Bootblock Initialization Code Checkpoints - Acer Altos G520-Serie Benutzerhandbuch

166
Diagnostic LED Decoder
Check
G=Green, R=Red, A+Amber
point
MSB
B1 R
00 OFF

Bootblock Initialization Code Checkpoints

The Bootblock initialization code sets up the chipset, memory and
other components before system memory is available. The following
table describes the type of checkpoints that may occur during the
bootblock initialization portion of the BIOS:
Diagnostic LED Decoder
Check
G=Green, R=Red, A+Amber
point
MSB
Before D1
D1 R
D0 R
Appendix F: Diagnostic Code Checkpoints
LSB
OFF R A
OFF OFF OFF
LSB
R OFF A
R OFF R
Description
Save system context for
ACPI.
Passes control to OS
Loader (typically INT19h).
Description
Early chipset initialization
is done. Early super I/O
initialization is done
including RTC and
keyboard controller. NMI
is disabled.
Perform keyboard
controller BAT test. Check
if waking up from power
management suspend
state. Save power-on
CPUID value in scratch
CMOS.
Go to flat mode with 4GB
and GA20 enabled. Verify
the bootblock checksum.