Appendix A
24
(CC)NMI handler shutdown.
(CD)BAT command to keyboard controller is to be issued.
(CE)Keyboard controller BAT result verified. Any initialization after KB controller.
(CF)Initialization after KB controller BAT done. Keyboard command byte to be
(D0)Entry to clear memory routine.
(D0)Interrupt handler error.(Beep)=4
(D1)Keyboard controller command byte is written. Going to check pressing of
(D2)Checking for pressing of <INS>key during power
on done. Going to disable
DMA and Interrupt controllers.
(D2)Ready to clear extended memory.
(D2)Unknown interrupt error.(Beep)=4
(D3)DMA controller #1,#2,int
errupt controller #1,#2 disable. Video display is
disable and port-
B is initialized. Chipset initialize/auto memory detection about to
(D3)Ready to reset back to real mode.
(D4)Chipset Initialization/auto memory detection about to begin
ready to clear real mode.
(D4)Pending interrupt error.(Beep)=4
(D6)Initialize option ROM error.(Beep)4
error.(Beep)=4-2-3-1.(DA)Extended Block Move.(Beep)=4 -2-3-
(DD)Transfer control to un
compressed code in shadow ram at F000:FFF0.
(E0)Ready to replace E000 ROM.
(E0)Initialize the chipset.
(E1)Completed E000 ROM replacement.
(E1)Initialize the bridge.
(E2)Ready to replace EGA ROM.
(E2)Initialize the motherboard chipset, and CPU.(Beep)=4
(E3)Completed EGA ROM replacement.
(E3)Initialize refresh counter and system timer(Beep)=4
(E4)Check for forced Flash or initialize system I/O.(Beep)= 4
status of ROM or check force recovery boot.(Beep)4-3-2-
OK. (Beep) =4-3-2-
3. (E7) Do a complete RAM Test or go to BIOS.
(Beep)=4-3-2-4. (E8)Do OEM initialization or set huge segment. (Beep)=4-3-3-
(E9) Initialize interrupt controller or initialize multi processor. (Beep)=4-3-3-
(EA)Read in bootstrap code or initialize OEM special code. (Beep)=4-3 -3-
Initialize all vectors or initialize PIC and DMA. (Beep)=4-3-3-
Flash program or initialize memory type. (Beep)=4-3-4-
1. (ED) Initialize the boot
device or initialize memory size. (Beep)=4
(EE)Unexpected Processor exception.
(EE)Boot code was read OK or shadow boot block.(Beep)= 4
(F0)Initialize interrupt vectors.(F1)Initialize Run Time Clock. (F2) Initialize video.
(F3)Initialize System Management Mode.(F4)Output one beep before
DOS.(F5)Boot to Mini DOS.(F6)Clear Huge Segment.(F7)Boot to Full DOS.
(FF)System booting. This means that the BIOS already passed control to the
operation system.
If no error flags such as memory size are set ,boot via INT
19-
load system from drive A, then C; display error message if correct boot device
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