HP 9020 Service Manual page 233

Appendix
E
I/O Backplane Pinout Data
Figure
E-l is a layout drawing of the computer 110 backplane. It identifies all 110 backplane
connectors and shows every pin and its corresponding signal name. Table
E-l
lists every
liD
backplane connector and its usage. Table E-2 lists all the signal names used on the 110 backplane
and their definitions.
Table
E-l.
I/O Backplane Connectors
Designator Connecting Assembly
PI Display Interface Module (Power)
P2
Display Interface Module (lOP)
P3 110 Card
P4 110 Card
P5 110 Card
P6 110 Card
P7 Reserved
P8 Reserved
P9 Reserved
PIO Mass Storage Controller Card
PII Mass Storage Controller Card
JI2 Motherboard
PI3 Reserved
PI4 110 Cage Door Switch
E-l