IBM RS6000 Service Guide - Page 104

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 "SP Checkpoints" on page 3-29. If you replace FRUs and the problem is still not corrected, go to "MAP 1540: Minimum Configuration" on page 2-17 unless otherwise indicated in the tables. Table 3-5 (Page 1 of 10). Firmware Checkpoints. Checkpoint Description E100 E101 E102 E103 E104 E105 E108 E109 E10A E10B E10C E10D E10E E10F E110 E111 E112 E113 E114 E115 Reserved Video enabled, extended memory test Firmware restart Set memory refresh (composite img) Set memory refresh (recovery block) Transfer control to Operating System (normal boot). Run recovery block base memory (test 2K), set stack Copy CRC verification code to RAM Turn on cache Flush cache Jump to CRC verification code in RAM Compute composite image CRC Jump back to ROM Transfer control to Open Firmware Turn off cache, Check if composite image CRC is valid GOOD CRC - jump to composite image BAD CRC - initialize base memory, stack BAD CRC - copy uncompressed recovery block code to RAM BAD CRC - jump to code in RAM BAD CRC - turn on cache Action/ Possible Failing FRU See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See "E1xx Code Boot Problems" on page 3-44. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. See the note on 3-29. 3-32 Service Guide