Intel 440BX

Intel
®
440Bx Scalable Performance Board Development Kit Manual 53
BIOS Quick Reference
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.
POST_STATUS_BEFORESETUP 86h Password accepted.