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r30643 Sunday 25th May, 2014 at 02:08:38 UTC by R. Belmont
(MESS) New skeleton drivers: - Fanuc System P Model G (monochrome) [Guru, R. Belmont]

[src/mess/drivers]

fanucspmg.c

trunk/src/mess/drivers/fanucspmg.c

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2	2	// copyright-holders:R. Belmont
3	3	/***************************************************************************
4	4
5		Fanuc System P Model G
	5	Fanuc System P-Model G
6	6	Fanuc 1983
7	7
8	8	2014-03-22 Skeleton driver.
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12	12	Also known as Fanuc P-G System, this is a dedicated 8085+8086+8087-based computer
13	13	system running software for CNC Programming.
14	14	The system boots up from on-board EPROM and shows a big ASCII-art boot screen
15		FANUC SYSTEM P MODEL G and the ROM software version in the lower right corner.
	15	FANUC SYSTEM P and the ROM software version in the lower right corner.
16	16	To initiate booting from the floppy drive hold down the LOAD key for 3-5 seconds.
17	17	The system checks for a long LOAD key press so that it doesn't load software
18	18	if the LOAD key is accidentally pressed quickly while using the system, which would
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41	41	File (containing a 20MB HDD, two 8" floppy drives and two RS232 ports), Fanuc Cassette
42	42	Adapter, XY Plotter (A3 or A1), Fanuc Digitizing Tablet (A3 or A0) and Fanuc I/O Selector Box.
43	43
44		The P-G System has an internal 12" color monitor and dual 5 1/4" floppy drives.
45		A later model was released in 1986 called the Mark II using dual 3 1/2" floppy
46		drives. The previous version was SYSTEM P MODEL D. It had a 12" green monochrome
47		monitor and booted from, and stored to, a cassette tape or floppy disk.
	44	The P-G System has an internal 12" monitor and dual 5 1/4" floppy drives.
	45	The first model had a 12" monochrome green monitor. In 1985 a color version was released.
	46	In 1986 another model was released called the Mark II using dual 3 1/2" floppy drives.
48	47
49		The screen resolution is 512 x 384 pixels.
50		It can display 64 characters x 24 lines.
	48	The screen resolution is 512 x 384 pixels. It can display 64 characters x 24 lines.
51	49
52	50	The floppy format is custom. Floppies are double sided double density and
53	51	regular PC DSDD 360k floppies can be used after they are formatted using the
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57	55	The floppy drives are typical PC-type 5 1/4" 360k drives and were manufactured
58	56	by Y-E DATA, model YD-580.
59	57
60		The floppy disks can be backed-up and imaged using a DOS program called ImageDisk
	58	The 5 1/4" floppy disks can be backed-up and imaged using a DOS program called ImageDisk
61	59	which is available here.....
62	60	http://www.classiccmp.org/dunfield/img/index.htm
63	61	With a 5 1/4" HD floppy drive, in the GUI in settings change the number of
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68	66
69	67	The following is a complete list of software titles available.
70	68	The info is taken from a glossy sales brochure printed in July 1985.
71		Other versions did exist so this list is not final.
	69	Other versions probably exist so this list is not final.
72	70	* denotes it is dumped. All other titles are not dumped and are needed.
73	71
74	72	Language Input -
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90	88
91	89	Title                 Part Number
92	90	--------------------------------------
93		*Symbolic FAPT TURN    A08B-0033-J800#E +English
	91	*Symbolic FAPT TURN    A08B-0033-J800#E Edition B V02 L03 841116
94	92	Symbolic FAPT MILL    A08B-0033-J840#E
95	93	Symbolic FAPT DRILL   A08B-0033-J860#E
96	94	Symbolic FAPT CUT     A08B-0033-J820#E
97	95	FAPT DIGITIZER        A08B-0033-J510#E
98	96
99	97	+ Symbolic FAPT TURN was available in English, German, French, Dutch, Finnish,
100		and Swedish versions.
	98	and Swedish versions. Currently only the English version is archived.
