gv_io_counter + 1) & GVIDEO_ADDR_MASK;
								m_gv_fsm_state = GV_STAT_WAIT_DS_2;
						} else {
								m_gv_timer->adjust(time_mem_av);
								get_out = true;
						}
						break;

				case GV_STAT_WAIT_MEM_2:
						time_mem_av = time_to_gv_mem_availability();
						if (time_mem_av.is_zero()) {
								// Write a single pixel to graphic memory
								//logerror("wr gv pixel @%04x:%x = %d\n" , m_gv_io_counter , m_gv_data_w & 0xf , BIT(m_gv_data_w , 15));
								uint16_t mask = 0x8000 >> (m_gv_data_w & 0xf);
								if (BIT(m_gv_data_w , 15)) {
										// Set pixel
										m_graphic_mem[ m_gv_io_counter ] |= mask;
								} else {
										// Clear pixel
										m_graphic_mem[ m_gv_io_counter ] &= ~mask;
								}
								// Not really needed
								m_gv_io_counter = (m_gv_io_counter + 1) & GVIDEO_ADDR_MASK;
								m_gv_fsm_state = GV_STAT_WAIT_DS_0;
						} else {
								m_gv_timer->adjust(time_mem_av);
								get_out = true;
						}
						break;

				default:
						logerror("Invalid state reached %d\n" , m_gv_fsm_state);
						m_gv_fsm_state = GV_STAT_RESET;
				}

				ds = false;
				trigger = false;
		} while (!get_out);

		update_graphic_bits();
}

void hp9845b_state::update_graphic_bits(void)
{
		bool gv_ready = m_gv_fsm_state == GV_STAT_WAIT_DS_0 ||
			m_gv_fsm_state == GV_STAT_WAIT_DS_1 ||
			m_gv_fsm_state == GV_STAT_WAIT_DS_2;

		flg_w(GVIDEO_PA , gv_ready);

		bool irq = m_gv_int_en && !m_gv_dma_en && gv_ready;

		irq_w(GVIDEO_PA , irq);

		bool dmar = gv_ready && m_gv_dma_en;

		m_ppu->dmar_w(dmar);
}

void hp9845b_state::graphic_video_render(unsigned video_scanline)
{
		const pen_t *pen = m_palette->pens();
		bool yc = (video_scanline + GVIDEO_VCNT_OFF) == (m_gv_cursor_y + 6);
		bool yw;
		bool blink;

		if (m_gv_cursor_fs) {
				yw = true;
				// Steady cursor
				blink = true;
		} else {
				yw = (video_scanline + GVIDEO_VCNT_OFF) >= (m_gv_cursor_y + 2) &&
						(video_scanline + GVIDEO_VCNT_OFF) <= (m_gv_cursor_y + 10);
				// Blinking cursor (frame freq. / 16)
				blink = BIT(m_screen->frame_number() , 3) != 0;
		}

		unsigned mem_idx = 36 * (video_scanline - GVIDEO_VBEND);
		for (unsigned i = 0; i < GVIDEO_HPIXELS; i += 16) {
				uint16_t word = m_graphic_mem[ mem_idx++ ];
				unsigned x = i;
				for (uint16_t mask = 0x8000; mask != 0; mask >>= 1) {
						unsigned cnt_h = x + GVIDEO_HBEND + GVIDEO_HCNT_OFF;
						bool xc = cnt_h == (m_gv_cursor_x + 6);
						bool xw = m_gv_cursor_fs || (cnt_h >= (m_gv_cursor_x + 2) && cnt_h <= (m_gv_cursor_x + 10));
						unsigned pixel;
						if (blink && ((xw && yc) || (yw && xc && m_gv_cursor_gc))) {
								// Cursor
								pixel = 2;
						} else {
								// Normal pixel
								pixel = (word & mask) != 0;
						}
						m_bitmap.pix32(video_scanline - GVIDEO_VBEND , x++) = pen[ pixel ];
				}
		}
}

