Category: BIOS
INT 15 - SYSTEM - POWER-ON SELF-TEST ERROR LOG (PS50+) AH = 21h AL = subfunction 00h read POST log 01h write POST log BH = device ID BL = error code Return: CF clear if successful CF set on error AH = status 00h OK 01h list full 02h unsupported subfunction 80h invalid command 86h unsupported function if function 00h: BX = number of error codes stored ES:DI -> error log Notes: the log is a series of words, the first byte of which identifies the error code and the second the device. supported by AMI PCI BIOS IBM considers this a required BIOS function if the device ID is FFh, the "error code" is the actual device number minus 255 (thus these devices have no specific error codes) SeeAlso: AH=23h"SYSTEM",AH=24h"SYSTEM"