Pinout of the ISA bus connector in easy view format

ISA Bus Pinout

The ISA bus is one of the most important functional parts of any IBM PC compatible. It offers a consistent interface to many different types of peripheral board. Although largely superseded today with PCi bus it is nonetheless a standard which cannot be ignored. The table below summarises the ISA bus in easy view format.

Signal Name	Pin	Pin	Signal Name
Ground	B1	A1	-I/O CH CK
RESET DRV	B2	A2	SD7
+5 V dc	B3	A3	SD6
IRQ 9	B4	A4	SD5
-5 V dc	B5	A5	SD4
DRQ2	B6	A6	SD3
-12 V dc	B7	A7	SD2
-0WS	B8	A8	SD1
+12 V dc	B9	A9	SD0
Ground	B10	A10	I/O CH RDY
-SMEMW	B11	A11	AEN
-SMEMR	B12	A12	SA19
-IOW	B13	A13	SA18
-IOR	B14	A14	SA17
-DACK3	B15	A15	SA16
DRQ3	B16	A16	SA15
-DACK1	B17	A17	SA14
DRQ1	B18	A18	SA13
-REFRESH	B19	A19	SA12
CLK	B20	A20	SA11
IRQ7	B21	A21	SA10
IRQ6	B22	A22	SA9
IRQ5	B23	A23	SA8
IRQ4	B24	A24	SA7
IRQ3	B25	A25	SA6
-DACK2	B26	A26	SA5
TC	B27	A27	SA4
BALE	B28	A28	SA3
+5 V dc	B29	A29	SA2
OSC	B30	A30	SA1
Ground	B31	A31	SA0
Key
-MEM CS16	D1	C1	-SBHE
-IO CS16	D2	C2	LA23
IRQ10	D3	C3	LA22
IRQ11	D4	C4	LA21
IRQ12	D5	C5	LA20
IRQ15	D6	C6	LA19
IRQ14	D7	C7	LA18
-DACK0	D8	C8	LA17
DRQ0	D9	C9	-MEMR
-DACK5	D10	C10	-MEMW
DRQ5	D11	C11	SD08
-DACK6	D12	C12	SD09
DRQ6	D13	C13	SD10
-DACK7	D14	C14	SD11
DRQ7	D15	C15	SD12
+5 V dc	D16	C16	SD13
-MASTER	D17	C17	SD14
Ground	D18	C18	SD15

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