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American Megatrends Manuals
Motherboard
43 Series
User manual
J1 - J13 Isa Bus Connectors - American Megatrends 43 Series User Manual
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Detailed Description of Connectors
J1 - J13 ISA Bus Connectors
J1 - J13 are the ISA compatible slots, J1 - J7 are the 8-bit slots and J8 - J13 are the 16-bit extension slots. The ISA Bus operates at ½ the CPU speed. If the
motherboard has a 16 MHz 80386SX, the ISA Bus operates at 8 MHz.
8-Bit ISA Slot Pinout
Pin
Use
A1
IOCHCK-
A2
SD07
A3
SD06
A4
SD05
A5
SD04
A6
SD03
A7
SD02
A8
SD01
A9
SD00
A10
IOCHRDY
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
Pin
Use
B1
GND
B2
RSTDRV
B3
+5
B4
IRQ9
B5
-5
B6
DREQ2
B7
-12
B8
OWS-
B9
+12
B10
GND
B11
SMEMW-
B12
SMEMR-
B13
IOW-
B14
IOR-
B15
DACK3-
B16
DREQ3
B17
DACK1-
B18
DREQ1
B19
REF-
B20
SYSCLK
B21
IRQ7
B22
IRQ6
B23
IRQ5
B24
IRQ4
B25
IRQ3
B26
DACK2-
B27
T/C
B28
BALE
B29
+5
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