IOPM Boot Strategy
Norman C. Woo
March 5, 1989
ARIX Corporation - CONFIDENTIAL
This document is a description how an IOPM based System 90 will perform its initial
boot. The major objective is be flexible so that future new 110 Processor Modules
and Device Boards can be easily adapted into existing systems.
2. Theory of Operation
The IOPM will automatically execute the power-on confidence tests, a series of
EPROM based tests, every time it is reset. These tests will begin by checking the
CPU, checksum the EPROM, test the RAM, the CSS bus interface, and then the
interrupt mechanism. Once completed the appropriate LEDs will be set. The IOPM
will interrupt the Service Module if the confidence tests did not detect any fault and
will wait for further commands from the Service Module or any intelligent modules.
In the event of finding any|