Chassis Plans ATXP-875P, Техническое описание

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ATXP-875P Technical Reference Appendix B: Flash BIOS
Chassis Plans 65
Table B-2 Bootblock Recovery Code Checkpoints
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:
Checkpoint
Code
Description
E0 Initialize the floppy controller in the super I/O. Some
interrupt vectors are initialized. DMA controller is
initialized. 8259 interrupt controller is initialized. L1
cache is enabled.
E9 Set up floppy controller and data. Attempt to read from
floppy.
EA Enable ATAPI hardware. Attempt to read from ARMD
and ATAPI CDROM.
EB Disable ATAPI hardware. Jump back to checkpoint E9.
EF Read error occurred on media. Jump back to checkpoint
EB.
F0 Search for pre-defined recovery file name in root
directory.
F1 Recovery file not found.
F2 Start reading FAT table and analyze FAT to find the
clusters occupied by the recovery file.
E0 Initialize the floppy controller in the super I/O. Some
interrupt vectors are initialized. DMA controller is
initialized. 8259 interrupt controller is initialized. L1
cache is enabled.
E9 Set up floppy controller and data. Attempt to read from
floppy.
EA Enable ATAPI hardware. Attempt to read from ARMD
and ATAPI CDROM.
EB Disable ATAPI hardware. Jump back to checkpoint E9.
EF Read error occurred on media. Jump back to checkpoint
EB.
F0 Search for pre-defined recovery file name in root
directory.
F1 Recovery file not found.
F2 Start reading FAT table and analyze FAT to find the
clusters occupied by the recovery file.