CPS1 board interconnects

channelmaniac · May 13, 2008

OK,

I've pinned out one of the connectors far enough to use in troubleshooting audio.

Enjoy!

RJ

Code:

CN1 (Sound)

A1 - VCC
B1 - GND
A2 - VCC
B2 - GND
A3 - VCC
B3 - GND
A4 - EPROM 9 CE*
B4 - A16		-------
A5 - A15		   ^
B5 - A14		   |
A6 - A13		   |
B6 - A12
A7 - A11
B7 - A10
A8 - A9
B8 - A8
A9 - A7
B9 - A6
A10 - A5		Z80 to EPROM 9
B10 - A4
A11 - A3
B11 - A2
A12 - A1
B12 - A0
A13 - D7
B13 - D6
A14 - D5
B14 - D4
A15 - D3		   |
B15 - D2		   |
A16 - D1		   |
B16 - D0		-------
A17 - EPROM 18 CE*	Pin 35 (OKI M6295)
B17 - EPROM 19 CE*	8E pin 6 (74LS04)
A18 - A16	Pin 34	-------
B18 - A15	Pin 33	   ^
A19 - A14	Pin 32	   |
B19 - A13	Pin 31	   |
A20 - A12	Pin 30
B20 - A11	Pin 29
A21 - A10	Pin 28
B21 - A9	Pin 27
A22 - A8	Pin 26
B22 - A7	Pin 25
A23 - A6	Pin 24
B23 - A5	Pin 23
A24 - A4	Pin 22	OKI M6295 to EPROM 18/19
B24 - A3	Pin 21
A25 - A2	Pin 20
B25 - A1	Pin 19
A26 - A0	Pin 18
B26 - D7	Pin 16
A27 - D6	Pin 15
B27 - D5	Pin 14
A28 - D4	Pin 13
B28 - D3	Pin 12	   |
A29 - D2	Pin 11	   |
B29 - D1	Pin 10     |
A30 - D0	Pin 9	-------
B30 - NC
A31 - NC
B31 - NC
A32 - NC
B32 - NC

channelmaniac · May 14, 2008

Here's another connector. It looks like it's mainly the graphics ROM connections. Some data lines are connected directly through the 74LS245 ICs while others are going through the C board.

Code:

CN4 (Char ROM Data/Select?)

G1 - GND
H1 - GND
G2 - GND
H2 - GND
G3 - GND
H3 - 1A PIN 2		-------		PIN 98	-------
G4 - 1A PIN 3		   ^		PIN 97	   ^
H4 - 1A PIN 4		   |		PIN 96	   |
G5 - 1A PIN 5		   |		PIN 95	   |
H5 - 1A PIN 6		PAL16L8		PIN 94
G6 - 1A PIN 7		IC 1A		PIN 93
H6 - 1A PIN 8		B Board		PIN 92
G7 - 1A PIN 9		   |		PIN 91
H7 - 1A PIN 11		   |		PIN 90
G8 - 1A PIN 13		   |		PIN 89
H8 - 1A PIN 15		-------		PIN 88
G9 - 1B PIN 5		-------		PIN 87
H9 - 1B PIN 4		74LS245		PIN 86	CPS-A-01
G10 - 1B PIN 3		B Board		PIN 85	DL-0311-1001
H10 - 1B PIN 2		-------		PIN 84	IC 2H
G11 - 1C PIN 2		-------		PIN 83	A Board
H11 - 1C PIN 3		   ^		PIN 82
G12 - 1C PIN 4		   |		PIN 80
H12 - 1C PIN 5		74LS245		PIN 79
G13 - 1C PIN 6		B Board		PIN 78
H13 - 1C PIN 7		   |		PIN 77
G14 - 1C PIN 8		   |		PIN 76
H14 - 1C PIN 9		-------		PIN 75
G15 - NC				PIN 74	   |
H15 - NC				PIN 73	   |
G16 - NC				PIN 72	   |
H16 - NC				PIN 71	-------
G17 - PIN 119		C Board		PIN 5 IC 8F A Board
H17 - 8E PIN 8	 	74LS08		JAMMA PIN P (Video Sync)
G18 - GND
H18 - GND
G19 - GND
H19 - PIN 104		-------		PIN 11 IC 4C A Board
G20 - PIN 102		   ^		R/W*	-------
H20 - PIN 101		   |		OE*	   ^
G21 - PIN 100		   |		A11	   |
H21 - PIN 99				A10	   |
G22 - PIN 98		Custom		A9	MB81C78A
H22 - PIN 97		Capcom 		A8	IC 1C & 3C
G23 - PIN 96		IC		A7	A Board
H23 - PIN 95		C Board		A6	(Color SRAM?)
G24 - PIN 94				A5
H24 - PIN 93				A4
G25 - PIN 92		   |		A3	   |
H25 - PIN 91		   |		A2	   |
G26 - PIN 90		   |		A1	   |
H26 - PIN 89		-------		A0	-------
G27 - VCC
H27 - VCC
G28 - VCC
H28 - VCC
G29 - VCC
H29 - VCC
G30 - Pin 108		C Board		PIN 6 IC 1F A Board (Video Clk?)
H30 - VCC
G31 - VCC
H31 - VCC
G32 - VCC
H32 - VCC

CPS1 board interconnects

channelmaniac

Mr Neo Fix-it

channelmaniac

Mr Neo Fix-it