BIOS Setup Information
ROBO-638 User’s Manual
4-19
Code Description
D0
NMI is disabled. CPU ID saved. INIT code checksum verification will be
started.
D1
Initializing the DMA controller, performing the keyboard controller BAT
test, starting memory refresh, and going to 4GB flat mode.
D3
To start memory sizing.
D4
Returning to real mode. Executing any OEM patches and setting the stack
next.
D5
Passing control to the uncompressed code in shadow RAM at E000:0000h.
The INIT code is copied to segment 0 and control will betransferred to
segment 0.
D6
Control is in segment 0. Next, checking if <Ctrl><Home> was pressed and
verifying the system BIOS checksum.
If either <Ctrl><Home> was pressed or the system BIOS checksum is bad,
next will go to checkpoint code E0h.
Otherwise, going to checkpoint code D7h.
D7
To pass control to interface module.
D8
Main BIOS runtime code is to be decompressed.
D9
Passing control to the main system BIOS in shadow RAM next.
Bootblock Recovery Codes
— The bootblock recovery checkpoint hex
codes are listed in order of execution :
Code Description
E0
The onboard floppy controller if available is initialized. Next, beginning the
base 512KB memory test.
E1
Initializing the interrupt vector table next.
E2
Initializing the DMA and Interrupt controllers next.
E6
Enabling the floppy drive controller and Timer IRQs. Enabling internal cache
memory.
ED
Initializing the floppy drive.
EE
Start looking for a diskette in drive A: and read first sector of the diskette.
EF
A read error occurred while reading the floppy drive in drive A: .
F0
Next, searching for the AMIBOOT.ROM file in the root directory.
F1
The AMIBOOT.ROM file is not in the root directory.
F2
Next, reading and analyzing the floppy diskette FAT to find the clusters
occupied by the AMIBOOT.ROM file.
F3
Start reading AMIBOOT.ROM file, cluster by cluster.
F4
The AMIBOOT.ROM file is not the correct size.
F5
Next, disabling internal cache memory.
FB
Next, detecting the type of Flash ROM.
FC
Erasing the Flash ROM.
FD
Programming the Flash ROM
FF
Flash ROM programming was successful. Next, restarting the system BIOS.