101	99
102	100
103	101	Support System -
104	102
105	103	Title          Part Number
106	104	-------------------------------
107		*FAPT TRACER    A08B-0033-H620#E  Edition B 85/1/16
108		*FAPT TEACHER   A08B-0033-J610#E  Edition B 85/1/12
109		*FAPT DOCTOR    A08B-0033-J600#E  Edition B 84/12/21
	105	*FAPT TRACER    A08B-0033-H620#E  Edition B V02 L02 841108
	106	*FAPT TEACHER   A08B-0033-J610#E  Edition B L02 V01 841101
	107	*FAPT DOCTOR    A08B-0033-J600#E  Edition B V01 L03 841108
110	108
111	109
	110	The software listed above with (*) have been tested on both mono and color versions and works fine.
112	111	Note: To initiate booting from the floppy drive hold down the LOAD key for 3-5 seconds.
113	112
114		The software for the Fanuc System P Model G is extremely rare now and very
115		difficult to find. If you do have any of these wanted software titles or any manuals
116		listed below and want to help please contact me (Guru) via http://mamedev.org/contact.html
	113	The software for the Fanuc System P-Model G is extremely rare now and very difficult to find.
	114	If you do have any of these wanted software titles or any manuals listed below and want to help
	115	please contact me (Guru) via http://mamedev.org/contact.html
117	116
118	117	The following is a complete list of manuals available for the first edition of the
119		Fanuc System P Model G released in 1983. The info is taken from a glossy sales brochure
	118	Fanuc System P-Model G released in 1983. The info is taken from a glossy sales brochure
120	119	printed in July 1985. There were other manuals released later for the Mark II and
121	120	updated manuals (each with a different part number).
122	121	The manuals were available in Japanese and English. The part numbers listed here
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178	177
179	178
180	179	The unit has it's own dedicated keyboard with many special keys.
	180	The keyboard clips to the main box and is the top cover when the main box is transported.
181	181	The keyboard layout is shown below.
182	182
183	183	|------------------------------------------------------------------------------|
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257	257	Box Layout (top view)
258	258	----------
259	259
260		A08B-0033-B001
	260	A08B-0033-B001 (Color Version from 1985)
	261	A08B-0031-B001 (Mono Version from 1983)
	262	A08B-0031-B002 (Mono Version from 1984)
261	263	|--------------------------------------------|
262	264	| ------------MAIN PCB---------------------- |
263	265	|   -----------SUB-PCB-----------         |  |
264	266	|                                         |  |
265	267	| |-----------------------|               |  |
266	268	| |                       |               |  |
267		| |                       |               P  |
	269	| |   FANUC 12" COLOR     |               P  |
268	270	| |       CRT UNIT        |               O  |
269		| |                       |               W  |
	271	| |    A61L-0001-0078     |               W  |
270	272	| |                       |               E  |
271		| |      12" COLOR        |  |---------|  R  |
272		| |                       |  |FDD UNIT |  |  |
273		| |        SCREEN         |  |A87L-0001|  P  |
274		| |                       |  |-0026    |  C  |
275		| |                       |  |         |  B  |
276		| |                       |  |         |  |  |
277		| |                       |  |5 1/4"   |  |  |
278		| |                       |  |FLOPPY   |     |
	273	| |                       |  |---------|  R  |
	274	| |                       |  |FANUC    |  |  |
	275	| |          OR           |  |FDD UNIT |  P  |
	276	| |                       |  |A87l-0001|  C  |
	277	| |                       |  |-0026    |  B  |
	278	| |   FANUC 12" MONO      |  |         |  |  |
	279	| |       CRT UNIT        |  |5 1/4"   |  |  |
	280	| |   A61L-0001-0073      |  |FLOPPY   |     |
279	281	| |                       |  |DRIVES   |     |
280	282	| |                       |  |x2       |     |
281	283	| |-----------------------|  |---------|     |
282	284	|--------------------------------------------|
