IBM H Series Installation And Service Manual page 160

Firmware Checkpoints
Firmware uses progress codes (checkpoints) in the range of E1xx to EFFF. These
checkpoints occur during system startup and maybe be useful in diagnosing certain
problems. Service Processor checkpoints are listed in "Model H50 Service
Processor Checkpoints" on page 3-45.
If you replace FRUs and the problem is still not corrected, go to "MAP 1540:
Minimum Configuration" on page 2-37 unless otherwise indicated in the tables.
Table 3-8 (Page 1 of 10). Firmware Checkpoints.
Checkpoint Description
E100 Reserved
E101 Video enabled, extended memory
test
E102 Firmware restart
E103 Set memory refresh (composite img)
E104 Set memory refresh (recovery block)
E105 Transfer control to Operating
System (normal boot).
E108 Run recovery block base memory
(test 2K), set stack
E109 Copy CRC verification code to RAM
E10A Turn on cache
E10B Flush cache
E10C Jump to CRC verification code in
RAM
E10D Compute composite image CRC
E10E Jump back to ROM
E10F Transfer control to Open Firmware
E110 Turn off cache, Check if composite
image CRC is valid
E111 GOOD CRC - jump to composite
image
E112 BAD CRC - initialize base memory,
stack
E113 BAD CRC - copy uncompressed
recovery block code to RAM
E114 BAD CRC - jump to code in RAM
E115 BAD CRC - turn on cache
3-52
RS/6000 Enterprise Server Model H Series Installation and Service Guide
Action/
Possible Failing FRU
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See "Boot Problems and Concerns"
on page 3-65.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.
See the note on 3-45.