ISA Connectors
The system board ISA connectors follow the standard pinout given in the ISA Specification.
Pin | Signal | Pin | Signal | Pin | Signal | Pin | Signal |
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A1 | IOCHK_L | B1 | GND | C1 | SBHE_L | D1 | MEMCS16_L |
A2 | SD7 | B2 | RSTDRV | C2 | LA23 | D2 | IOCS16_L |
A3 | SD6 | B3 | +5 V dc | C3 | LA22 | D3 | IRQ10 |
A4 | SD5 | B4 | IRQ9 | C4 | LA21 | D4 | IRQ11 |
A5 | SD4 | B5 | C5 | LA20 | D5 | IRQ12 | |
A6 | SD3 | B6 | DRQ2 | C6 | LA19 | D6 | IRQ15 |
A7 | SD2 | B7 | C7 | LA18 | D7 | IRQ14 | |
A8 | SD1 | B8 | SRDY_L | C8 | LA17 | D8 | DACK0_L |
A9 | SD0 | B9 | +12 V dc | C9 | MEMR_L | D9 | DRQ0 |
A10 | IOCHRDY | B10 | GND | C10 | MEMW_L | D10 | DACK5_L |
A11 | AEN | B11 | SMEMW_L | C11 | SD8 | D11 | DRQ5 |
A12 | SA19 | B12 | SMEMR_L | C12 | SD9 | D12 | DACK6_L |
A13 | SA18 | B13 | IOW_L | C13 | SD10 | D13 | DRQ6 |
A14 | SA17 | B14 | IOR_L | C14 | SD11 | D14 | DACK7_L |
A15 | SA16 | B15 | DACK3_L | C15 | SD12 | D15 | DRQ7 |
A16 | SA15 | B16 | DRQ3 | C16 | SD13 | D16 | +5 V dc |
A17 | SA14 | B17 | DACK1_L | C17 | SD14 | D17 | Master16_L |
A18 | SA13 | B18 | DRQ1 | C18 | SD15 | D18 | GND |
A19 | SA12 | B19 | REFRESH_L |
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A20 | SA11 | B20 | SYSCLK |
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A21 | SA10 | B21 | IRQ7 |
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A22 | SA9 | B22 | IRQ6 |
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A23 | SA8 | B23 | IRQ5 |
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A24 | SA7 | B24 | IRQ4 |
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A25 | SA6 | B25 | IRQ3 |
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A26 | SA5 | B26 | DACK2_L |
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A27 | SA4 | B27 | TC |
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A28 | SA3 | B28 | BALE |
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A29 | SA2 | B29 | +5 V dc |
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A30 | SA1 | B30 | +OSC |
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A31 | SA0 | B31 | GND |
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194 | Chapter 9 I/O Ports and Connectors |