A-16 Connector Pin Assignments
ISA CONNECTORS
Table A-19 lists connector pin assignments for the ISA connectors on the riser board.
Table A-19 ISA Bus Pin Assignments
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
B1
GND
A1
IOCHK –
B26
DACK2 –
A26
SA5
B2
RSTDRV
A2
SD7
B27
TC
A27
SA4
B3
Vcc
A3
SD6
B28
BALE
A28
SA3
B4
IRQ9
A4
SD5
B29
Vcc
A29
SA2
B5
– 5 V
A5
SD4
B30
OSC
A30
SA1
B6
DRQ2
A6
SD3
B31
GND
A31
SA0
B7
– 12 V
A7
SD2
KEY
KEY
B8
0WS –
A8
SD1
D1
MEMCS16 – C1
SBHE –
B9
+12 V
A9
SD0
D2
IOCS16 –
C2
LA23
B10
GND
A10
IOCHRDY
D3
IRQ10
C3
LA22
B11
SMEMW –
A11
AEN
D4
IRQ11
C4
LA21
B12
SMEMR –
A12
SA19
D5
IRQ12
C5
LA20
B13
IOW –
A13
SA18
D6
IRQ15
C6
LA19
B14
IOR –
A14
SA17
D7
IRQ14
C7
LA18
B15
DACK3 –
A15
SA16
D8
DACK0 –
C8
LA17
B16
DRQ3
A16
SA15
D9
DRQ0
C9
MEMR –
B17
DACK1 –
A17
SA14
D10
DACK5 –
C10
MEMW –
B18
DRQ1
A18
SA13
D11
DRQ5
C11
SD8
B19
REFRESH – A19
SA12
D12
DACK6 –
C12
SD9
B20
SYSCLK
A20
SA11
D13
DRQ6
C13
SD10
B21
IRQ7
A21
SA10
D14
DACK7 –
C14
SD11
B22
IRQ6
A22
SA9
D15
DRQ7
C15
SD12
B23
IRQ5
A23
SA8
D16
Vcc
C16
SD13
B24
IRQ4
A24
SA7
D17
Master –
C17
SD14
B25
IRQ3
A25
SA6
D18
GND
C18
SD15