Tyan Computer S2877 warranty Bios Post Code, Code Beeps / Description

4.3 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
1Ah		8237 DMA controller
		initialization
1Ch	Reset Programmable
		Interrupt Controller
20h		1-3-1-1	. Test DRAM refresh
22h		1-3-1-3	. Test 8742 KBD
		Controller
24h	Set ES segment register to
		4 GB
26h		Enable A20 line
28h		Autosize DRAM
29h		Initialize POST Memory
		Manager
2Ah		Clear 512 KB base RAM
2Ch		1-3-4-1	. RAM failure on
		address

Code		Beeps / Description
32h		Test CPU bus-clock
		frequency
33h		Initialize Phoenix Dispatch
		Manager
36h		Warm start shut down
38h		Shadow system BIOS ROM
3Ah		Autosize cache
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 UserPatch1
66h		Configure advanced cache
		registers

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