Fail-Safe Loader - Digital Equipment DIGITAL Ultimate Workstation 533 Service Manual

2.10 Fail-Safe Loader

The fail-safe loader is a software routine that loads the SRM console image from
floppy. Once the console is running you will want to run LFU to update
FEPROM 0 with a new image.
NOTE: FEPROM 0 contains images of the SROM, XSROM, PAL, decompression,
and SRM console code.
If the fail-safe loader loads, the following conditions exist on the machine:
•
The SROM has passed its tests and successfully unloaded the XSROM. If the
SROM fails to unload both copies of XSROM, it reports the failure to the
control panel display and COM1 if possible, and the system hangs.
•
The XSROM has completed its B-cache and memory tests but has failed to
unload the PALcode in FEPROM 0 sector 1 or the SRM console code.
•
The XSROM reports the errors encountered and loads the fail-safe loader.
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