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
|
/***************************************************************************
ACT Apricot PC/Xi
license: MAME, GPL-2.0+
copyright-holders: Dirk Best
- Error 29 (timer failed)
- Dump of the keyboard MCU ROM needed (can be dumped using test mode)
***************************************************************************/
#include "bus/centronics/ctronics.h"
#include "bus/rs232/rs232.h"
#include "cpu/i86/i86.h"
#include "cpu/i8089/i8089.h"
#include "machine/ram.h"
#include "machine/pit8253.h"
#include "machine/i8255.h"
#include "machine/pic8259.h"
#include "machine/z80dart.h"
#include "machine/wd_fdc.h"
#include "video/mc6845.h"
#include "sound/sn76496.h"
#include "imagedev/flopdrv.h"
#include "formats/apridisk.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class apricot_state : public driver_device
{
public:
apricot_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_cpu(*this, "ic91"),
m_ram(*this, RAM_TAG),
m_iop(*this, "ic71"),
m_sn(*this, "ic7"),
m_crtc(*this, "ic30"),
m_ppi(*this, "ic17"),
m_pic(*this, "ic31"),
m_pit(*this, "ic16"),
m_sio(*this, "ic15"),
m_rs232(*this, "rs232"),
m_centronics(*this, "centronics"),
m_fdc(*this, "ic68"),
m_floppy0(*this, "ic68:0"),
m_floppy1(*this, "ic68:1"),
m_screen_buffer(*this, "screen_buffer"),
m_data_selector_dtr(1),
m_data_selector_rts(1),
m_video_mode(0),
m_display_on(1),
m_display_enabled(0)
{ }
required_device<cpu_device> m_cpu;
required_device<ram_device> m_ram;
required_device<i8089_device> m_iop;
required_device<sn76489_device> m_sn;
required_device<mc6845_device> m_crtc;
required_device<i8255_device> m_ppi;
required_device<pic8259_device> m_pic;
required_device<pit8253_device> m_pit;
required_device<z80sio0_device> m_sio;
required_device<rs232_port_device> m_rs232;
required_device<centronics_device> m_centronics;
required_device<wd2793_t> m_fdc;
required_device<floppy_connector> m_floppy0;
required_device<floppy_connector> m_floppy1;
required_shared_ptr<UINT16> m_screen_buffer;
DECLARE_WRITE8_MEMBER( i8089_ca1_w );
DECLARE_WRITE8_MEMBER( i8089_ca2_w );
DECLARE_WRITE8_MEMBER( i8255_portb_w );
DECLARE_READ8_MEMBER( i8255_portc_r );
DECLARE_WRITE8_MEMBER( i8255_portc_w );
DECLARE_WRITE_LINE_MEMBER( timer_out1 );
DECLARE_WRITE_LINE_MEMBER( timer_out2 );
void wd2793_intrq_w(bool state);
void wd2793_drq_w(bool state);
DECLARE_WRITE_LINE_MEMBER( write_centronics_fault );
DECLARE_WRITE_LINE_MEMBER( write_centronics_perror );
DECLARE_WRITE_LINE_MEMBER( apricot_mc6845_de ) { m_display_enabled = state; };
DECLARE_WRITE_LINE_MEMBER( data_selector_dtr_w ) { m_data_selector_dtr = state; };
DECLARE_WRITE_LINE_MEMBER( data_selector_rts_w ) { m_data_selector_rts = state; };
virtual void machine_start();
IRQ_CALLBACK_MEMBER( irq_callback ) { return m_pic->inta_r(); }
int m_data_selector_dtr;
int m_data_selector_rts;
bool m_video_mode;
bool m_display_on;
int m_display_enabled;
UINT32 screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
int m_centronics_fault;
int m_centronics_perror;
};
//**************************************************************************
// I/O
//**************************************************************************
WRITE8_MEMBER( apricot_state::i8089_ca1_w )
{
m_iop->sel_w(0);
m_iop->ca_w(1);
m_iop->ca_w(0);
}
WRITE8_MEMBER( apricot_state::i8089_ca2_w )
{
m_iop->sel_w(1);
m_iop->ca_w(1);
m_iop->ca_w(0);
}
WRITE_LINE_MEMBER( apricot_state::write_centronics_fault )
{
m_centronics_fault = state;
m_sio->syncb_w(state);
m_ppi->pc2_w(state);
}
WRITE_LINE_MEMBER( apricot_state::write_centronics_perror )
{
m_centronics_perror = state;
}
READ8_MEMBER( apricot_state::i8255_portc_r )
{
UINT8 data = 0;
data |= m_centronics_perror << 0;
// schematic page 294 says pc1 is centronics pin 34, which is n/c.
