Acer 5220G User Manual
Page 123
Chapter 4
113
3Ch
Advanced configuration of chipset
registers
3Dh
Load alternate registers with CMOS
values
42h
Initialize interrupt vectors
45h
POST device initialization
46h
2-1-2-3
Check ROM copyright notice
48h
Check video configuration against CMOS
49h
Initialize PCI bus and devices
4Ah
Initialize all video adapters in system
4Bh
QuietBoot start (optional)
4Ch
Shadow video BIOS ROM
4Eh
Display BIOS copyright notice
50h
Display CPU type and speed
51h
Initialize EISA board
52h
Test keyboard
54h
Set key click if enabled
58h
2-2-3-1
Test for unexpected interrupts
59h
Initialize POST display service
5Ah
Display prompt “Press F2 to enter
SETUP”
5Bh
Disable CPU cache
5Ch
Test RAM between 512 and 640 KB
60h
Test extended memory
62h
Test extended memory address lines
64h
Jump to User Patch1
66h
Configure advanced cache registers
67h
Initialize Multi Processor APIC
68h
Enable external and CPU caches
69h
Setup System Management Mode (SMM)
area
6Ah
Display external L2 cache size
6Bh
Load custom defaults (optional)
6Ch
Display shadow-area message
6Eh
Display possible high address for UMB
recovery
70h
Display error messages
72h
Check for configuration errors
76h
Check for keyboard errors
7Ch
Set up hardware interrupt vectors
7Eh
Initialize coprocessor if present
80h
Disable onboard Super I/O ports and
IRQs
81h
Late POST device initialization
Code
Beeps
POST Routine Description