Appendix A. Firmware Checkpoint Three-Digit Codes
These three digit codes will appear to the left of the top row on the Liquid Crystal
Display(LCD) which is located on the front panel of the system. The intended use of
the three digit codes is to assure the observer that the Firmware is operational after
power on, and before information appears on the console display; there is no other
diagnostic intent implied by the values of the three digit codes. If an Fxx code
requires any action, it will be listed in Chapter 3, “Error Code to FRU Index” on
page 3-1.
Checkpoint
(hex)
Description
F00 Manufacturing - Reserved for Parallel port download protocol
F01 Clear the EPOW register
F02 Determine system bus speed, set ISA divisor
F04 Set memory refresh
F06 Jump to set environment or check flash
F08 Run recovery block base memory, test 2k, then set stack
F09 Copy CRC verification code to RAM
F0A Turn on cache
F0B Flush cache
F0C Jump to CRC verification code in RAM
F0D Compute composite image CRC
F0E Jump back to ROM
F0F Turn off cache
F10 Check if composite image CRC is valid
F11 GOOD CRC - jump to composite image
F12 BAD CRC - initialize base memory, stack
F13 BAD CRC - copy uncompressed recovery block code to RAM
F14 BAD CRC - jump to code in RAM
F15 BAD CRC - turn on cache
F16 BAD CRC - copy recovery block data section to RAM
F17 BAD CRC - Invalidate and flush cache, set TOC
F18 BAD CRC - branch to high level recovery control routine
F19 Initialize base memory, stack
F1A Copy uncompressed recovery block code to RAM
F1B Jump to code in RAM
F1C Turn on cache
F1D Copy recovery block data section to RAM
F1E Invalidate and flush cache, set TOC
F1F Branch to high level control routine
F20 Initialize System I/O
F21 Run a console diagnostic routine
F22 No memory found
F23 No DIMM found in the socket
F24 Remove bad DIMM found from DIMM information
F25 Unsupported DIMM detected
F26 Check valid image - start
F27 Check valid image - successful
F28 Wait for interrupt
Appendix A. Firmware Checkpoint Three-Digit Codes A-1
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