IRQ_CALLBACK_MEMBER(hp9845b_state::irq_callback)
{
		if (irqline == HPHYBRID_IRL) {
			//logerror("irq ack L %02x\n" , m_irl_pending);
				return m_irl_pending;
		} else {
			//logerror("irq ack H %02x\n" , m_irh_pending);
				return m_irh_pending;
		}
}

void hp9845b_state::update_irq(void)
{
		m_ppu->set_input_line(HPHYBRID_IRL , m_irl_pending != 0);
		m_ppu->set_input_line(HPHYBRID_IRH , m_irh_pending != 0);
}

void hp9845b_state::irq_w(uint8_t sc , int state)
{
	unsigned bit_n = sc % 8;

	if (sc < 8) {
		if (state) {
			BIT_SET(m_irl_pending, bit_n);
		} else {
			BIT_CLR(m_irl_pending, bit_n);
		}
	} else {
		if (state) {
			BIT_SET(m_irh_pending, bit_n);
		} else {
			BIT_CLR(m_irh_pending, bit_n);
		}
	}
	update_irq();
}

void hp9845b_state::update_flg_sts(void)
{
	bool sts = BIT(m_sts_status , m_pa);
	bool flg = BIT(m_flg_status , m_pa);
	m_ppu->status_w(sts);
	m_ppu->flag_w(flg);
}

void hp9845b_state::sts_w(uint8_t sc , int state)
{
	if (state) {
		BIT_SET(m_sts_status, sc);
	} else {
		BIT_CLR(m_sts_status, sc);
	}
	if (sc == m_pa) {
		update_flg_sts();
	}
}

void hp9845b_state::flg_w(uint8_t sc , int state)
{
	if (state) {
		BIT_SET(m_flg_status, sc);
	} else {
		BIT_CLR(m_flg_status, sc);
	}
	if (sc == m_pa) {
		update_flg_sts();
	}
}

void hp9845b_state::install_readwrite_handler(uint8_t sc , read16_delegate rhandler, write16_delegate whandler)
{
	// Install r/w handlers to cover all I/O addresses of PPU belonging to "sc" select code
	m_ppu->space(AS_IO).install_readwrite_handler(sc * 4 , sc * 4 + 3 , rhandler , whandler);
}

TIMER_DEVICE_CALLBACK_MEMBER(hp9845b_state::kb_scan)
{
		ioport_value input[ 4 ];
		input[ 0 ] = m_io_key0->read();
		input[ 1 ] = m_io_key1->read();
		input[ 2 ] = m_io_key2->read();
		input[ 3 ] = m_io_key3->read();

		// Set status bits for "shift", "control", "auto start" & "print all" keys
		// ** Print all **
		// (R,C) = (0,1)
		// Bit 12 in kb status
		if (BIT(input[ 0 ] , 1)) {
				BIT_SET(m_kb_status , 12);
				BIT_CLR(input[ 0 ] , 1);
		} else {
				BIT_CLR(m_kb_status, 12);
		}
		// ** Auto start **
		// (R,C) = (1,1)
		// Bit 13 in kb status
		if (BIT(input[ 0 ] , 17)) {
				BIT_SET(m_kb_status , 13);
				BIT_CLR(input[ 0 ] , 17);
		} else {
				BIT_CLR(m_kb_status, 13);
		}
		// ** Control **
		// (R,C) = (4,15)
		// Bit 14 in kb status
		if (BIT(input[ 2 ] , 15)) {
				BIT_SET(m_kb_status , 14);
				BIT_CLR(input[ 2 ] , 15);
		} else {
				BIT_CLR(m_kb_status, 14);
		}
		// ** Shift **
		// (R,C) = (0,15)
		// Bit 15 in kb status
		if (BIT(input[ 0 ] , 15)) {
				BIT_SET(m_kb_status , 15);
				BIT_CLR(input[ 0 ] , 15);
		} else {
				BIT_CLR(m_kb_status, 15);
		}

		// TODO: handle repeat key
		// TODO: handle ctrl+stop

		for (unsigned i = 0; i < 128; i++) {
				ioport_value mask = BIT_MASK(i & 0x1f);
				unsigned idx = i >> 5;

				if ((input[ idx ] & ~m_kb_state[ idx ]) & mask) {
						// Key pressed, store scancode & generate IRL
						m_kb_scancode = i;
						irq_w(0 , 1);
						BIT_SET(m_kb_status, 0);

