Gateway 9315 Bootblock recovery code checkpoints

Check	Diagnostic LED decoder				Description
point	G=Green, R=Red, O=Orange
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).See “POST code checkpoints” on
					page 111 for more information.
E1-E8	-	-	-	-	OEM memory detection/configuration error. This range is

EC-EE	reserved for chipset vendors and system manufacturers. The
	error associated with this value may be different from one
	platform to the next.

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:

Check	Diagnostic LED decoder				Description
point	G=Green, R=Red, O=Orange
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.

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