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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