						// Special case: pressing stop key sets LPU "status" flag
						if (i == 0x47) {
								m_lpu->status_w(1);
						}
				}
		}

		memcpy(&m_kb_state[ 0 ] , &input[ 0 ] , sizeof(m_kb_state));
}

READ16_MEMBER(hp9845b_state::kb_scancode_r)
{
		return ~m_kb_scancode & 0x7f;
}

READ16_MEMBER(hp9845b_state::kb_status_r)
{
		return m_kb_status;
}

WRITE16_MEMBER(hp9845b_state::kb_irq_clear_w)
{
		irq_w(0 , 0);
		BIT_CLR(m_kb_status, 0);
		m_lpu->status_w(0);

		if (BIT(data , 15)) {
			// Start beeper
			m_beep_timer->adjust(attotime::from_ticks(64, KEY_SCAN_OSCILLATOR / 512));
			m_beeper->set_state(1);
		}
}

TIMER_DEVICE_CALLBACK_MEMBER(hp9845b_state::beeper_off)
{
	m_beeper->set_state(0);
}

WRITE8_MEMBER(hp9845b_state::pa_w)
{
	if (data != m_pa) {
		m_pa = data;
		update_flg_sts();
	}
}

WRITE_LINE_MEMBER(hp9845b_state::t15_irq_w)
{
	irq_w(T15_PA , state);
}

WRITE_LINE_MEMBER(hp9845b_state::t15_flg_w)
{
	flg_w(T15_PA , state);
}

WRITE_LINE_MEMBER(hp9845b_state::t15_sts_w)
{
	sts_w(T15_PA , state);
}

static MACHINE_CONFIG_START( hp9845a, hp9845_state )
	//MCFG_CPU_ADD("lpu", HP_5061_3010, XTAL_11_4MHz)
	//MCFG_CPU_ADD("ppu", HP_5061_3011, XTAL_11_4MHz)

	// video hardware
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_UPDATE_DRIVER(hp9845_state, screen_update)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
	MCFG_SCREEN_SIZE(560, 455)
	MCFG_SCREEN_VISIBLE_AREA(0, 560-1, 0, 455-1)

	MCFG_SOFTWARE_LIST_ADD("optrom_list", "hp9845a_rom")
MACHINE_CONFIG_END

static MACHINE_CONFIG_START( hp9835a, hp9845_state )
	//MCFG_CPU_ADD("lpu", HP_5061_3001, XTAL_11_4MHz)
	//MCFG_CPU_ADD("ppu", HP_5061_3001, XTAL_11_4MHz)

	// video hardware
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_UPDATE_DRIVER(hp9845_state, screen_update)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
	MCFG_SCREEN_SIZE(560, 455)
	MCFG_SCREEN_VISIBLE_AREA(0, 560-1, 0, 455-1)

	MCFG_SOFTWARE_LIST_ADD("optrom_list", "hp9835a_rom")
MACHINE_CONFIG_END

static ADDRESS_MAP_START(global_mem_map , AS_PROGRAM , 16 , hp9845b_state)
	ADDRESS_MAP_GLOBAL_MASK(0x3f7fff)
	ADDRESS_MAP_UNMAP_LOW
	AM_RANGE(0x000000 , 0x007fff) AM_RAM AM_SHARE("lpu_ram")
	AM_RANGE(0x014000 , 0x017fff) AM_RAM AM_SHARE("ppu_ram")
	AM_RANGE(0x020000 , 0x027fff) AM_RAM AM_SHARE("lpu_02_ram")
	AM_RANGE(0x030000 , 0x037fff) AM_ROM AM_REGION("lpu" , 0)
	AM_RANGE(0x040000 , 0x047fff) AM_RAM AM_SHARE("lpu_04_ram")
	AM_RANGE(0x050000 , 0x057fff) AM_ROM AM_REGION("ppu" , 0)
ADDRESS_MAP_END

