Expansion Ports; System Expansion Bus - Tandy 1000 SL Technical Reference Manual

Expansion Ports
System Expansion Bus
This section identifies the 1/0 interface requirements for the 8-
bit, PC-compatible option cards. Each of the five slots has a 62-
pin connector socket.
The following connector pin assignment is used on the PC option
slots; this connector socket has 62 pins.
Pin
A1
A2
A3
A4
A5
A6
A7
A8
A9
A1
0
A1 1
A1 2
A13
A14
A15
A1 6
A17
A18
A1 9
A20
A2 1
A22
A2 3
A2 4
A25
A2 6
A2 7
A28
A2 9
A30
A31
-
Signal Name
NMI-
IOD7
IOD6
IOD5
IOD4
IOD3
IOD2
IODl
IODO
IOCHRDY
HLDA
A1 9
A1 8
A1 7
A1 6
A1
5
A1 4
A1 3
A1 2
A1 1
A1
0
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
-
I/O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
pin -
B 1
B 2
B 3
B 4
B 5
B 6
B 7
B 8
B 9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B2 0
B2 1
B2 2
B2 3
B2 4
B2 5
B2 6
B2 7
B2 8
B2 9
B3 0
B3 1
Signal Name
GND
RE SET
+5
v
IRQ2
-5V
DRQ2
-1 2v
N/C
+12v
GND
MEMW-
MEMR-
IOW-
IOR-
DACK3-
DRQ 3
DRQ 1
REFRSH-
BCPUCL
DACKI-
IRQ7
IRQ6
IRQ5
IRQ 4
IRQ3
DACK2-
DMATC
BUSALE
+5v
14MHz
GND
-
I / O
GROUND
0
POWER
I
POWER
I
POWER
POWER
GROUND
0
0
0
0
0
I
0
I
0
0
I
I
I
I
I
0
0
0
POWER
0
GROUND
20