ix
S4 POST Codes
Code(hex) Name
Description
5A
Early Chipset Init
Early Initialized the super IO
Reset Video controller
Keyboard controller init
Test the Keyboard
Initilized the mouse
5B
Cmos Check
Check Cmos Circuitry and reset CMOS
5C Chipset
default
Prog
Program the chipset registers with
CMOS values. Init onboard clock
generator
5D
Identify the CPU
Check the CPU ID and init L1/L2 cache
5E Setup
Interrupt
Vector Table
Initialize first 120 interrupt
vectors with SPURIOUS_INT_HDLR and
INT 00h-1Fh according to INT_TBL
First step initialize if single CPU
Onboard. Re-init KB
If support HPM, HPM get initialized
Here.
5F Test
CMOS
Interface and
Battery status
Verifies CMOS is working correctly,
detects bad battery. If failed, load
CMOS defaults and load into chipset
60
KBC final Init
Final Initial KBC and setup BIOS data
area
61 Initialize
Video
Interface
Read CMOS location 14h to find out
type of video in use.
Detect and Initialize Video Adapter.
62
Video memory test
Test video memory, write sign-on
message to screen.
Setup shadow RAM - Enable shadow
according to Setup.
63
Setup PS2 mouse and
test DMA
Setup PS2 Mouse and reset KB
Test DMA channel 0
64
Test 8259
Test 8259 channel 1 and mask IRQ 9
65
Init Boot Device
Detect if mouse is present,
initialize mouse, install interrupt
vectors.
Special treatment to PS2 Mouse port
ACPI sub-system initializing
Initialize cache controller.
66 Install
Boot
Devices
Enter setup check and auto-
configuration check up
Initialize floppy disk drive
controller and any drives.
Install FDD and setup BIOS data area
Parameters Initialize hard drive
controller and any drives.
IDE device detection and install
67
Cache Init
Cache init and USB init
68
PM init
PM initialization
69
PM final Init and
issue SMI
Final init Before resume
FF Full
on
BootBlock POST Codes
Code(hex) Name
Description
1
Base memory test
Clear base memory area
(0000:0000--9000:ffffh)
