HP X Class 500/550MHz HP Visualize X-Class 500MHz, 550MHz Technical Reference - Page 127

Initialize Run Time Clock, Boot to Mini DOS

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Tests and Error Messages Order in Which the Tests Are Performed Checkpoint Code E2h E3h E4h E5h E6h E7h E8h E9h EAh EBh ECh EDh EEh EFh F0h F1h F2h F3h F4h F5h F6h F7h POST Routine Description Initialize the CPU Initialize system timer Initialize system I/O Check force recovery boot Checksum BIOS ROM Go to BIOS Set Huge Segment Initialize Multi Processor Initialize OEM special code Initialize PIC and DMA Initialize Memory type Initialize Memory size Shadow Boot Block System memory test Initialize interrupt vectors Initialize Run Time Clock Initialize video Initialize beeper Initialize boot Clear Huge segment Boot to Mini DOS Boot to Full DOS Chapter 5 127

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Chapter 5
127
Tests and Error Messages
Order in Which the Tests Are Performed
E2h
Initialize the CPU
E3h
Initialize system timer
E4h
Initialize system I/O
E5h
Check force recovery boot
E6h
Checksum BIOS ROM
E7h
Go to BIOS
E8h
Set Huge Segment
E9h
Initialize Multi Processor
EAh
Initialize OEM special code
EBh
Initialize PIC and DMA
ECh
Initialize Memory type
EDh
Initialize Memory size
EEh
Shadow Boot Block
EFh
System memory test
F0h
Initialize interrupt vectors
F1h
Initialize Run Time Clock
F2h
Initialize video
F3h
Initialize beeper
F4h
Initialize boot
F5h
Clear Huge segment
F6h
Boot to Mini DOS
F7h
Boot to Full DOS
Checkpoint Code
POST Routine Description