data |= m_centronics_fault << 2;
data |= m_display_enabled << 3;
return data;
}
WRITE8_MEMBER( apricot_state::i8255_portb_w )
{
m_display_on = BIT(data, 3);
m_video_mode = BIT(data, 4);
if (!BIT(data, 5))
m_fdc->set_floppy(BIT(data, 6) ? m_floppy1->get_device() : m_floppy0->get_device());
// switch video modes
m_crtc->set_clock( m_video_mode ? XTAL_15MHz / 10 : XTAL_15MHz / 16);
m_crtc->set_hpixels_per_column( m_video_mode ? 10 : 16);
// PB7 Centronics transceiver direction. 0 = output, 1 = input
}
WRITE8_MEMBER( apricot_state::i8255_portc_w )
{
// schematic page 294 says pc4 outputs to centronics pin 13, which is the "select" output from the printer.
m_centronics->write_strobe(BIT(data, 5));
// schematic page 294 says pc6 outputs to centronics pin 15, which is unused
}
static const i8255_interface apricot_i8255a_intf =
{
DEVCB_DEVICE_MEMBER("cent_data_in", input_buffer_device, read),
DEVCB_DEVICE_MEMBER("cent_data_out", output_latch_device, write),
DEVCB_NULL,
DEVCB_DRIVER_MEMBER(apricot_state, i8255_portb_w),
DEVCB_DRIVER_MEMBER(apricot_state, i8255_portc_r),
DEVCB_DRIVER_MEMBER(apricot_state, i8255_portc_w)
};
WRITE_LINE_MEMBER( apricot_state::timer_out1 )
{
// receive clock via timer 1
if (m_data_selector_rts == 0 && m_data_selector_dtr == 0)
m_sio->rxca_w(state);
}
WRITE_LINE_MEMBER( apricot_state::timer_out2 )
{
// transmit clock via timer 2
if (m_data_selector_rts == 0 && m_data_selector_dtr == 0)
m_sio->txca_w(state);
// transmit and receive clock via timer 2
if (m_data_selector_rts == 1 && m_data_selector_dtr == 0)
{
m_sio->txca_w(state);
m_sio->rxca_w(state);
}
}
static const struct pit8253_interface apricot_pit8253_intf =
{
{
{ XTAL_4MHz / 16, DEVCB_LINE_VCC, DEVCB_DEVICE_LINE_MEMBER("ic31", pic8259_device, ir6_w) },
{ XTAL_4MHz / 2, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, timer_out1) },
{ XTAL_4MHz / 2, DEVCB_LINE_VCC, DEVCB_DRIVER_LINE_MEMBER(apricot_state, timer_out2) }
}
};
static Z80SIO_INTERFACE( apricot_z80sio_intf )
{
0, 0,
XTAL_4MHz / 16, XTAL_4MHz / 16,
// channel a
DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, write_txd),
DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, write_dtr),
DEVCB_DEVICE_LINE_MEMBER("rs232", rs232_port_device, write_rts),
DEVCB_DEVICE_LINE_MEMBER("ic71", i8089_device, drq2_w),
DEVCB_NULL,
// channel b
DEVCB_NULL,
DEVCB_DRIVER_LINE_MEMBER(apricot_state, data_selector_dtr_w),
DEVCB_DRIVER_LINE_MEMBER(apricot_state, data_selector_rts_w),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("ic31", pic8259_device, ir5_w),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL
};
//**************************************************************************
// FLOPPY
//**************************************************************************
void apricot_state::wd2793_intrq_w(bool state)
{
m_pic->ir4_w(state);
m_iop->ext1_w(state);
}
void apricot_state::wd2793_drq_w(bool state)
{
m_iop->drq1_w(state);
}
static SLOT_INTERFACE_START( apricot_floppies )
SLOT_INTERFACE( "d31v", SONY_OA_D31V )
SLOT_INTERFACE( "d32w", SONY_OA_D32W )
SLOT_INTERFACE_END
//**************************************************************************
// VIDEO EMULATION
//**************************************************************************
UINT32 apricot_state::screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
if (!m_display_on)
m_crtc->screen_update(screen, bitmap, cliprect);
else
bitmap.fill(RGB_BLACK, cliprect);
return 0;
}
static MC6845_UPDATE_ROW( apricot_update_row )
{
apricot_state *state = device->machine().driver_data<apricot_state>();
UINT8 *ram = state->m_ram->pointer();
int i, x;
if (state->m_video_mode)
{
// text mode
for (i = 0; i < x_count; i++)
{
UINT16 code = state->m_screen_buffer[(ma + i) & 0x7ff];
UINT16 offset = ((code & 0x7ff) << 5) | (ra << 1);
UINT16 data = ram[offset + 1] << 8 | ram[offset];
int fill = 0;
if (BIT(code, 12) && BIT(data, 14)) fill = 1; // strike-through?
if (BIT(code, 13) && BIT(data, 15)) fill = 1; // underline?
