Test

Beep POST Routine Description

Point

Code

 

 

 

E8h

 

Set huge segment

 

 

 

E9h

 

Initialize multi processor

 

 

 

EAh

 

Initialize OEM special code

 

 

 

EBh

 

Initialize PIC and DMA

 

 

 

ECh

 

Initialize memory type

 

 

 

EDh

 

Initialize memory size

 

 

 

EEh

 

Shadow Boot Block

 

 

 

EFh

 

Initialize System Management Mode

 

 

 

F0h

 

System memory test

 

 

 

F1h

 

Initialize interrupt vectors

 

 

 

F2h

 

Initialize Run Time Clock

 

 

 

F3h

 

Initialize video

 

 

 

F4h

 

Output one beep

 

 

 

F5h

 

Initialize boot configuration

 

 

 

F6h

 

Clear huge segment

 

 

 

F7h

 

Boot to O.S. (Mini DOS)

 

 

 

F8h

 

Initialize USB controller

 

 

 

*If the BIOS detects error 2C or 2E, it displays an additional word-bitmap (xxxx) indicating the address line or bits that failed. For example, “2C 0002” means address line 1 (bit one set) has failed. “2E 1020” means data bits 12 and 5 (bits 12 and 5 set) have failed in the lower 16 bits.

Troubleshooting 93