4.2 Phoenix 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

 

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

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

67h

 

Initialize Multi Processor APIC

 

 

68h

Enable external and CPU

 

 

caches

69h

Setup System Management

 

 

Mode (SMM) area

71

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Tyan Computer N3600T, S2937 warranty Phoenix Bios Post Code, Code Beeps / Description