	285	Notes:
	286	The CRT tube in the color version is a Matsushita 320DHB22. Input voltage is 110V AC
	287	The CRT tube in the mono version is a Hitachi 310KEB31. Input voltage is 24V DC and B+ is 11.0V
	288	The mono version does not have a SUB PCB
	289	The power PCB is identical for both color and mono versions
283	290
284	291
285		Main PCB Layout
	292	Main PCB Layout (for color version)
286	293	---------------
287	294
288	295	A20B-1000-0710/03B
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301	308	|       CN7     CN6      CN5      CN4   CN3 |
302	309	|-------------------------------------------|
303	310	Notes:
304		D8086   - Intel 8086 CPU. Clock input 5.000MHz [15/3]
305		D8087   - Intel 8087 x87 Floating-Point Co-Processor. Clock input 5.000MHz [15/3]
	311	D8086   - Intel 8086-2 CPU. Clock input 5.000MHz [15/3]
	312	D8087   - Intel 8087-3 x87 Floating-Point Co-Processor. Clock input 5.000MHz [15/3]
306	313	XXXXXXX - Fujitsu MB8265-15 65536 x1-bit DRAM (72 chips total)
307	314	MB15541 - Fujitsu MB15541 Custom Chip
308	315	D765    - NEC D765 Single/Double Density Floppy-Disk Controller. Clock input 4.000MHz [16/4]
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312	319	D8259   - NEC D8259 Programmable Interrupt Controller
313	320	D8284   - Intel D8284 Clock Generator and Driver for 8086/8088 Processors
314	321	A40_00* - Fujitsu MBM2764 8k x8-bit EPROM
315		VR1/VR2 - Potentiometer
	322	VR1     - Potentiometer to adjust pulse width of floppy disk control unit
	323	VR2     - Potentiometer to adjust screen brightness
316	324	^       - 3 chips marked Y-E Data Fujitsu
317	325	MB4393
318	326	MB14324
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322	330	CNB     - 50-pin flat cable joining to Sub PCB
323	331	CNC     - 6-pin power cable joining to Sub PCB
324	332	CND     - 34-pin flat cable joining to FDD Unit
325		CNE     - Fanuc Honda MR-50 50-pin female connector for expansion (not used)
	333	CNE     - Fanuc Honda MR-50 50-pin female connector for factory testing (not used)
326	334	CNF     - Power input connector
327	335	CN1     - 25-pin Female D-type connector. (for RS232 external peripherals \  CNC Machine,
328	336	CN2     - 25-pin Female D-type connector. (for RS232 external peripherals  | PPR Unit, X-Y Plotter,
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330	338	CN4     - 25-pin Female D-type connector. (for RS232 external peripherals /  Cassette Adapter etc (connections in any order)
331	339	CN5     - Fanuc Honda MR-50 50-pin female connector (probably for external connection of the Fanuc Program File Unit)
332	340	CN6     - Fanuc Honda MR-20 20-pin female connector for the keyboard
333		CN7     - Fanuc Honda MR-20 20-pin male. Specification says 'not used' but this appears to be a
334		Facit 4070 Parallel Reader/Puncher connector
335		Pinout: (pin 1 is top left, location key is on the opposite side)
336		|---------------------------------------------------|
337		|                                                   |
338		| 1_PR   2_TE  3_ERR  4_TTY3  5_+6V  6_TTY2  7_TTY1 |
339		|                                                   |
340		|    8_SG   9_SD   10_0V  11_CH1  12_CH2  13_CH3    O
341		|                                                   |
342		| 14_CH4 15_CH5 16_CH6 17_CH7  18_CH8 19_CH9  20_PI |
343		|                                                   |
344		|---------------------------------------------------|
345		JUMPERS - 15 2-pin jumpers labelled S1 to S15. S2, S3 & S4 are not shorted. All others are shorted.
	341	CN7     - Fanuc Honda MR-20 20-pin male connector. Specification says 'not used'. Video signals are present on
	342	the connector so it is probably used for an external monitor
	343	JUMPERS - 15 2-pin jumpers labelled S1 to S15. S2, S3 & S4 are open and the others are shorted
346	344
347	345
348		Sub PCB Layout
	346	Sub PCB Layout (for color version)
349	347	--------------
350	348
351	349	A20B-1000-0720/02B
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364	362	|               6264 A41_020A.30B|
365	363	|--------------------------------|
366	364	Notes:
