Lenovo PC 300 IBM PC300 (Type 2169) - Hardware Maintenance Manual (September 2 - Page 141
IDE Cable Connector Signals
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IDE Cable Connector Signals Pin Signal Name I/O Pin Signal Name I/O 1 Host Reset O 21 DMA Request I 2 Ground N/A 22 Ground Power 3 Host Data 7 I/O 23 Host IOW O 4 Host Data 8 I/O 24 Ground Power 5 Host Data 6 I/O 25 Host IOR O 6 Host Data 9 I/O 26 Ground Power 7 Host Data 5 I/O 27 I/O Channel Ready I 8 Host Data 10 I/O 28 No Connection N/A 9 Host Data 4 I/O 29 DMA Acknowledge O 10 Host Data 11 I/O 30 Ground Power 11 Host Data 3 I/O 31 Host IRQ I 12 Host Data 12 I/O 32 No Connection N/A 13 Host Data 2 I/O 33 Host A1 O 14 Host Data 13 I/O 34 No Connection N/A 15 Host Data 1 I/O 35 Host A0 O 16 Host Data 14 I/O 36 Host A2 O 17 Host Data 0 I/O 37 Host CS0 O 18 Host Data 15 I/O 38 Host CS1 O 19 Ground Power 39 ACTIVE bar I 20 No Connection N/A 40 Ground Power 139