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Appendix A Expansion Bus
ISA BUS PIN ASSIGNMENT
There are two edge connector (called "gold fingers") on this CPU Card, on the
right hand is the connector of ISA Bus, followed up by PCI BUS connector. The
ISA-bus connector is divided into two sets: one consists of 62 pins; the other
consists of 36 pins.
The pin assignments are as follows :
D18
C18
B
PIN
ASSIGNMENT
B1
GND
B2
RESET
B3
+5V
B4
IRQ9
B5
NC
B6
NC
B7
-12V
B8
OWS
B9
+12V
B10
GND
B11
-SMEMW
B12
-SMEMR
B13
-IOW
B14
-IOR
B15
-DACK3
B16
-DRQ3
B17
-DACK1
B18
-DRQ1
B19
-REFRESH
B20
BCLK
B21
IRQ7
B22
NC
B23
IRQ5
B24
IRQ4
B25
IRQ3
B26
NC
B27
T/C
B28
BALE
B29
+5V
B30
OSC
B31
GND
Page: A-2
B31
D1
C1
A31
A
PIN
ASSIGNMENT
A1
-I/O CH CHK
A2
SD07
A3
SD06
A4
SD05
A5
SD04
A6
SD03
A7
SD02
A8
SD01
A9
SD00
A10
-I/O CH RDY
A11
AEN
A12
SA19
A13
SA18
A14
SA17
A15
SA16
A16
SA15
A17
SA14
A18
SA13
A19
SA12
A20
SA11
A21
SA10
A22
SA09
A23
SA08
A24
SA07
A25
SA06
A26
SA05
A27
SA04
A28
SA03
A29
SA02
A30
SA01
A31
SA00
COMPONENT SIDE
D
PIN
ASSIGNMENT
D1
-MEMCS16
D2
-I/OCS16
D3
IRQ10
D4
IRQ11
D5
IRQ12
D6
IRQ15
D7
IRQ14
D8
-DACK0
D9
DRQ0
D10
-DACK5
D11
DRQ5
D12
-DACK6
D13
DRQ6
D14
-DACK7
D15
DRQ7
D16
+5V
D17
-MASTER
D18
GND
PSB-1688LF USER
B1
A1
C
PIN
ASSIGNMENT
C1
SBHE
C2
LA23
C3
LA22
C4
LA21
C5
LA20
C6
LA19
C7
LA18
C8
LA17
C9
-MEMR
C10
-MEMW
C11
SD08
C12
SD09
C13
SD10
C14
SD11
C15
SD12
C16
SD13
C17
SD14
C18
SD15
'
S MANUAL
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