Appendix A. Connector Pin Assignments
Figure 27 (Page 2 of 3). ISA Connector Pin Assignments
Pin
Signal
I/O
Pin
Signal
I/O
B3
+5 V DC
NA
A3
SD6
I/O
B4
IRQ2
I
A4
SD5
I/O
B5
-5 V DC
NA
A5
SD4
I/O
B6
DRQ2
I
A6
SD3
I/O
B7
-12 V DC
NA
A7
SD2
I/O
B8
OWS#
I
A8
SD1
I/O
B9
+12 V DC
NA
A9
SD0
I/O
B10
Ground
NA
A10
IOCHRDY
I
B11
SMEMW#
O
A11
AEN
O
B12
SMEMR#
O
A12
SA19
I/O
B13
IOW#
I/O
A13
SA18
I/O
B14
IOR#
I/O
A14
SA17
I/O
B15
DACK3#
O
A15
SA16
I/O
B16
DRQ3
I
A16
SA15
I/O
B17
DACK1#
O
A17
SA14
I/O
B18
DRQ1
I
A18
SA13
I/O
B19
REFRESH#
I/O
A19
SA12
I/O
B20
CLK
O
A20
SA11
I/O
B21
IRQ7
I
A21
SA10
I/O
B22
IRQ6
I
A22
SA9
I/O
B23
IRQ5
I
A23
SA8
I/O
B24
IRQ4
I
A24
SA7
I/O
B25
IRQ3
I
A25
SA6
I/O
B26
DACK2#
O
A26
SA5
I/O
B27
TC
O
A27
SA4
I/O
B28
BALE
O
A28
SA3
I/O
B29
+5 V DC
NA
A29
SA2
I/O
B30
OSC
O
A30
SA1
I/O
B31
Ground
NA
A31
SA0
I/O
D1
MEMCS16#
I
C1
SBHE#
I/O
D2
IOCS16#
I
C2
LA23
I/O
D3
IRQ10
I
C3
LA22
I/O
D4
IRQ11
I
C4
LA21
I/O
D5
IRQ12
I
C5
LA20
I/O
D6
IRQ15
I
C6
LA19
I/O
D7
IRQ14
I
C7
LA18
I/O
D8
DACK0#
O
C8
LA17
I/O
D9
DRQ0
I
C9
MEMR#
I/O
D10
DACK5#
O
C10
MEMW#
I/O
D11
DRQ5
I
C11
SD8
I/O
D12
DACK6#
O
C12
SD9
I/O
D13
DRQ6
I
C13
SD10
I/O
D14
DACK7#
O
C14
SD11
I/O
Appendix A. Connector Pin Assignments
33
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