Spectravideo SVI318/328 Expansion Bus connector

#Computer#Misc motherboard connectors

50 pin MALE EDGE connector at the computer

PinNameDirDescription
1+5v-->Power, 300mA
2/CNTRL2<--Game adapter control signal
3+12v-->Power, 100mA
4-12v-->Power, 50mA
5/CNTRL1<--Game adapter control signal
6/WAIT<--Z80 WAIT
7/RST<--Z80 RST
8CPU CLK-->Buffered 3.58MHz system clock
9A15-->Buffered Address bus
10A14-->"
11A13-->"
12A12-->"
13A11-->"
14A10-->"
15A9-->"
16A8-->"
17A7-->"
18A6-->"
19A5-->"
20A4-->"
21A3-->"
22A2-->"
23A1-->"
24A0-->"
25/RFSH-->RAM expansion refresh
26/EXCSR<--Video-CPU write select
27/M1-->Z80 M1
28/EXCSW<--CPU-Video write select
29/WR-->Z80 WR
30/MREQ-->Z80 MREQ
31/IORQ-->Z80 IORQ
32/RD-->Z80 RD
33D0I/OBuffered Data Bus
34D1I/O"
35D2I/O"
36D3I/O"
37D4I/O"
38D5I/O"
39D6I/O"
40D7I/O"
41CSOUND<--Audio input signal
42/INT<--Z80 INT
43/RAMDIS<--Disable user RAM
44/ROMDIS<--Disable basic ROM
45/BK32-->Enable bank 32 Memory (8000-ffff)
46/BK31-->Enable bank 31 Memory (0000-7FFF)
47/BK22-->Enable bank 22 Memory (8000-FFFF)
48/BK21-->Enable bank 21 Memory (0000-7FFF)
49GND-System Ground
50GND-System Ground

SmartMedia pinout

Sun Attachment Unit Interface (AUI) connector