IBM 8479 User Reference - Page 77
Control/Data, Input/Output
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Table 10. 68-pin SCSI connector pin-number assignments. Pin Signal 1 +Data 12 2 +Data 13 3 +Data 14 4 +Data 15 5 +Data P1 6 +Data 0 7 +Data1 8 +Data 2 9 +Data 3 10 +Data 4 11 +Data 5 12 +Data 6 13 +Data 7 14 +Data P 15 Ground 16 DIFFSENS 17 Term power 18 Term power 19 Reserved 20 Ground 21 +Attention 22 Ground 23 +Busy 24 +Acknowledge 25 +Reset 26 +Message 27 +Select 28 +Control/Data 29 +Request 30 +Input/Output 31 +Data 8 32 +Data 9 33 +Data 10 34 +Data 11 Pin Signal 35 -Data 12 36 -Data 13 37 -Data 14 38 -Data 15 39 -Data P1 40 -Data 0 41 -Data 1 42 -Data 2 43 -Data 3 44 -Data 4 45 -Data 5 46 -Data 6 47 -Data 7 48 -Data P 49 Ground 50 Ground 51 Term power 52 Term power 53 Reserved 54 Ground 55 -Attention 56 Ground 57 -Busy 58 -Acknowledge 59 -Reset 60 -Message 61 -Select 62 -Control/Data 63 -Request 64 -Input/Output 65 -Data 8 66 -Data9 67 -Data 10 68 -Data 11 Chapter 5. Installing options 63