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AMI BIOS 2.2x

Code

Meaning

00

Flag test

03

Register test

06

System hardware initialisation

09

BIOS ROM checksum

0C

Page register test

0F

8254 timer test

12

Memory refresh initialisation

15

8237 DMA controller test

18

8237 DMA initialisation

1B

8259 interrupt controller initialisation

1E

8259 interrupt controller test

21

Memory refresh test

24

Base 64K address test

27

Base 64K memory test

2A

8742 keyboard self test

2D

MC 146818 CMOS test

30

Start first protected mode test

33

Memory sizing test

36

First protected mode test

39

First protected mode test failed

3C

CPU speed calculation

3F

Read 8742 hardware switches

42

Initialise interrupt vector area

45

Verify CMOS configuration

48

Test and initialise video system

4B

Unexpected interrupt test

4E

Start second protected mode test

51

Verify LDT instruction

54

Verify TR instruction

57

Verify LSL instruction

5A

Verify LAR instruction

5D

Verify VERR instruction

60

Address line 20 test

63

Unexpected exception test

66

Start third protected mode test

69

Address line test

6C

System memory test

6F

Shadow memory test

72

Extended memory test

75

Verify memory configuration

78

Display configuration error messages

7B

Copy system BIOS to shadow memory

7E

8254 clock test

81

MC 146818 real time clock test

84

Keyboard test

87

Determine keyboard type

8A

Stuck key test

8D

Initialise hardware interrupt vector

90

Math coprocessor test

93

Determine COM ports available

96

Determine LPT ports available

99

Initialise BIOS data area

9C

Fixed/Floppy controller test

9F

Floppy disk test

A2

Fixed disk test

A5

External ROM scan

A8

System key lock test

AE

F1 error message test

AF

System boot initialisation

B1

Interrupt 19 boot loader

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