Gateway 9315 User Manual

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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 provides the diagnostic LED codes for these checkpoints and describes 
the type of checkpoints that may occur during the Bootblock recovery portion of the BIOS:
D6
R
O
G
R
Both key sequence and OEM-specific method is checked to 
determine if BIOS recovery is forced. Main BIOS checksum is 
tested. If BIOS recovery is necessary, control flows to checkpoint 
E0. See Bootblock Recovery Code Checkpoints section of 
document for more information.
D7
R
O
G
O
Restore  CPUID  value  back  into  register.  The  Bootblock-Runtime 
interface module is moved to system memory and control is given 
to it. Determine whether to execute serial flash.
D8
O
R
Off
R
The Runtime module is uncompressed into memory. CPUID 
information is stored in memory.
D9
O
R
Off
O
Store the Uncompressed pointer for future use in PMM. Copying 
Main BIOS into memory. Leaves all RAM below 1 MB 
Read-Write, including E000 and F000 shadow areas, but closing 
SMRAM.
DA
O
R
G
R
Restore CPUID value back into register. Give control to BIOS 
POST (ExecutePOSTKernel).
 for more information.
E1-E8
EC-EE
-
-
-
-
OEM  memory  detection/configuration  error.  This  range  is 
reserved for chipset vendors and system manufacturers. The 
error associated with this value may be different from one 
platform to the next.
Check 
point
Diagnostic LED decoder
G=Green, R=Red, O=Orange
Description
E0
R
R
R
Off
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
O
R
R
G
Set up floppy controller and data. Attempt to read from floppy.
EA
O
R
O
Off
Enable ATAPI hardware. Attempt to read from ARMD and ATAPI 
CDROM.
EB
O
R
O
G
Disable ATAPI hardware. Jump back to checkpoint E9.
Check 
point
Diagnostic LED decoder
G=Green, R=Red, O=Orange
Description