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E1h Initialize the bridge.
E2h Initialize the CPU.
E3h Initialize system timer.
E4h Initialize system I/O.
E5h Check force recovery boot.
E6h Checksum BIOS ROM.
E7h Go to BIOS.
E8h Initialize Multi-Processor
E9h Set huge segment.
EAh Initialize OEM special code.
EBh Initialize PIC and DMA.
ECh Initialize Memory type.
EDh Initialize Memory size.
EEh Shadow Boot Block.
EFh System memory test.
F0h Initialize interrupt vectors.
F1h Initialize Run Time Clock.
F2h Initialize video.
F3h Initialilze System Management Mode.
F4h Output one beep.
F5h Boot to Mini DOS.
F6h Clear Huge Segment.
F7h Boot to Full DOS.
Checkpoint
Code
Beep Code Description
BB!S421!.!FO/cppl!!Qbhf!46!!Gsjebz-!Nbsdi!23-!3115!!5;1:!QN