367		D8085   - NEC D8085A-2 CPU. Clock input 8.000MHz [16/2].
	365	D8085   - NEC D8085A-2 CPU. Clock input 8.000MHz [16/2]
368	366	Note 8085 has internal /2 divider so actual clock speed is 4.000MHz
369		HD6845S - Hitachi HD6845S / HD46505S CRT Controller. Clock input 2.000MHz [8/2]
	367	HD6845S - Hitachi HD6845S / HD46505S CRT Controller. Clock input 2.000MHz [16/8]
370	368	6264    - Hitachi HM6264P-15 8k x 8-bit SRAM
371	369	XXXXXXX - Fujitsu MB8265-15 65536 x1-bit DRAM (25 chips total)
372	370	MB15542 - Fujitsu MB15542 Custom Chip
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376	374	CNB     - 50-pin flat cable joining to Main PCB
377	375	CNC     - 6-pin power cable joining to Main PCB
378	376	CND     - 20-pin flat cable joining to CRT Unit (video output)
379		CNE     - Fanuc Honda MR-50 50-pin male connector for expansion (not used)
	377	CNE     - Fanuc Honda MR-50 50-pin male connector for factory testing (not used)
380	378	HSync   - 22.7273kHz
381	379	VSync   - 54.6330Hz
382	380
383	381
	382	Main PCB Layout (for mono version)
	383	---------------
	384
	385	A20B-1000-0140/09F
	386	|-------------------------------------------|
	387	| CN10          CN9  VR1   CN8              |
	388	|  6116         S3 ^                        |
	389	| A22_020B.5G             %  D765  XXXXXXXXX|
	390	|   16MHz   MB15542 MB15541  D8257 XXXXXXXXX|
	391	|             S4 15MHz D8284       XXXXXXXXX|
	392	| 8085-2    HD6845S  8087 D8259    XXXXXXXXX|
	393	| CN12  A21_010F.17D 8086 D8253 A25_001A.33E|
	394	|              CN11  S2    A25_002A.35E     |
	395	|                    S1 D8251 D8251   D39   |
	396	|                       D8251 D8251 S5 S6 S7|
	397	|    YYYYYYYYY       VR2   D8253  CN2   CN1 |
	398	|       CN7     CN6      CN5      CN4   CN3 |
	399	|-------------------------------------------|
	400	Notes:
	401	D8086   - Intel 8086-2 CPU. Clock input 5.000MHz [15/3]
	402	D8087   - Intel 8087-3 x87 Floating-Point Co-Processor. Clock input 5.000MHz [15/3]
	403	D8085   - NEC D8085A-2 CPU. Clock input 8.000MHz [16/2]
	404	Note 8085 has internal /2 divider so actual clock speed is 4.000MHz
	405	HD6845S - Hitachi HD6845S / HD46505S CRT Controller. Clock input 2.000MHz [16/8]
	406	XXXXXXX - Fujitsu MB8265-15 65536 x1-bit DRAM (36 chips total)
	407	YYYYYYY - Fujitsu MB8265-15 65536 x1-bit DRAM (9 chips total)
	408	6116    - Hitachi HM6116P-3 2k x 8-bit SRAM
	409	MB15541 - Fujitsu MB15541 Custom Chip
	410	MB15542 - Fujitsu MB15542 Custom Chip
	411	D765    - NEC D765 Single/Double Density Floppy-Disk Controller. Clock input 4.000MHz [16/4]
	412	D8251   - Intel D8251 Programmable Communications Interface (USART)
	413	D8253   - NEC D8253 Programmable Interval Timer. Clock input 1.25MHz [15/12]
	414	D8257   - NEC D8257 Programmable DMA Controller. Clock input 3.000MHz [15/5]
	415	D8259   - NEC D8259 Programmable Interrupt Controller
	416	D8284   - Intel D8284 Clock Generator and Driver for 8086/8088 Processors
	417	A2*     - Hitachi HN482764G 8k x8-bit EPROM
	418	VR1     - Potentiometer to adjust pulse width of floppy disk control unit
	419	VR2     - Potentiometer to adjust screen brightness
	420	^       - 3 chips marked Y-E Data Fujitsu
	421	MB4393
	422	MB14324
	423	MB14323
	424	%       - Unknown 20-pin Ceramic DIP chip with heat-sink
	425	CN1     - 25-pin Female D-type connector. (for RS232 external peripherals \  CNC Machine,
	426	CN2     - 25-pin Female D-type connector. (for RS232 external peripherals  | PPR Unit, X-Y Plotter,