// draw 10 pixels of the character
for (x = 0; x <= 10; x++)
{
int color = fill ? 1 : BIT(data, x);
if (BIT(code, 15)) color = !color; // reverse?
bitmap.pix32(y, x + i*10) = RGB_MONOCHROME_GREEN_HIGHLIGHT[color ? 1 + BIT(code, 14) : 0];
}
}
}
else
{
// graphics mode
fatalerror("Graphics mode not implemented!\n");
}
}
static MC6845_INTERFACE( apricot_mc6845_intf )
{
false,
0,0,0,0,
10,
NULL,
apricot_update_row,
NULL,
DEVCB_DRIVER_LINE_MEMBER(apricot_state, apricot_mc6845_de),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
NULL
};
//**************************************************************************
// MACHINE EMULATION
//**************************************************************************
void apricot_state::machine_start()
{
// install shared memory to the main cpu and the iop
m_cpu->space(AS_PROGRAM).install_ram(0x00000, m_ram->size() - 1, m_ram->pointer());
m_iop->space(AS_PROGRAM).install_ram(0x00000, m_ram->size() - 1, m_ram->pointer());
// setup interrupt acknowledge callback for the main cpu
m_cpu->set_irq_acknowledge_callback(device_irq_acknowledge_delegate(FUNC(apricot_state::irq_callback), this));
// setup floppy disk controller callbacks
m_fdc->setup_intrq_cb(wd2793_t::line_cb(FUNC(apricot_state::wd2793_intrq_w), this));
m_fdc->setup_drq_cb(wd2793_t::line_cb(FUNC(apricot_state::wd2793_drq_w), this));
// motor on is connected to gnd
m_floppy0->get_device()->mon_w(0);
m_floppy1->get_device()->mon_w(0);
}
//**************************************************************************
// ADDRESS MAPS
//**************************************************************************
static ADDRESS_MAP_START( apricot_mem, AS_PROGRAM, 16, apricot_state )
// AM_RANGE(0x00000, 0x3ffff) AM_RAMBANK("standard_ram")
// AM_RANGE(0x40000, 0xeffff) AM_RAMBANK("expansion_ram")
AM_RANGE(0xf0000, 0xf0fff) AM_MIRROR(0x7000) AM_RAM AM_SHARE("screen_buffer")
AM_RANGE(0xfc000, 0xfffff) AM_MIRROR(0x4000) AM_ROM AM_REGION("bootstrap", 0)
ADDRESS_MAP_END
static ADDRESS_MAP_START( apricot_io, AS_IO, 16, apricot_state )
AM_RANGE(0x00, 0x03) AM_DEVREADWRITE8("ic31", pic8259_device, read, write, 0x00ff)
AM_RANGE(0x40, 0x47) AM_DEVREADWRITE8("ic68", wd2793_t, read, write, 0x00ff)
AM_RANGE(0x48, 0x4f) AM_DEVREADWRITE8("ic17", i8255_device, read, write, 0x00ff)
AM_RANGE(0x50, 0x51) AM_MIRROR(0x06) AM_DEVWRITE8("ic7", sn76489_device, write, 0x00ff)
AM_RANGE(0x58, 0x5f) AM_DEVREADWRITE8("ic16", pit8253_device, read, write, 0x00ff)
AM_RANGE(0x60, 0x67) AM_DEVREADWRITE8("ic15", z80sio0_device, ba_cd_r, ba_cd_w, 0x00ff)
AM_RANGE(0x68, 0x69) AM_MIRROR(0x04) AM_DEVWRITE8("ic30", mc6845_device, address_w, 0x00ff)
AM_RANGE(0x6a, 0x6b) AM_MIRROR(0x04) AM_DEVREADWRITE8("ic30", mc6845_device, register_r, register_w, 0x00ff)
AM_RANGE(0x70, 0x71) AM_MIRROR(0x04) AM_WRITE8(i8089_ca1_w, 0x00ff)
AM_RANGE(0x72, 0x73) AM_MIRROR(0x04) AM_WRITE8(i8089_ca2_w, 0x00ff)
AM_RANGE(0x78, 0x7f) AM_NOP // unavailable
ADDRESS_MAP_END
//**************************************************************************
// MACHINE DRIVERS
//**************************************************************************
static MACHINE_CONFIG_START( apricot, apricot_state )
// main cpu
MCFG_CPU_ADD("ic91", I8086, XTAL_15MHz / 3)
MCFG_CPU_PROGRAM_MAP(apricot_mem)
MCFG_CPU_IO_MAP(apricot_io)
// i/o cpu
MCFG_CPU_ADD("ic71", I8089, XTAL_15MHz / 3)
MCFG_CPU_PROGRAM_MAP(apricot_mem)
MCFG_CPU_IO_MAP(apricot_io)
MCFG_I8089_DATABUS_WIDTH(16)
MCFG_I8089_SINTR1(DEVWRITELINE("ic31", pic8259_device, ir0_w))
MCFG_I8089_SINTR2(DEVWRITELINE("ic31", pic8259_device, ir1_w))
// video hardware
