Appendix II: Post Error Code for BIOS
A26361-D1691-Z120-1-7619, Edition 1 63
POST (hex) Description
67h:
Prepare memory size information for function call: INT 15h ax=E820h
69h:
Turn on L2 cache
6Bh:
Program chipset registers according to items described in Setup & Auto-
configuration table.
6Dh: 1. Assign resources to all ISA PnP devices.
2. Auto assign ports to onboard COM ports if the corresponding item in Setup is
set to "AUTO".
6Fh: 1. Initialize floppy controller
2. Set up floppy related fields in 40:hardware.
75h: Detect & install all IDE devices: HDD, LS120, ZIP, CDROM…..
76h:
(Optional Feature)
Enter AWDFLASH.EXE if:
– AWDFLASH.EXE is found in floppy drive.
– ALT+F2 is pressed.
77h: Detect serial ports & parallel ports.
7Ah: Detect & install co-processor
7Ch:
Init HDD write protect.
7Fh:
Switch back to text mode if full screen logo is supported.
– If errors occur, report errors & wait for keys
– If no errors occur or F1 key is pressed to continue:
w Clear EPA or customization logo.
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