static ADDRESS_MAP_START(ppu_io_map , AS_IO , 16 , hp9845b_state)
		ADDRESS_MAP_UNMAP_LOW
		// PA = 0, IC = 2
		// Keyboard scancode input
		AM_RANGE(HP_MAKE_IOADDR(0 , 2) , HP_MAKE_IOADDR(0 , 2)) AM_READ(kb_scancode_r)
		// PA = 0, IC = 3
		// Keyboard status input & keyboard interrupt clear
		AM_RANGE(HP_MAKE_IOADDR(0 , 3) , HP_MAKE_IOADDR(0 , 3)) AM_READWRITE(kb_status_r , kb_irq_clear_w)
		// PA = 13, IC = 0..3
		// Graphic video
		AM_RANGE(HP_MAKE_IOADDR(GVIDEO_PA , 0) , HP_MAKE_IOADDR(GVIDEO_PA , 3)) AM_READWRITE(graphic_r , graphic_w)
		// PA = 15, IC = 0..3
		// Right-hand side tape drive (T15)
		AM_RANGE(HP_MAKE_IOADDR(T15_PA , 0) , HP_MAKE_IOADDR(T15_PA , 3))        AM_DEVREADWRITE("t15" , hp_taco_device , reg_r , reg_w)
ADDRESS_MAP_END

static MACHINE_CONFIG_START( hp9845b, hp9845b_state )
	MCFG_CPU_ADD("lpu", HP_5061_3001, 5700000)
		MCFG_CPU_PROGRAM_MAP(global_mem_map)
		MCFG_HPHYBRID_SET_9845_BOOT(true)
	MCFG_CPU_ADD("ppu", HP_5061_3001, 5700000)
		MCFG_CPU_PROGRAM_MAP(global_mem_map)
	MCFG_CPU_IO_MAP(ppu_io_map)
		MCFG_HPHYBRID_SET_9845_BOOT(true)
	MCFG_CPU_IRQ_ACKNOWLEDGE_DRIVER(hp9845b_state , irq_callback)
		MCFG_HPHYBRID_PA_CHANGED(WRITE8(hp9845b_state , pa_w))

	// video hardware
	MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green())
	MCFG_SCREEN_UPDATE_DRIVER(hp9845b_state, screen_update)
		// These parameters are for alpha video
	MCFG_SCREEN_RAW_PARAMS(VIDEO_PIXEL_CLOCK , VIDEO_HTOTAL , 0 , VIDEO_HBSTART , VIDEO_VTOTAL , 0 , VIDEO_ACTIVE_SCANLINES)
		MCFG_SCREEN_VBLANK_DRIVER(hp9845b_state, vblank_w)
	MCFG_PALETTE_ADD_MONOCHROME_HIGHLIGHT("palette")

	MCFG_TIMER_DRIVER_ADD_SCANLINE("scantimer", hp9845b_state, scanline_timer, "screen", 0, 1)
		MCFG_TIMER_DRIVER_ADD("gv_timer", hp9845b_state, gv_timer)

	// Actual keyboard refresh rate should be KEY_SCAN_OSCILLATOR / 128 (2560 Hz)
	MCFG_TIMER_DRIVER_ADD_PERIODIC("kb_timer" , hp9845b_state , kb_scan , attotime::from_hz(100))

	// Beeper
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("beeper" , BEEP , KEY_SCAN_OSCILLATOR / 512)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS , "mono" , 1.00)

	MCFG_TIMER_DRIVER_ADD("beep_timer" , hp9845b_state , beeper_off);

		// Tape controller
		MCFG_DEVICE_ADD("t15" , HP_TACO , 4000000)
		MCFG_TACO_IRQ_HANDLER(WRITELINE(hp9845b_state , t15_irq_w))
		MCFG_TACO_FLG_HANDLER(WRITELINE(hp9845b_state , t15_flg_w))
		MCFG_TACO_STS_HANDLER(WRITELINE(hp9845b_state , t15_sts_w))

