Appendix Ii: Post Error Code For Bios - TYAN TOMCAT I7230A User Manual

Tomcat i7230A S5160

Appendix II: Post Error Code for BIOS

Code Beeps / Description
02h Verify Real Mode
03h Disable Non-Maskable Interrupt
(NMI)
04h Get CPU type
06h Initialize system hardware
08h Initialize
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
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
1Ah 8237
initialization
1Ch Reset Programmable Interrupt
Controller
20h 1-3-1-1. Test DRAM refresh
22h 1-3-1-3.
Controller
24h Set ES segment register to 4
GB
26h Enable A20 line
28h Autosize DRAM
29h Initialize
Manager
2Ah Clear 512 KB base RAM
2Ch 1-3-4-1.
address
2Eh 1-3-4-3. RAM failure on data
bits of low byte of memory bus
2Fh Enable cache before system
BIOS shadow
30h 1-4-1-1. RAM failure on data
bits of high byte of memory bus
chipset with initial
CPU control word
DMA controller
Test 8742 KBD
POST Memory
RAM failure on
http://www.tyan.com
Appendix II: Post Error Code for BIOS
Code Beeps / Description
32h Test CPU bus-clock frequency
33h Initialize
Manager
36h Warm start shut down
38h Shadow system BIOS ROM
3Ah Autosize cache
3Ch Advanced
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
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 UserPatch1
66h Configure
registers
67h Initialize Multi Processor APIC
68h Enable external
caches
69h Setup System
Mode (SMM) area
55
Phoenix Dispatch
configuration of
configuration
advanced cache
and CPU
Management