	427	CN3     - 25-pin Female D-type connector. (for RS232 external peripherals  | Tablet,
	428	CN4     - 25-pin Female D-type connector. (for RS232 external peripherals /  Cassette Adapter etc (connections in any order)
	429	CN5     - Fanuc Honda MR-50 50-pin female connector (probably for external connection of the Fanuc Program File Unit)
	430	CN6     - Fanuc Honda MR-20 20-pin female connector for the keyboard
	431	CN7     - Fanuc Honda MR-20 20-pin male. Specification says 'not used' and no signals are present on the connector
	432	CN8     - 20-pin flat cable joining to CRT Unit (video output)
	433	CN9     - 34-pin flat cable joining to FDD Unit
	434	CN10    - Power input connector
	435	CN11/12 - Fanuc Honda MR-50 50-pin female connector for factory testing (not used)
	436	Sx      - 7 2-pin jumpers (S1 to S7). S2, S3 & S4 are open and the others are shorted
	437	D39     - Bank of 8 2-pin jumpers vertically orientated. 2 and 7 are shorted and the others are open
	438
	439
384	440	Block Diagram
385	441	-------------
386		Below is the block diagram shown in the Maintenance Manual.
	442	Below is the block diagram shown in the System P-Model G Maintenance Manual, relating to the mono version.
387	443	The arrows denote direction of data flow.
388	444
389	445	|-------|                                             |--------|      |----------------|
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400	456	|      /-->| Graphic memory|------|                             |
401	457	|      |   |---------------|      |                             |     |----------------|
402	458	|      |                          |         |--------|          |<--->|RS232C interface|---CN2
403		|      |                            |         | BOOT   |<-------->|     |----------------|
	459	|       |                          |         | BOOT   |<-------->|     |----------------|
404	460	|      |                          |         | EPROM  |          |
405	461	|      |   |----------------|     |         |--------|          |     |----------------|
406	462	|<-----|-->|Character memory|--|  |                             |<--->|RS232C interface|---CN3
407	463	|      |-->|----------------|  |  |         |--------|          |     |----------------|
408	464	|      |                       |  |         |Main RAM|<-------->|
409	465	|      |                       |  |         |--------|          |     |----------------|
410		|      |                       |  |                             |<--->|RS232C interface|---CN4
	466	|      |                        |  |                             |<--->|RS232C interface|---CN4
411	467	|      |                       |  |                             |     |----------------|
412	468	|---------|   |      |                       \/ \/                            |
413	469	|Keyboard |   \/     \---|---------------------------|                        |     |-----------------|  CN9  |--------|
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422	478	|Keyboard|                       | Screen  |
423	479	|--------|                       |---------|
424	480
425
426	481	TODO:
427	482	- Is the VRAM hookup anything like correct?
428	483	- Hookup enough keyboard to get it to boot a floppy, the FAPT DOCTOR
429	484	program will be invaluable to answering many questions.
430	485	- Shared RAM is 8k, but there are 2 6264s on the sub board.  Is shared RAM
431	486	banked?
