IBM 2283, Hardware Maintenance Service

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Parts/Test Point Locations 133
IDE Cable Connector Signals
Pin
Signal
Name
I/O Pin
Signal
Name
I/O
1 Device
Reset I/O 21 DMARQ
(DMA
ReQuest) I
2 Ground 22 Ground
3 Data 7 I/O 23 Device IOW I/O
4 Data 8 I/O 24 Ground
5 Data 6 I/O 25 Device IOR I/O
6 Data 9 I/O 26 Ground
7 Data 5 I/O 27 I/O Channel
Ready I
8 Data 10 I/O 28 No
Connection
9 Data 4 I/O 29 DMACK
(DMA
aCKnowled
ge) O
10 Data 11 I/O 30 Ground
11 Data 3 I/O 31 INTRQ
(INTerrupt
ReQuest) I
12 Data 12 I/O 32 No
Connection
13 Data 2 I/O 33 Device A1 I/O
14 Data 13 I/O 34 No
Connection
15 Data 1 I/O 35 Device A0 I/O
16 Data 14 I/O 36 Device A2 I/O
17 Data 0 I/O 37 Device CS0 I/O
18 Data 15 I/O 38 Device CS1 I/O
19 Ground 39 DRIVE
ACTIVE bar
(Drive
Active/Slave
Present) I
20 No
Connection 40 Ground