Acer Altos R510 Service Manual page 127

POST Code Checkponts
Checkpoint Diagnostic LED Decoder
G=Green, R=Red, A=Amber
MSB
03 OFF
04 OFF
05 OFF
06 OFF
08 G
C0 R
C1 R
C2 R
C5 R
C6 R
C7 R
0A G
0B G
0C G
0E G
13 OFF
24 OFF
30 OFF
Chapter 4
Table 17. POST Code Checkpoints
LSB
OFF G G
G OFF OFF
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
OFF G OFF
OFF G G
G OFF OFF
G G OFF
OFF G A
G R OFF
OFF R R
Disable NMI, parity, video for EGA, and DMA controllers. Initialize
BIOS, POST, Run-time data area. Initialize BIOS modules on
POST entry and GPNV area. Initialized CMOS as mentioned in the
Kernel Variable "wCMOSFlags."
Check CMOS diagnostic byte to determine if battery power is OK
and CMOS checksum is OK. Verify CMOS checksum manually by
reading storage area. If the CMOS checksum is bad, update CMOS
with power-on default values and clear passwords. Initialize status
register A.
Initializes data variables that are based on CMOS setup questions.
Initializes both the 8259 compatible PICs in the system
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 "POSTINT1ChHandlerBlock."
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
Initializes the 8042 compatible Key Board Controller.
Detects the presence of PS/2 mouse.
Detects the presence of Keyboard in KBC port.
Testing and initialization of different Input Devices. Also, update the
Kernel Variables.
Traps the INT09h vector, so that the POST INT09h handler gets
control for IRQ1. Uncompress all available language, BIOS logo,
and Silent logo modules.
Early POST initialization of chipset registers.
Uncompress and initialize any platform specific BIOS modules.
Initialize System Management Interrupt.
Description
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