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IDE connectors
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139
Table 23. IDE connector pin assignments
Pin | Signal | I/O | Pin | Signal | I/O |
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1 | RESET | O | 21 | NC | N/A |
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2 | Ground | N/A | 22 | Ground | N/A |
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3 | Data bus bit 7 | I/O | 23 | I/O write | O |
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4 | Data bus bit 8 | I/O | 24 | NC | N/A |
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5 | Data bus bit 6 | I/O | 25 | I/O read | O |
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6 | Data bus bit 9 | I/O | 26 | Ground | I |
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7 | Data bus bit 5 | I/O | 27 | I/O channel ready | I |
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8 | Data bus bit 10 | I/O | 28 | ALE | O |
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9 | Data bus bit 4 | I/O | 29 | NC | N/A |
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10 | Data bus bit 11 | I/O | 30 | Ground | N/A |
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11 | Data bus bit 3 | I/O | 31 | IRQ | I |
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12 | Data bus bit 12 | I/O | 32 | CS16# | I |
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13 | Data bus bit 2 | I/O | 33 | SA1 | O |
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14 | Data bus bit 13 | I/O | 34 | PDIAG# | I |
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15 | Data bus bit 1 | I/O | 35 | SA0 | O |
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16 | Data bus bit 14 | I/O | 36 | SA2 | O |
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17 | Data bus bit 0 | I/O | 37 | CS0# | O |
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18 | Data bus bit 15 | I/O | 38 | CS1 | O |
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19 | Ground | N/A | 39 | Active# | I |
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20 | Key (Reserved) | N/A | 40 | Ground | N/A |
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42PC 300 GL and 300 PL