Spectravideo SVI318/328 Expansion Bus

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50 PIN MALE EDGE the computer.

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

References

Category:Cartridges - Expansions Connectors

 

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