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
The pin assignments are as follows :
| D18 |
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| D1 | B31 |
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| B1 | ||
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| C18 |
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| C1 |
| A31 |
| COMPONENT SIDE | A1 |
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| D |
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| PIN | ASSIGNMENT | PIN | ASSIGNMENT | PIN | ASSIGNMENT | PIN | ASSIGNMENT | |||
| B1 | GND | A1 | D1 | C1 | SBHE | |||||
| B2 | RESET | A2 | SD07 | D2 | C2 | LA23 | ||||
| B3 | +5V | A3 | SD06 | D3 | IRQ10 | C3 | LA22 | |||
| B4 | IRQ9 | A4 | SD05 | D4 | IRQ11 | C4 | LA21 | |||
| B5 | NC | A5 | SD04 | D5 | IRQ12 | C5 | LA20 | |||
| B6 | NC | A6 | SD03 | D6 | IRQ15 | C6 | LA19 | |||
| B7 | A7 | SD02 | D7 | IRQ14 | C7 | LA18 | ||||
| B8 | OWS | A8 | SD01 | D8 | C8 | LA17 | ||||
| B9 | +12V | A9 | SD00 | D9 | DRQ0 | C9 | ||||
| B10 | GND | A10 | D10 | C10 | ||||||
| B11 | A11 | AEN |
| D11 | DRQ5 | C11 | SD08 | |||
| B12 | A12 | SA19 | D12 | C12 | SD09 | |||||
| B13 | A13 | SA18 | D13 | DRQ6 | C13 | SD10 | ||||
| B14 | A14 | SA17 | D14 | C14 | SD11 | |||||
| B15 | A15 | SA16 | D15 | DRQ7 | C15 | SD12 | ||||
| B16 | A16 | SA15 | D16 | +5V | C16 | SD13 | ||||
| B17 | A17 | SA14 | D17 | C17 | SD14 | |||||
| B18 | A18 | SA13 | D18 | GND | C18 | SD15 | ||||
| B19 | A19 | SA12 |
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| B20 | BCLK | A20 | SA11 |
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| B21 | IRQ7 | A21 | SA10 |
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| B22 | NC | A22 | SA09 |
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| B23 | IRQ5 | A23 | SA08 |
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| B24 | IRQ4 | A24 | SA07 |
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| B25 | IRQ3 | A25 | SA06 |
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| B26 | NC | A26 | SA05 |
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| B27 | T/C | A27 | SA04 |
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| B28 | BALE | A28 | SA03 |
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| B29 | +5V | A29 | SA02 |
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| B30 | OSC | A30 | SA01 |
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| B31 | GND | A31 | SA00 |
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