IBM 5170 Technical Reference page 38

I/O Pin Signal Name
I/O
8 1 GND
Ground
82 RESET DRV
0
83 +5 Vdc
Power
84 IR09
I
85 -5Vdc
Power
86 DR02
I
87
-12 Vdc
Power
88
OWS
I
89 +12 Vdc
Power
810 GND
Ground
811 -SMEMW
0
812 -SMEMR
0
813 -lOW
I/O
814
815
-lOR
-DACK3
I/O
0
816 DR03 I
817 -DACK1
0
818 DR01
I
819 -Refresh
I/O
820 ClK
0
821 IRQ7 I
822 IR06
I
823
IR05
I
824 IR04
I
825 IR03
I
826 -DACK2
0
827
T/C
0
828 8AlE 0
829 +5Vdc
Power
830
OSC 0
831 GND
Ground
I/O Channel (B-Side J1, through J8)
1-20 System Board