432		- I/O is at F00xx:
433		':maincpu' (FC15A): unmapped program memory write to F0012 = 00CE & 00FF
434		':maincpu' (FC15D): unmapped program memory write to F0016 = 00CE & 00FF
435		':maincpu' (FC160): unmapped program memory write to F001A = 00CE & 00FF
436		':maincpu' (FC163): unmapped program memory write to F001E = 00CE & 00FF
437		':maincpu' (FC16D): unmapped program memory write to F000E = 0034 & 00FF
438		':maincpu' (FC172): unmapped program memory write to F0008 = 00D4 & 00FF
439		':maincpu' (FC177): unmapped program memory write to F0008 = 0030 & 00FF
440		':maincpu' (FC17C): unmapped program memory write to F000E = 0056 & 00FF
441		':maincpu' (FC181): unmapped program memory write to F000A = 0010 & 00FF
442		':maincpu' (FC186): unmapped program memory write to F000E = 0096 & 00FF
443		':maincpu' (FC18B): unmapped program memory write to F000C = 0010 & 00FF
444		':maincpu' (FC190): unmapped program memory write to F004E = 0034 & 00FF
445		':maincpu' (FC195): unmapped program memory write to F0048 = 0020 & 00FF
446		':maincpu' (FC19A): unmapped program memory write to F0048 = 004E & 00FF
447		':maincpu' (FC19F): unmapped program memory write to F004E = 0056 & 00FF
448		':maincpu' (FC1A4): unmapped program memory write to F004A = 0010 & 00FF
449		':maincpu' (FC1A9): unmapped program memory write to F004E = 0096 & 00FF
450		':maincpu' (FC1AE): unmapped program memory write to F004C = 0010 & 00FF
451	487
452		To boot a floppy put "bp fc5fa,1,{ip=c682;g}" and "bp fc6d7,1,{ip=c755;g}"
453		into the debugger.
	488	To boot a floppy put "bp fc5fa,1,{ip=c682;g}" and "bp fc6d7,1,{ip=c755;g}"
	489	into the debugger.
454	490
	491	At NMI: f8008 must have bit 7 clear and bit 6 set (e008 on 8085)
	492	f8009 must not equal 0x01 (e009 on 8085)
	493
	494	8085 sets f8008 to keyboard row 0 AND 0xf3
	495	"     "  f8009 to keyboard row 1
	496
455	497	****************************************************************************/
456	498
457	499	#include "emu.h"
r30642	r30643
543	585	DECLARE_READ8_MEMBER(get_slave_ack);
544	586	DECLARE_WRITE8_MEMBER(dma_page_w);
545	587
	588	DECLARE_READ16_MEMBER(magic_r);
	589
546	590	DECLARE_WRITE_LINE_MEMBER(vsync_w);
547	591	DECLARE_WRITE_LINE_MEMBER(tc_w);
548	592	DECLARE_WRITE_LINE_MEMBER(hrq_w);
549	593
550	594	MC6845_UPDATE_ROW(crtc_update_row);
	595	MC6845_UPDATE_ROW(crtc_update_row_mono);
551	596
552	597	DECLARE_DRIVER_INIT(fanucspmg);
553	598
r30642	r30643
624	669	m_dma_page = (data >> 2) & 0xf;
625	670	}
626	671
	672	READ16_MEMBER(fanucspmg_state::magic_r)
	673	{
	674	return 0x0041;   // 31 = memory error
	675	}
	676
627	677	static ADDRESS_MAP_START(maincpu_mem, AS_PROGRAM, 16, fanucspmg_state)
628	678	AM_RANGE(0x00000, 0x7ffff) AM_RAM   // main RAM
629		AM_RANGE(0x80000, 0x81fff) AM_RAM
630	679
631		//   AM_RANGE(0x80000, 0x83fff) AM_READWRITE8(shared2_r, shared2_w, 0xffff) // Comms with HDD controller ?
