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7521
Plus / N N/B MAINTENANCE
Plus / N N/B MAINTENANCE
7. Maintenance Diagnostics
7.2 Error Codes : Following is a list of error codes in sequent display on the PIO debug board.
SYSTEM SOFT BIOS:
CODE DESCRIPTION
37h Protected mode exit successful
38h Update keyboard output port to disable gate of A20
39h Setup cache controller
3Ah Test if 18.2Hz periodic working
3Bh Initialize BIOS data area at 40:0.
3Ch Initialize the hardware interrupt vector tabl
3Dh Search and init the Mouse
3Eh Update num lock status
3Fh OEM initialization of COMM and LPT ports
40h Configure the COMM and LPT ports
41h Initialize the floppies
42h Initialize the hard disk
43h OEM's init of PM with USB
44h Initialize additional ROMs
45h Update NUMLOCK status
46h Test for coprocessor installed
47h OEM's init of power management, (check SMI)
48h OEM functions before boot (PCMCIA, CardBus)
49h Dispatch to operation system boot
4Ah Jump into bootstrap code