Spectravideo SVI318/328 Expansion Bus

From HwB

Spectravideo SVI-605 (Super Expander) can be connected to this bus.

Pinout

Unknown.png

50 PIN MALE EDGE the computer.

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

Contributions

Sources

  • SVI 328 Mk II User Manual
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