Appendix D POST LEDs 77
Code Name Description of check-point
51 Pre-boot enable Enable parity checker, enable NMI,
enable cache before boot.
52 Initiallze option ROMs Initialize any option ROMs present from
C8000h to EFFFFh.
Note: when fscan option is enabled, it
will initialize from C8000h to F7FFFh.
53 Initialize time value Initialize time value in 40h: BIOS area.
60 Set up virus protection Set up virus protection according to
setup.
61 Set boot speed Set system speed for boot.
62 Set numlock Set numlock status according to setup.
63 Boot attempt Set low stack boot via INT 19h.
B0 Spurious If interrupt occurs in protected mode.
B1 Unclaimed NMI If unmasked NMI occurs, display "Press
F1 to disable NMI, F2 to reboot".
BE Chipset default Program chipset registers with
initialization power-on BIOS defaults.
BF Chipset initialization Program chipset registers with setup
values.
C0 Turn off chipset cache OEM specific-cache control.
C1 Memory presence test OEM specific test to size onboard
memory.
C5 Early shadow OEM specific early shadow enable for
fast boot.
C6 Cache presence test External cache size detection test.
E1-EF Setup pages E1-page 1, E2-page2, etc.
FF Boot
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