Quadtel AT Compatible BIOS

02 Flag TestSystem

04 Register Test  

06 System Hardware Initialization

08 Initialize Chip Set Registers 

0A BIOS ROM Checksum   

0C DMA Page Regigister Test 

0E 8254 Timer Test

10 8254 Timer Initialization

12 8237 DMA Controller Test 

14 8237 DMA InitializationInitialize 

16 8259/Reset Coprocessor   

18 8259 Interrupt Controller Test

1A Memory Refresh Test 

1C Base 64KB Address Test   

1E Base 64KB Memory Test    

20 Base 64KB Test (Upper 16 bits)

22 8742 Keyboard Self Test  

24 MC146818 CMOS Test  

26 Start First Protected Mode Test   

28 Memory Sizing Test  

2A Autosize Memory Chips    

2C Chip Interleave Enable Test   

2E First Protected Mode Test Exit

30 Unexpected Shutdown 

32 System Board Memory Size 

34 Relocate Shadow Ram if Configured

36 Configure EMS System

38 Configure Wait States

3A ReTest 64K Base RAM

3C CPU Speed Calculation

3E Get Switches From 8042

40 Configure CPU Speed

42 Initialize Interrupt Vectors

44 Verify Video Configuration

46 Initialize Video System

48 Test Unexpected Interrupts

4A Start Second Protected Mode Test

4C Verify LDT Instruction

4E Verify TR Instruction

50 Verify LSL Instruction

52 Verify LAR Instruction

54 Verify VERR Instruction

56 Unexpected Exception

58 Address Line 20 Test

5A Keyboard Ready Test

5C Determine AT or XT Keyboard

5E Start Third Protected Mode Test

60 Base Memory Test

62 Base Memory Address

64 Shadow Memory Test

66 Extended Memory Test

68 Extended Address Test

6A Determine Memory Size

6C Display Error Messages

6E Copy BIOS to Shadow Memory

70 8254 Clock Test

72 MC146818 Real Time Clock Test

74 Keyboard Stuck Key Test

76 Initialize Hardware Interrupt Vect.

78 Math Coprocessor Test

7A Determine COM Ports Available

7C Determine LPT Ports Available

7E Initialize BIOS Data Area

80 Determine Floppy/Fixed Controller

82 Floppy Disk Test

84 Fixed Disk Test

86 External ROM Scan

88 System Key Lock Test

8A Wait for F1 Key Pressed

8C Final System Initialization

8E Interrupt 19 Boot Loader

B0 Unexpected Interrupt

 

3 short beepsIndicates any Failure in Early Power On Self Test