632		//   AM_RANGE(0x88000, 0x88001) AM_READ(busy_r)
633		//   AM_RANGE(0x8c000, 0x8c001) AM_WRITE(signal_w)
	680	AM_RANGE(0x80000, 0x81fff) AM_RAM   // believed to be shared RAM with a CPU inside the Program File
	681	AM_RANGE(0x88000, 0x88001) AM_NOP   // Program File "ready" bit
634	682
635	683	AM_RANGE(0xf0000, 0xf0003) AM_DEVREADWRITE8(PIC0_TAG, pic8259_device, read, write, 0x00ff)
636	684	AM_RANGE(0xf0004, 0xf0007) AM_DEVICE8(FDC_TAG, upd765a_device, map, 0x00ff)
r30642	r30643
644	692	AM_RANGE(0xf001c, 0xf001d) AM_DEVREADWRITE8(USART3_TAG, i8251_device, data_r, data_w, 0x00ff)
645	693	AM_RANGE(0xf001e, 0xf001f) AM_DEVREADWRITE8(USART3_TAG, i8251_device, status_r, control_w, 0x00ff)
646	694	AM_RANGE(0xf0020, 0xf0029) AM_DEVREADWRITE8(DMAC_TAG, i8257_device, read, write, 0xffff)
	695	AM_RANGE(0xf0042, 0xf0043) AM_READ(magic_r)
647	696	AM_RANGE(0xf0046, 0xf0047) AM_WRITE8(dma_page_w, 0x00ff)
648	697	AM_RANGE(0xf0048, 0xf004f) AM_DEVREADWRITE8(PIT1_TAG, pit8253_device, read, write, 0x00ff)
649	698	AM_RANGE(0xf2000, 0xf2003) AM_DEVREADWRITE8(PIC1_TAG, pic8259_device, read, write, 0x00ff)
r30642	r30643
700	749	return 0xff;
701	750	}
702	751
703		// bit 1 seems to route to bit 7 of f0004 on the 8086 (signals the "LOAD" key pressed?)
	752	// bit 1 is unknown
704	753	// bit 3 appears to enable vblank IRQs
705	754	WRITE8_MEMBER(fanucspmg_state::vbl_ctrl_w)
706	755	{
707	756	m_vbl_ctrl = data;
708	757	}
709	758
	759	// row 2: raising a bit toggles the corresponding bit at 500a
	760	// row 3: raising a bit toggles the corresponding bit at 500b
710	761	WRITE8_MEMBER(fanucspmg_state::keyboard_row_w)
711	762	{
712	763	m_keyboard_row = data;
r30642	r30643
734	785	AM_RANGE(0x5001, 0x5001) AM_DEVREADWRITE(CRTC_TAG, mc6845_device, register_r, register_w)
735	786	AM_RANGE(0x5008, 0x5008) AM_WRITE(keyboard_row_w)
736	787	AM_RANGE(0x5009, 0x5009) AM_READ(keyboard_r)
737		AM_RANGE(0x500a, 0x500b) AM_WRITENOP    // probably keyboard related, not sure how though
	788	AM_RANGE(0x500a, 0x500b) AM_WRITENOP    // keyboard rows 2 and 3 control what's written here. dip switches?
738	789	AM_RANGE(0x500c, 0x500c) AM_WRITE(vbl_ctrl_w)
739	790	AM_RANGE(0x500d, 0x500d) AM_WRITE(vram_bank_w)
740	791	AM_RANGE(0x500e, 0x500e) AM_READ(vblank_ack_r)
r30642	r30643
815	866	}
816	867	}
817	868
	869	MC6845_UPDATE_ROW( fanucspmg_state::crtc_update_row_mono )
	870	{
	871	UINT32  *p = &bitmap.pix32(y);
	872	int i;
	873	UINT8 *chargen = m_chargen->base();
	874
	875	for ( i = 0; i < x_count; i++ )
	876	{
	877	UINT16 offset = ( ma + i );
	878
	879	if (m_video_ctrl & 0x02)
	880	{
	881	if (offset <= 0x5ff)
	882	{
	883	UINT8 chr = m_vram[offset + 0x600];
	884	UINT8 attr = m_vram[offset];
	885	UINT8 data = chargen[ chr + (ra * 256) ];
	886	UINT32 fg = 0xff00;
	887	UINT32 bg = 0;
	888
	889	*p++ = ( data & 0x01 ) ? fg : bg;
