B-12 Connector Pin Assignments
ISA EXPANSION BUS CONNECTOR PIN ASSIGNMENTS
The expansion slots signals, voltages, and grounds are supplied through the bus connectors.
Table B-13 provides the pin assignments for the ISA expansion slots.
Table B-13 ISA Expansion Slot Pin Assignments
Pin
Direction
Signal
Pin
Direction
Signal
A1
Input
IOCHCK#
B1
Ground
GND
A2
Input/Output
SD7
B2
Reset
RESDRV
A3
Input/Output
SD6
B3
Power
+5V
A4
Input/Output
SD5
B4
Input
IRQ09
A5
Input/Output
SD4
B5
Power
-5V
A6
Input/Output
SD3
B6
Input
DRQ2
A7
Input/Output
SD2
B7
Power
-12V
A8
Input/Output
SD1
B8
Input
SRDY#(N0WS#)
A9
Input/Output
SD0
B9
Power
+12V
A10
Input
IOCHRDY
B10
Ground
GND
A11
Output
AEN
B11
Output
SMEMW#
(SMWTC#)
A12
Input/Output
SA19
B12
Output
SMEMR#
(SMRDC#)
A13
Input/Output
SA18
B13
Input/Output
IOW# (IOWC#)
A14
Input/Output
SA17
B14
Input/Output
IOR# (IOWC#)
A15
Input/Output
SA16
B15
Output
DACK3#
A16
Input/Output
SA15
B16
Input
DRQ3
A17
Input/Output
SA14
B17
Output
DACK1
A18
Input/Output
SA13
B18
Input
DRQ1
A19
Input/Output
SA12
B19
Input/Output
REFRESH#
A20
Input/Output
SA11
B20
Output
BCLK
A21
Input/Output
SA10
B21
Input
IRQ7
A22
Input/Output
SA9
B22
Input
IRQ6
A23
Input/Output
SA8
B23
Input
IRQ5
A24
Input/Output
SA7
B24
Input
IRQ4
A25
Input/Output
SA6
B25
Input
IRQ3
A26
Input/Output
SA5
B26
Output
DACK2#
A27
Input/Output
SA4
B27
Output
TC
A28
Input/Output
SA3
B28
Output
BALE
A29
Input/Output
SA2
B29
Power
+5V
Summary of Contents for DIRECTION L - SERVICE
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