	// In real machine there were 8 slots for LPU ROMs and 8 slots for PPU ROMs in
	// right-hand side and left-hand side drawers, respectively.
	// Here we do away with the distinction between LPU & PPU ROMs: in the end they
	// are visible to both CPUs at the same addresses.
	MCFG_DEVICE_ADD("drawer1", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)
	MCFG_DEVICE_ADD("drawer2", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)
	MCFG_DEVICE_ADD("drawer3", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)
	MCFG_DEVICE_ADD("drawer4", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)
	MCFG_DEVICE_ADD("drawer5", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)
	MCFG_DEVICE_ADD("drawer6", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)
	MCFG_DEVICE_ADD("drawer7", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)
	MCFG_DEVICE_ADD("drawer8", HP_OPTROM_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(hp_optrom_slot_device, NULL, false)

	MCFG_SOFTWARE_LIST_ADD("optrom_list", "hp9845b_rom")

	MCFG_HP9845_IO_SLOT_ADD("slot0")
MACHINE_CONFIG_END

ROM_START( hp9845a )
	ROM_REGION( 0200000, "lpu", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "09845-65544-65547-03-system_lpu.bin", 0000000, 0200000, CRC(47beb87f) SHA1(456caefacafcf19435e1e7e68b1c1e4010841664) )

	ROM_REGION( 0200000, "ppu", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "09845-65540-65543-01-system_ppu.bin", 0000000, 0160000, CRC(bc0a34cc) SHA1(9ff215f4ba32ad85f144845d15f762a71e35588b) )
ROM_END

#define rom_hp9845s rom_hp9845a

ROM_START( hp9835a )
	ROM_REGION( 0200000, "lpu", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-2800-03_00-system-lpu.bin", 0000000, 020000, CRC(e0b0977a) SHA1(5afdc6c725abff70b674e46688d8ab38ccf8f3c1) )
	ROM_LOAD( "1818-2801-03_10-system-lpu.bin", 0020000, 020000, CRC(c51c1e3a) SHA1(798964fa2e7a1fc149ce4400b694630049293119) )
	ROM_LOAD( "1818-2802-03_20-system-lpu.bin", 0040000, 020000, CRC(bba70a7e) SHA1(2d488594493f8dfcd753e462414cc51c24596a2c) )
	ROM_LOAD( "1818-2803-03_30-system-lpu.bin", 0060000, 020000, CRC(65e9eba6) SHA1(a11f5d37e8ed14a428335c43e785d635b02d1129) )
	ROM_LOAD( "1818-2804-03_40-system-lpu.bin", 0100000, 020000, CRC(ef83b695) SHA1(8ca2914609ece2c9c59ebba6ece3fcbc8929aeaf) )
	ROM_LOAD( "1818-2805-03_50-system-lpu.bin", 0120000, 020000, CRC(401d539f) SHA1(00bda59f71632c4d4fc3268c04262bb81ef0eeba) )
	ROM_LOAD( "1818-2806-03_60-system-lpu.bin", 0140000, 020000, CRC(fe353db5) SHA1(0fb52d82d3743008cdebebb20c488e34ce2fca4b) )
	ROM_LOAD( "1818-2807-03_70-system-lpu.bin", 0160000, 020000, CRC(45a3cc5e) SHA1(35c9959331acf7c98ab6a880915b03e3e783a656) )

	ROM_REGION( 0200000, "ppu", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-2808-05_00-system-ppu.bin", 0000000, 020000, CRC(d0c96276) SHA1(cc578d586c4eda81469f29eb7cab7f667e0d5977) )
	ROM_LOAD( "1818-2809-05_30-system-ppu.bin", 0060000, 020000, CRC(ccdb7171) SHA1(1d24596bc1219983e7cb81f6987af094f2ca7d81) )
	ROM_LOAD( "1818-2810-05_40-system-ppu.bin", 0100000, 020000, CRC(97487d24) SHA1(823cd16671de8e6ff2c245060c99778acb6ff79c) )
	ROM_LOAD( "1818-2811-05_50-system-ppu.bin", 0120000, 020000, CRC(18aee6fd) SHA1(388d3b2a063ea2cfdfe9fb9f864fa5f08af817b0) )
	ROM_LOAD( "1818-2812-05_60-system-ppu.bin", 0140000, 020000, CRC(c0beeeae) SHA1(a5db36a7f7bad84c1013bd3ec4813c355f72427d) )
	ROM_LOAD( "1818-2813-05_70-system-ppu.bin", 0160000, 020000, CRC(75361bbf) SHA1(40f499c597da5c8c9a55a2a891976d946a54926b) )
ROM_END

