HP 400 Series Servicing Manual page 34

•
An optional HP-IB interface board may also be included.
•
An optional HP-IB interface board may also be included.
1-12 Product Overview
DIO-II Model 400s systems have the following components:
– Power supply
– Motherboard with two DIO-II slots
– Additional 3-slot DIO-II backplane
– CPU board with attached emulator board and memory modules
– Graphics controller or interface board
– Mass storage devices
ISA Model 400s systems have the following components:
– Power supply
– Motherboard with two DIO-II slots
– Additional 4-slot ISA backplane that includes support for the Apollo To-
ken Ring network board
– CPU board with attached emulator board and memory modules
– Graphics board
– Mass storage devices