Acer G520 series Appendix F Diagnostic Code Checkpoints, Check point, Description, memory. CPUID

170 Appendix F: Diagnostic Code Checkpoints

Check point

Diagnostic LED Decoder

G=Green, R=Red, A+Amber

MSB LSB

Description

D7	R	A	G	A	Restore CPUID value back
					into register. The
					Bootblock-Runtime
					interface module is moved
					to system memory and
					control is given to it.
D8	A	R	OFF	R	The Runtime module is
					uncompressed into
					memory. CPUID
					information is stored in
					memory.
D9	A	R	OFF	A	Store the Uncompressed
					pointer for future use in
					PMM. Copying Main BIOS
					into memory. Leaves all
					RAM below 1MB Read-
					Write including E000 and
					F000 shadow areas but
					closing SMRAM.
DA	A	R	G	R	Restore CPUID value back
					into register. Give control
					to BIOS POST (Execute

POST Kernel). See POST Code Checkpoints section of document for more information.