Bootblock Recovery Code Checkpoint - Acer Altos G520 series User Manual

Bootblock Recovery Code Checkpoint

The bootblock recovery code gets control when the BIOS determines
that a BIOS recovery needs to occur because the user has forced the
update or the BIOS checksum is corrupt. The following table describes
the type of checkpoints that may occur during the Bootblock recovery
portion of the BIOS:
Diagnostic LED Decoder
Check
G=Green, R=Red, A=Amber
point
MSB
E0 R
E9 A
EA A
EB A
LSB
R R OFF
R R OFF
R A OFF
R A G
Description
Initialize the floppy
controller in the super I/O.
Some interrupt vectors are
intialized. DMA controller
is initialized. 8259
interrupt controller is
initialized. L1 cache is
enabled.
Set up floppy controller
and data. Attempt to read
from floppy. Determine
information about root
directory of recovery
media.
Enable ATAPI hardware.
Attempt to read from
ARMD and ATAPI CD-
ROM. Determine
information about root
directory of recovery
media.
Disable ATAPI hardware.
Jump back to checkpoint
E9.
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