Appendix Ii: Bios Post Code - TYAN Tiger K8W S2875 User Manual

Appendix II: BIOS POST Code

Code Beeps / Description
02h Verify Real Mode
03h Disable Non- Maskable Interrupt
(NMI)
04h Get CPU type
06h Initialize system hardware
08h Initialize chipset with initial
POST values
09h Set IN POST flag
0Ah Initialize CPU registers
0Bh Enable CPU cache
0Ch Initialize caches to initial POST
values
0Eh Initialize I/O component
0Fh Initialize the local bus IDE
10h Initialize Power Management
11h Load alternate registers with
initial POST values
12h Restore CPU control word
during warm boot
13h Initialize PCI Bus Mastering
devices
14h Initialize keyboard controller
16h 1-2-2-3. BIOS ROM checksum
17h Initialize cache before memory
autosize
18h 8254 timer initialization
Code
32h
33h
36h
38h
3Ah
3Ch
3Dh
42h
45h
46h
48h
49h
4Ah
4Bh
4Ch
4Eh
50h
51h
52h
69
http://www.TYAN.com
Beeps / Description
Test CPU bus-clock frequency
Initialize Phoenix Dispatch
Manager
Warm start shut down
Shadow system BIOS ROM
Autosize cache
Advanced configuration of
chipset registers
Load alternate registers with
CMOS values
Initialize interrupt vectors
POST device initialization
2-1-2-3. Check ROM copyright
notice
Check video configuration
against CMOS
Initialize PCI bus and devices
Initialize all video adapters in
system
QuietBoot start (optional)
Shadow video BIOS ROM
Display BIOS copyright notice
Display CPU type and speed
Initialize EISA board
Test keyboard