IBM RS/6000 7046 Service Manual page 78

Firmware Checkpoints
The following table contains a list of checkpoints issued by the firmware during
initialization.
Checkpoint Description
(hex)
E100 Reserved/Unused
E101 Video-enabled,
extended memory
test (Quick restart
path)
E102 Firmware restart
with cfg'd parms
(Quick restart path)
E103 Set memory refresh
(composite img)
E104 Set memory refresh
(recovery block)
E105 Transfer control to
O.S. (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
3-14
7046 Model B50 Service Guide
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Repair Action
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Boot Problems or Concerns" on page 3-27
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26
See "Unresolved problems" on page 3-26