#define rom_hp9835b rom_hp9835a

ROM_START( hp9845b )
	ROM_REGION(0x800 , "chargen" , 0)
	ROM_LOAD("chrgen.bin" , 0 , 0x800 , CRC(fe9e844f) SHA1(0c45ae00766ceba94a19bd5e154bd6d23e208cca))

	ROM_REGION(0x800 , "optional_chargen" , 0)
	ROM_LOAD("optional_chrgen.bin" , 0 , 0x800 , CRC(0ecfa63b) SHA1(c295e6393d1503d903c1d2ce576fa597df9746bf))

		ROM_REGION(0x10000, "lpu", ROMREGION_16BIT | ROMREGION_BE)
		ROM_LOAD("9845-LPU-Standard-Processor.bin", 0, 0x10000, CRC(dc266c1b) SHA1(1cf3267f13872fbbfc035b70f8b4ec6b5923f182))

		ROM_REGION(0x10000, "ppu", ROMREGION_16BIT | ROMREGION_BE)
		ROM_LOAD("9845-PPU-Standard-Graphics.bin", 0, 0x10000, CRC(f866510f) SHA1(3e22cd2072e3a5f3603a1eb8477b6b4a198d184d))

#if 0
	ROM_REGION( 0200000, "lpu", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-0823-0827-03_00-revb-system_lpu.bin", 0000000, 020000, CRC(7e49c781) SHA1(866c9ebd98d94bb6f99692e29d2d83f55b38c4b6) )
	ROM_LOAD( "1818-0823-0827-03_10-revb-system_lpu.bin", 0020000, 020000, CRC(2f819e3d) SHA1(250886378c3ce2253229997007c7bf0be80a8d1d) )
	ROM_LOAD( "1818-0824-0828-03_20-reva-system_lpu.bin", 0040000, 020000, CRC(834f7063) SHA1(5c390ed74671e4663cc80d899d07b69fd1fb4be6) )
	ROM_LOAD( "1818-0824-0828-03_20-revb-system_lpu.bin", 0040000, 020000, CRC(aa221deb) SHA1(7878643405ee45405dc5269c3b6dc9459f39437b) )
	ROM_LOAD( "1818-0824-0828-03_30-reva-system_lpu.bin", 0060000, 020000, CRC(0ebafdb2) SHA1(80733bfb7026d39a294841221d80ec40eafffe34) )
	ROM_LOAD( "1818-0824-0828-03_30-revb-system_lpu.bin", 0060000, 020000, CRC(0ebafdb2) SHA1(80733bfb7026d39a294841221d80ec40eafffe34) )
	ROM_LOAD( "1818-0825-0829-03_40-revb-system_lpu.bin", 0100000, 020000, CRC(beb09a57) SHA1(b832b995fa21c219673f0c7cf215dee70698f4f1) )
	ROM_LOAD( "1818-0825-0829-03_50-revb-system_lpu.bin", 0120000, 020000, CRC(bbb06222) SHA1(b0bfe1b48fac61eb955e27e0ddfbea020e09e0eb) )
	ROM_LOAD( "1818-0826-0830-03_60-revc-system_lpu.bin", 0140000, 020000, CRC(5c1c3abe) SHA1(fa9f99bf7c8a6df5c71e9fd8c807f0a2ff06640d) )
	ROM_LOAD( "1818-0826-0830-03_70-revc-system_lpu.bin", 0160000, 020000, CRC(0c61a266) SHA1(0cfbf482e7f8e99c87b97c77cf178682cd7af7d6) )

