Backplane I/O; Connectors - HP Vectra Reference Manual

Backplane I/O
The backplane I/O channel supports accessory cards. Included in
the I/O channel support are 11-levels of interrupt and 7 DMA
channels. The I/O channel allows either 8-bit or 16-bit data bus
access, 24-bit memory address, control lines for memory and I/O,
refresh of dynamic memory, and wait-state generation.
I/O devices are addressed using I/O address space hex 100 to hex
3FF. The channel is designed so that 512 I/O device addresses are
available to the I/O channel accessory cards.
Connectors
The I/O channel connectors are located at the upper left of the
processor board. J1 and J6 only support 8-bit I/O devices. These
slots use 62-pin connectors. Slots J2, J3, J4, J5, and J7 each
consist of a 62-pin connector and a 36-pin connector. The
corresponding 36-pin connectors are J10,
J
11,
J
12,
J
13, and
J
15,
respectively. These five slots can be used for either 8-bit or 16-bit
I/O devices. Figure 11 shows the I/O channel connectors location.
28 Processor Board