Acer Altos G520 series User Manual page 172

162
Diagnostic LED Decoder
Check
G=Green, R=Red, A+Amber
point
MSB
05 OFF
06 OFF
08 G
CO R
C1 R
C2 R
C5 R
C6 R
C7 R
Appendix F: Diagnostic Code Checkpoints
LSB
G OFF G
G G OFF
OFF OFF OFF
R OFF OFF
R OFF G
R G OFF
A OFF G
A G OFF
A G G
Description
Initializes the interrupt
controlling hardware
(generally PIC) and
interrupt vector table.
Do R/W test to CH-2 count
reg. Initialize CH-0 as
system timer. Install the
POSTINT1Ch handler.
Enable IRQ-0 in PIC for
system timer interrupt.
Traps INT1Ch vector to
"POSTINT1ChHandlerBloc
k."
Initializes the CPU. The
BAT test is being done on
KBC. Program the
keyboard controller
command byte is being
done after Auto detection
of KB/MS using AMI KB-5.
Early CPU Init Start --
Disable Cache - Init Local
APIC
Set up boot strap
processor information
Set up boot strap
processor for POST
Enumerate and set up
application processors
Re-enable cache for boot
strap processor
Early CPU Init Exit