	ROM_REGION( 0200000, "lpu_fast", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-1506-1502-03_00-reva-system_fast_lpu.bin", 0000000, 020000, CRC(b77194d8) SHA1(6feec8605331783e6f5a2ab6d6cbd9285036e863) )
	ROM_LOAD( "1818-1506-1502-03_10-reva-system_fast_lpu.bin", 0020000, 020000, CRC(bc5557a5) SHA1(282237e561c3f2304cdeb45efa2432748581af45) )
	ROM_LOAD( "1818-1507-1503-03_20-reva-system_fast_lpu.bin", 0040000, 020000, CRC(2ebc71e2) SHA1(a2d39fb24d565465304833dfd0ff87dd5ef26fb3) )
	ROM_LOAD( "1818-1507-1503-03_30-reva-system_fast_lpu.bin", 0060000, 020000, CRC(82e56bc4) SHA1(36201f343382e533c248ddd123507a2e195cca39) )
	ROM_LOAD( "1818-1508-1504-03_40-reva-system_fast_lpu.bin", 0100000, 020000, CRC(70b0fcb0) SHA1(3f7ce60cad0ffec8344f33d584869492c7f73026) )
	ROM_LOAD( "1818-1508-1504-03_50-reva-system_fast_lpu.bin", 0120000, 020000, CRC(935fab96) SHA1(ecb1da2a0bd46e8c0da2875a1af8cf71d8f4bb56) )
	ROM_LOAD( "1818-1509-1505-03_60-reva-system_fast_lpu.bin", 0140000, 020000, CRC(f4119af7) SHA1(72a3e8b8d7d306e55f8adf0e23225bb81bc2b4ba) )
	ROM_LOAD( "1818-1509-1505-03_70-reva-system_fast_lpu.bin", 0160000, 020000, CRC(22fb0864) SHA1(4e1dce32e84ba216dbbd4116f3b22ca7f254f529) )

	ROM_REGION( 0200000, "ppu", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-0833-0837-05_40-revc-system_ppu.bin", 0100000, 020000, CRC(d790795c) SHA1(7ba1e245a98379a34833a780898a784049e33b86) )
	ROM_LOAD( "1818-0833-0837-05_40-revd-system_ppu.bin", 0100000, 020000, CRC(49897e40) SHA1(780a9973ff26d40f470e2004fccceb1019f8ba7f) )
	ROM_LOAD( "1818-0833-0837-05_50-revc-system_ppu.bin", 0120000, 020000, CRC(ef8acde4) SHA1(e68648543aac2b841b08d7758949ba1339a83701) )
	ROM_LOAD( "1818-0833-0837-05_50-revd-system_ppu.bin", 0120000, 020000, CRC(54f61d07) SHA1(f807fb8a59cd9cd221f63907e6a86948a0bf7c1d) )
	ROM_LOAD( "1818-0834-0838-05_60-revc-system_ppu.bin", 0140000, 020000, CRC(20f2100a) SHA1(9304f0b069de9233d697588328f9657dbeabc254) )
	ROM_LOAD( "1818-0834-0838-05_60-revd-system_ppu.bin", 0140000, 020000, CRC(454af601) SHA1(54b56e67e855fd2d699a0dbef0b4d2e8c150c39b) )
	ROM_LOAD( "1818-0834-0838-05_70-revc-system_ppu.bin", 0160000, 020000, CRC(43f62491) SHA1(a9489b37b3fa8768ca6e503f346bd023833ae3ac) )
	ROM_LOAD( "1818-0834-0838-05_70-revd-system_ppu.bin", 0160000, 020000, CRC(43f62491) SHA1(a9489b37b3fa8768ca6e503f346bd023833ae3ac) )
	ROM_LOAD( "1818-1899-1898-05_60-reva-system_ppu.bin", 0140000, 020000, CRC(454af601) SHA1(54b56e67e855fd2d699a0dbef0b4d2e8c150c39b) )
	ROM_LOAD( "1818-1899-1898-05_70-reva-system_ppu.bin", 0160000, 020000, CRC(049604f2) SHA1(89bfd8e086bc9365f156966b0a62c3ac720fc627) )