	890	*p++ = ( data & 0x02 ) ? fg : bg;
	891	*p++ = ( data & 0x04 ) ? fg : bg;
	892	*p++ = ( data & 0x08 ) ? fg : bg;
	893	*p++ = ( data & 0x10 ) ? fg : bg;
	894	*p++ = ( data & 0x20 ) ? fg : bg;
	895	*p++ = ( data & 0x40 ) ? fg : bg;
	896	*p++ = ( data & 0x80 ) ? fg : bg;
	897	}
	898	}
	899	else
	900	{
	901	*p++ = 0;
	902	*p++ = 0;
	903	*p++ = 0;
	904	*p++ = 0;
	905	*p++ = 0;
	906	*p++ = 0;
	907	*p++ = 0;
	908	*p++ = 0;
	909	}
	910	}
	911	}
	912
818	913	static SLOT_INTERFACE_START( fanuc_floppies )
819	914	SLOT_INTERFACE( "525dd", FLOPPY_525_DD )
820	915	SLOT_INTERFACE_END
r30642	r30643
875	970	MCFG_MC6845_OUT_VSYNC_CB(WRITELINE(fanucspmg_state, vsync_w))
876	971	MACHINE_CONFIG_END
877	972
	973	static MACHINE_CONFIG_DERIVED( fanucspmgm, fanucspmg )
	974	MCFG_DEVICE_REMOVE( CRTC_TAG )
	975
	976	MCFG_MC6845_ADD( CRTC_TAG, HD6845, SCREEN_TAG, XTAL_8MHz/2)
	977	MCFG_MC6845_SHOW_BORDER_AREA(false)
	978	MCFG_MC6845_CHAR_WIDTH(8)
	979	MCFG_MC6845_UPDATE_ROW_CB(fanucspmg_state, crtc_update_row_mono)
	980	MCFG_MC6845_OUT_VSYNC_CB(WRITELINE(fanucspmg_state, vsync_w))
	981	MACHINE_CONFIG_END
	982
878	983	/* ROM definition */
879	984	ROM_START( fanucspg )
880	985	ROM_REGION(0x4000, MAINCPU_TAG, 0)
r30642	r30643
888	993	ROM_LOAD( "a42_020a.30b", 0x000000, 0x008000, CRC(33eb5962) SHA1(1157a72089ff77e8db9a9a8fcd0f6c32a1374f56) )
889	994	ROM_END
890	995
	996	ROM_START( fanucspgm )
	997	ROM_REGION(0x4000, MAINCPU_TAG, 0)
	998	ROM_LOAD16_BYTE( "a25_001a.33e", 0x000000, 0x002000, CRC(81159267) SHA1(f5d53cc6e929f57e8c3747f80fc74d4b1643222d) )
	999	ROM_LOAD16_BYTE( "a25_002a.35e", 0x000001, 0x002000, CRC(4fb82c4d) SHA1(eb75e9a2d3c8e4ad56a74624ee8c52c785bd0da6) )
	1000
	1001	ROM_REGION(0x4000, SUBCPU_TAG, 0)
	1002	ROM_LOAD( "a21_010f.17d", 0x000000, 0x002000, CRC(ef192717) SHA1(7fb3f7ca290d2437ae5956700f88c801018ce1cc) )
	1003
	1004	ROM_REGION(0x8000, CHARGEN_TAG, 0)
	1005	ROM_LOAD( "a22_020b.5g",  0x000000, 0x002000, CRC(7b5f8e20) SHA1(9de607e541d8aad2d1ea56321270bb8466b16e3d) )
	1006	ROM_END
	1007
891	1008	/* Driver */
892		/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT      CLASS           INIT       COMPANY  FULLNAME            FLAGS */
893		COMP( 1983, fanucspg, 0,      0,    fanucspmg, fanucspmg, fanucspmg_state, fanucspmg, "Fanuc", "System P Model G", GAME_NOT_WORKING | GAME_NO_SOUND)
	1009	/*    YEAR  NAME       PARENT       COMPAT   MACHINE    INPUT      CLASS           INIT       COMPANY  FULLNAME            FLAGS */
	1010	COMP( 1983, fanucspg,  0,             0,    fanucspmg,  fanucspmg, fanucspmg_state, fanucspmg, "Fanuc", "System P Model G", GAME_NOT_WORKING | GAME_NO_SOUND)
	1011	COMP( 1983, fanucspgm, fanucspg,      0,    fanucspmgm, fanucspmg, fanucspmg_state, fanucspmg, "Fanuc", "System P Model G (monochrome)", GAME_NOT_WORKING | GAME_NO_SOUND)

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