Connector - Spectravideo SVI318/328 Expansion Bus

50 PIN MALE EDGE the computer.

Pin	Name	Direction	Description
1	+5v	Output	Power, 300mA
2	/CNTRL2	Input	Game adapter control signal
3	+12v	Output	Power, 100mA
4	-12v	Output	Power, 50mA
5	/CNTRL1	Input	Game adapter control signal
6	/WAIT	Input	Z80 WAIT
7	/RST	Input	Z80 RST
8	CPU CLK	Output	Buffered 3.58MHz system clock
9	A15	Output	Buffered Address bus
10	A14	Output	"
11	A13	Output	"
12	A12	Output	"
13	A11	Output	"
14	A10	Output	"
15	A9	Output	"
16	A8	Output	"
17	A7	Output	"
18	A6	Output	"
19	A5	Output	"
20	A4	Output	"
21	A3	Output	"
22	A2	Output	"
23	A1	Output	"
24	A0	Output	"
25	/RFSH	Output	RAM expansion refresh
26	/EXCSR	Input	Video-CPU write select
27	/M1	Output	Z80 M1
28	/EXCSW	Input	CPU-Video write select
29	/WR	Output	Z80 WR
30	/MREQ	Output	Z80 MREQ
31	/IORQ	Output	Z80 IORQ
32	/RD	Output	Z80 RD
33	D0	Input/Output	Buffered Data Bus
34	D1	Input/Output	"
35	D2	Input/Output	"
36	D3	Input/Output	"
37	D4	Input/Output	"
38	D5	Input/Output	"
39	D6	Input/Output	"
40	D7	Input/Output	"
41	CSOUND	Input	Audio input signal
42	/INT	Input	Z80 INT
43	/RAMDIS	Input	Disable user RAM
44	/ROMDIS	Input	Disable basic ROM
45	/BK32	Output	Enable bank 32 Memory (8000-ffff)
46	/BK31	Output	Enable bank 31 Memory (0000-7FFF)
47	/BK22	Output	Enable bank 22 Memory (8000-FFFF)
48	/BK21	Output	Enable bank 21 Memory (0000-7FFF)
49	GND	---	System Ground
50	GND	---	System Ground

Source: HW-Book 2001-06-08
Last modified: 2007-06-27 16:22:56.0
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