Распиновка, расположение выводов и внешний вид платы расширения:
Spectravideo SVI318/328 Expansion Bus
(at the computer)
50 PIN MALE EDGE the computer.
Pin
Name
Dir
Description
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
8
CPU CLK
Buffered 3.58MHz system clock
9
A15
Buffered Address bus
10
A14
"
11
A13
"
12
A12
"
13
A11
"
14
A10
"
15
A9
"
16
A8
"
17
A7
"
18
A6
"
19
A5
"
20
A4
"
21
A3
"
22
A2
"
23
A1
"
24
A0
"
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
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
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)
49
GND
—
System Ground
50
GND
—
System Ground
Contributor:
Rob Gill
Source:
SVI 328 Mk II User Manual
Copyright © The Hardware Book Team 1996-2004.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2002-01-10