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Olivetti PS/2 Compatible

Code

Meaning

01

Processor test

02

Shutdown

03

Interrupt controller initialisation

04

Refresh test

05

CMOS periodic interrupt test

06

Timer ratio

07

Test first 64k RAM

08

Test the KBC (8742)

09

NMI test

0A

8254 test

0B

Port 94h test

0C

Port 103h test

0D

Port 102h test

0E

Port 96h test

0F

Port 107h test

10

Blank the screen

11

KB/Aux device fuse check

12

CMOS battery test

13

CMOS RAM checksum test

14

Extended CMOS checksum 0-8K

15

System board and adapter initialisation

16

RAM test and initialisation

17

Protected mode register test

18

CMOS RAM shutdown byte test

19

80286 protected mode test

1A

Video option ROM scan

1B

EPROM checksum test

1C

Interrupt controller #1 test

1D

Interrupt controller #2 test

1E

Interrupt vector initialisation

1F

CMOS RAM test

20

Extended CMOS r/w test

21

CMOS clock test

22

Clock calendar test

23

Dummy checkpoint

24

Watchdog timer test

25

Test RAM from 64K to 640K

26

Configure memory 640K

27

Text expansion memory

28

Initialize extended BIOS data segment and log POST errors

29

Configure memory above 1 Mb

2A

Dummy checkpoint

2B

Test RAM parity

2C

Test DMA page registers

2D

Test DMA controller base/current address registers

2E

Test DMA transfer count register

2F

Initialize DMA controller

30

Test PIO 61

31

Test keyboard

32

Initialize keyboard typematic rate and delay

33

Test AUX device

34

Test advanced protected mode

35

Configure parallel ports

36

Configure 8250 serial ports

37

Configure coprocessor

38

Configure game card

39

Configure and initialize hard disk

3A

Floppy disk configuration

3B

lnitialize ROM drivers

3C

Display total memory and hard drives

3D

Final initialization, Checkpoints complete

3E

Detect and initialize parallel ports

3F

Initialize hard drive and controller

40

Detect and initialize math coprocessor

41

Reserved

42

Initiate adapter ROM scan

CC

Unexpected processor exception occurred

DD

Save DDNIL status

EE

NMI handler shutdown

FF

INT 19 boot

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