	ROM_REGION( 0200000, "ppu_tops", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-0831-0835-05_00-reva-tops_ppu.bin", 0000000, 020000, CRC(7ddce706) SHA1(746e34d3de52a17372af9a9eb1ed4974a4eae656) )
	ROM_LOAD( "1818-0831-0835-05_10-reva-tops_ppu.bin", 0020000, 020000, CRC(d7fc3d47) SHA1(a3d723fe62f047cb0c17d405d07bb0b08d08e830) )
	ROM_LOAD( "1818-1209-1208-05_00-revb-tops_ppu.bin", 0000000, 020000, CRC(0dc90614) SHA1(94c07553a62b2c86414bc95314601f90eb4e4022) )
	ROM_LOAD( "1818-1209-1208-05_10-revb-tops_ppu.bin", 0020000, 020000, CRC(4e362657) SHA1(b09098c0acd56b11ec3b72ff3e8b5a1e14ef3ae8) )
	ROM_LOAD( "1818-1592-1591-05_00-revb-tops_ppu.bin", 0000000, 020000, CRC(8cfe29a8) SHA1(f1007b6b1d3f2b603653880c44cec48b23701263) )
	ROM_LOAD( "1818-1592-1591-05_10-revb-tops_ppu.bin", 0020000, 020000, CRC(95048264) SHA1(36cfddef9d1289fdaf69596e10d95f88a520feae) )

	ROM_REGION( 0200000, "ppu_kbd_us", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-0832-0836-05_20-revc-keyboard_us.bin", 0040000, 020000, CRC(3bf6268a) SHA1(65d7dfeaf34c74dbc86ebe5d3bb65c6bd10163cb) )
	ROM_LOAD( "1818-0832-0836-05_30-revc-keyboard_us.bin", 0060000, 020000, CRC(2dfc619c) SHA1(5c54ff502d1344907817210bfdfcab7f8d6b61bd) )

	ROM_REGION( 0200000, "ppu_kbd_de", ROMREGION_16BIT | ROMREGION_BE )
	ROM_LOAD( "1818-0841-0846-05_20-revc-keyboard_german.bin", 0040000, 020000, CRC(76667eca) SHA1(ac63e5d584d1f2da5668d8a9560f927f48e25e03) )
	ROM_LOAD( "1818-0841-0846-05_20-revd-keyboard_german.bin", 0060000, 020000, CRC(3bf6268a) SHA1(65d7dfeaf34c74dbc86ebe5d3bb65c6bd10163cb) )
	ROM_LOAD( "1818-0841-0846-05_30-revc-keyboard_german.bin", 0040000, 020000, CRC(2b83db22) SHA1(6eda714ce05d2d75f4c041e36b6b6df40697d94a) )
	ROM_LOAD( "1818-0841-0846-05_30-revd-keyboard_german.bin", 0060000, 020000, CRC(b4006959) SHA1(584a85f746a3b0c262fdf9e4be8e696c80cfd429) )
#endif
ROM_END

#define rom_hp9845t rom_hp9845b
#define rom_hp9845c rom_hp9845b

COMP( 1978, hp9845a,   0,       0,      hp9845a,       hp9845, driver_device, 0,      "Hewlett-Packard",  "9845A",  MACHINE_IS_SKELETON | MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
COMP( 1978, hp9845s,   hp9845a, 0,      hp9845a,       hp9845, driver_device, 0,      "Hewlett-Packard",  "9845S",  MACHINE_IS_SKELETON | MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
COMP( 1979, hp9835a,   0,       0,      hp9835a,       hp9845, driver_device, 0,      "Hewlett-Packard",  "9835A",  MACHINE_IS_SKELETON | MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
COMP( 1979, hp9835b,   hp9835a, 0,      hp9835a,       hp9845, driver_device, 0,      "Hewlett-Packard",  "9835B",  MACHINE_IS_SKELETON | MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
COMP( 1980, hp9845b,   0,       0,      hp9845b,       hp9845b,driver_device, 0,      "Hewlett-Packard",  "9845B",  0 )
COMP( 1980, hp9845t,   hp9845b, 0,      hp9845b,       hp9845b,driver_device, 0,      "Hewlett-Packard",  "9845T",  MACHINE_IS_SKELETON | MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
COMP( 1981, hp9845c,   hp9845b, 0,      hp9845b,       hp9845b,driver_device, 0,      "Hewlett-Packard",  "9845C",  MACHINE_IS_SKELETON | MACHINE_NOT_WORKING | MACHINE_NO_SOUND )