Intel 273246-002 manual Poststatusvideorom

BIOS Quick Reference

POST_STATUS_VIDEOROM	2ch	Passing control to video ROM.
POST_STATUS_POSTVIDEO	2dh	Control returned from video ROM.
POST_STATUS_CHECKEGAVGA	2eh	Check for EGA/VGA adapter.
POST_STATUS_TESTVIDEOMEMORY	2fh	No EGA/VGA found, test video memory.
POST_STATUS_RETRACE	30h	Scan for video retrace signal.
POST_STATUS_ALTDISPLAY	31h	Primary retrace failed.
POST_STATUS_ALTRETRACE	32h	Alternate found.
POST_STATUS_VRFYSWADAPTER	33h	Verify video switches.
POST_STATUS_SETDISPMODE	34h	Establish display mode.
POST_STATUS_CHECKSEG40A	35h	Initialize ROM BIOS data area.
POST_STATUS_SETCURSOR	36h	Set cursor for power-on msg.
POST_STATUS_PWRONDISPLAY	37h	Display power-on message.
POST_STATUS_SAVECURSOR	38h	Save cursor position.
POST_STATUS_BIOSIDENT	39h	Display BIOS identification string.
POST_STATUS_HITDEL	3ah	Display "Hit <DEL> to ..." message.
POST_STATUS_VIRTUAL	40h	Prepare protected mode test.
POST_STATUS_DESCR	41h	Prepare descriptor tables.
POST_STATUS_ENTERVM	42h	Enter virtual mode for memory test.
POST_STATUS_ENABINT	43h	Enable interrupts for diagnostics mode.
POST_STATUS_CHECKWRAP1	44h	Initialize data for memory wrap test.
POST_STATUS_CHECKWRAP2	45h	Test for wrap, find total memory size.
POST_STATUS_HIGHPATTERNS	46h	Write extended memory test patterns.
POST_STATUS_LOWPATTERNS	47h	Write conventional memory test patterns.
POST_STATUS_FINDLOWMEM	48h	Find low memory size from patterns.
POST_STATUS_FINDHIMEM	49h	Find high memory size from patterns.
POST_STATUS_CHECKSEG40B	4ah	Verify ROM BIOS data area again.
POST_STATUS_CHECKDEL	4bh	Check for <DEL> pressed.
POST_STATUS_CLREXTMEM	4ch	Clear extended memory for soft reset.
POST_STATUS_SAVEMEMSIZE	4dh	Save memory size.
POST_STATUS_COLD64TEST	4eh	Cold boot: Display 1st 64KB memtest.
POST_STATUS_COLDLOWTEST	4fh	Cold boot: Test all of low memory.
POST_STATUS_ADJUSTLOW	50h	Adjust memory size for EBDA usage.
POST_STATUS_COLDHITEST	51h	Cold boot: Test high memory.
POST_STATUS_REALMODETEST	52h	Prepare for shutdown to real mode.
POST_STATUS_ENTERREAL	53h	Return to real mode.
POST_STATUS_SHUTDOWN	54h	Shutdown successful.
POST_STATUS_DISABA20	55h	Disable A20 line.
POST_STATUS_CHECKSEG40C	56h	Check ROM BIOS data area again.
POST_STATUS_CHECKSEG40D	57h	Check ROM BIOS data area again.
POST_STATUS_CLRHITDEL	58h	Clear "Hit <DEL>" message.
POST_STATUS_TESTDMAPAGE	59h	Test DMA page register file.
POST_STATUS_VRFYDISPMEM	60h	Verify from display memory.
POST_STATUS_TESTDMA0BASE	61h	Test DMA0 base register.
POST_STATUS_TESTDMA1BASE	62h	Test DMA1 base register.
POST_STATUS_CHECKSEG40E	63h	Checking ROM BIOS data area again.
POST_STATUS_CHECKSEG40F	64h	Checking ROM BIOS data area again.
POST_STATUS_PROGDMA	65h	Program DMA controllers.
POST_STATUS_INITINTCTRL	66h	Initialize PICs.
POST_STATUS_STARTKBDTEST	67h	Start keyboard test.
POST_STATUS_KBDRESET	80h	Issue KB reset command.
POST_STATUS_CHECKSTUCKKEYS	81h	Check for stuck keys.
POST_STATUS_INITCIRCBUFFER	82h	Initialize circular buffer.
POST_STATUS_CHECKLOCKEDKEYS	83h	Check for locked keys.
POST_STATUS_MEMSIZEMISMATCH	84h	Check for memory size mismatch.
POST_STATUS_PASSWORD	85h	Check for password or bypass setup.

Celeron™ Processor Development Kit Manual 5-13