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_SIZE(800, 400)
MCFG_SCREEN_VISIBLE_AREA(0, 800-1, 0, 400-1)
MCFG_SCREEN_REFRESH_RATE(72)
MCFG_SCREEN_UPDATE_DRIVER(apricot_state, screen_update_apricot)
MCFG_MC6845_ADD("ic30", MC6845, "screen", XTAL_15MHz / 10, apricot_mc6845_intf)
// sound hardware
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("ic7", SN76489, XTAL_4MHz / 2)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
// internal ram
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("256k")
MCFG_RAM_EXTRA_OPTIONS("384k,512k") // with 1 or 2 128k expansion boards
// devices
MCFG_I8255A_ADD("ic17", apricot_i8255a_intf)
MCFG_PIC8259_ADD("ic31", INPUTLINE("ic91", 0), VCC, NULL)
MCFG_PIT8253_ADD("ic16", apricot_pit8253_intf)
MCFG_Z80SIO0_ADD("ic15", XTAL_15MHz / 6, apricot_z80sio_intf)
// rs232 port
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, NULL)
// note: missing a receive clock callback to support external clock mode
// (m_data_selector_rts == 1 and m_data_selector_dtr == 0)
MCFG_RS232_RXD_HANDLER(DEVWRITELINE("ic15", z80dart_device, rxa_w))
MCFG_RS232_DCD_HANDLER(DEVWRITELINE("ic15", z80dart_device, dcda_w))
MCFG_RS232_DSR_HANDLER(DEVWRITELINE("ic15", z80dart_device, synca_w))
MCFG_RS232_CTS_HANDLER(DEVWRITELINE("ic15", z80dart_device, ctsa_w))
// centronics printer
MCFG_CENTRONICS_ADD("centronics", centronics_printers, "image")
MCFG_CENTRONICS_DATA_INPUT_BUFFER("cent_data_in")
MCFG_CENTRONICS_ACK_HANDLER(DEVWRITELINE("ic15", z80dart_device, ctsb_w))
MCFG_CENTRONICS_BUSY_HANDLER(DEVWRITELINE("ic15", z80dart_device, dcdb_w))
MCFG_CENTRONICS_FAULT_HANDLER(WRITELINE(apricot_state, write_centronics_fault))
MCFG_CENTRONICS_PERROR_HANDLER(WRITELINE(apricot_state, write_centronics_perror))
//MCFG_CENTRONICS_SELECT_HANDLER() // schematic page 294 says this is connected to pc4, but that is an output to the printer
MCFG_DEVICE_ADD("cent_data_in", INPUT_BUFFER, 0)
MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics")
// floppy
MCFG_WD2793x_ADD("ic68", XTAL_4MHz / 2)
MCFG_FLOPPY_DRIVE_ADD("ic68:0", apricot_floppies, "d32w", floppy_image_device::default_floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("ic68:1", apricot_floppies, "d32w", floppy_image_device::default_floppy_formats)
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( apricotxi, apricot )
MACHINE_CONFIG_END
//**************************************************************************
// ROM DEFINITIONS
//**************************************************************************
ROM_START( apricot )
ROM_REGION(0x4000, "bootstrap", 0)
ROM_LOAD16_BYTE("pc_bios_lo_001.bin", 0x0000, 0x2000, CRC(0c217cc2) SHA1(0d7a2b61e17966462b555115f962a175fadcf72a))
ROM_LOAD16_BYTE("pc_bios_hi_001.bin", 0x0001, 0x2000, CRC(7c27f36c) SHA1(c801bbf904815f76ec6463e948f57e0118a26292))
ROM_END
ROM_START( apricotxi )
ROM_REGION(0x4000, "bootstrap", 0)
ROM_LOAD16_BYTE("lo_ve007.u11", 0x0000, 0x2000, CRC(e74e14d1) SHA1(569133b0266ce3563b21ae36fa5727308797deee)) // LO Ve007 03.04.84
ROM_LOAD16_BYTE("hi_ve007.u9", 0x0001, 0x2000, CRC(b04fb83e) SHA1(cc2b2392f1b4c04bb6ec8ee26f8122242c02e572)) // HI Ve007 03.04.84
ROM_END
//**************************************************************************
// GAME DRIVERS
//**************************************************************************
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1983, apricot, 0, 0, apricot, 0, driver_device, 0, "ACT", "Apricot PC", GAME_NOT_WORKING )
COMP( 1984, apricotxi, apricot, 0, apricotxi, 0, driver_device, 0, "ACT", "Apricot Xi", GAME_NOT_WORKING )
|