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Award BIOS v3.00 - 3.03 8/26/87

Code

Meaning

01

Processor test part 1; Processor status verification. Tests following CPU status flags: set/clear carry zero sign and overflow (fatal). Output: infinite loop if failed; continue test if OK. Registers: AX/BP.

02

Determine type of POST test. Manufacturing (e.g. 01-05 in loop) or normal (boot when POST finished). Fails if keyboard interface buffer filled with data. Output: infinite loop if failed; continue test if OK. Registers: AX/BX/BP.

03

Clear 8042 keyboard interface. Send verify TEST_KBRD command (AAh). Output: infinite loop if failed; continue test if OK. Registers: AX/BX/BP.

04

Reset 8042 keyboard controller. Verify AAh return from 03. Infinite loop if test fails. Registers: AX/BX/BP.

05

Get 8042 keyboard controller manufacturing status. Read input port via keyboard controller to determine manufacturing or normal mode operation. Reset system if manufacturing status from 02. Output: infinite loop if failed; continue test if OK. Registers: AX/BX/BP.

06

Init chips on board LSI chips. Disable colour/mono video; parity and DMA (8237A). Reset coprocessor; initialise (8254) timer 1; clear DMA page registers and CMOS shutdown byte.

07

Processor test #2. read/write verify SS/SP/BP registers with FFh and 00h data pattern.

08

Initialize CMOS chip

09

EPROM checksum for 32 Kbytes

0A

Initialize video interface

0B

Test 8254 channel 0

0C

Test 8254 channel 1

0D

Test 8254 channel 2

0E

Test CMOS date and timer

0F

Test CMOS shutdown byte

10

Test DMA channel 0

11

Test DMA channel 1

12

Test DMA page registers

13

Test 8741 keyboard controller

14

Test memory refresh toggle circuits

15

Test 1st 64k bytes of system memory

16

Setup interrupt vector table

17

Setup video I/O operations

18

Test video memory

19

Test 8259 channel 1 mask bits

1A

Test 8259 channel 2 mask bits

1B

Test CMOS battery level

1C

Test CMOS checksum

1D

Setup configuration byte from CMOS

1E

Sizing system memory & compare w/CMOS

1F

Test found system memory

20

Test stuck 8259'S interrupt bits

21

Test stuck NMI (parity/IO chk) bits

22

Test 8259 interrupt functionality

23

Test protected mode and A20 gate

24

Sizing extended memory above 1MB

25

Test found system/extended memory

26

Test exceptions in protected mode

27

Reserved

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