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Zenith Orion 4.1E - 1992
??????Checkpoints 00h-1Fh and F0h-FFh are displayed after the indicated function is completed.

Code

Meaning

02

Cold Boot, Enter Protected Mode

03

Do Machine Specific Initialization

F0

Start of Basic HW Initialization for Boot

F1

Clear CMOS Pre-Slush Status Location

F2

Starting CLIO Initialization

F3

Initialize SYSCFG Register

F4

DXPI Initialization for Boot Block

F5

Turning OFF Cache

F6

Configure CPU Socket Pins

F7

Checking for 387SX

F8

82C206 DEFAULT Initialization

F9

Superior Default Initialization

FF

End of Machine-specific Boot Block

04

Check Flash Checksum

05

Flash OK, jump into Flash (FFFD Flash Code

06

Reset or Power-Up

07

CLIO Default init command

08

SYSCFG REG initialised

09

CMOS Pre-slush error words initialisation

10

SCP initialised

11

DRAM autosizing complete

12

Parity check enabled. Enable Memory Parity (EMP) LED turned off

13

Start of slushware test

14

Slushware at 000F0000h OK

15

BIOS ROM copied to slushware

16

Back in Real Mode

17

ROM BIOS Slushing is finished. CPU LED Turned off

18

Video ROM (C0000 Slushware Test

19

Internal Video ROM Slushed

1A

Back in Real Mode

1B

Internal video hardware enabled.

1C

CPU clock frequency determined

1E

BIOS RAM cleared

20-EF are displayed before the indicated function has been attempted. 20-2A indicate restart after system shutdown, usually to return to real mode from protected mode. The CMOS RAM shutdown byte (0F) will contain a value indicating the reason for the shutdown.

Code

Meaning

20

RESET (CMOS 0)

21

Continue after Setting Memory Size (CMOS 0F=1)

22

Continue after Memory Test (CMOS 0F=2)

23

Continue after Memory Error (CMOS 0F=3)

24

Continue with Boot Loader Request (CMOS 0F=4)

25

Jump to execute User Code (flush) (CMOS 0F=5)

26

Continue after Protected Mode Test Passed (CMOS 0F=6)

27

Continue after Protected Mode Test Failed (CMOS 0F=7)

28

Continue after Extended Protected Mode Test (CMOS 0F=8)

29

Continue after Block Move (CMOS 0F=9)

2A

Jump to execute User Code (CMOS 0F=A)

2B

Reserved

2C

Reserved

2D

Reserved

2E

Reserved

2F

Reserved

30

Exit from Protected Mode

31

TEST-RESET passed (80386). Warm Boot

32

Check the ROM Checksum. ROM LED Turned Off

33

Clear the Video Screen On

34

Check System DRAM Config Update CMOS-TOTAL-MEM-SIZE Value

35

Pro-load CMOS if CMOS is

36

Turn Off the UMB RAM

37

Turn Parity Generation

38

Initialize System Variable

39

Check for errors in POWER

3A

Initialize SCP MODE

3B

Test CMOS Diag. Power Reset

3C

Test CPU Reset 80386 & Determine State Number

3D

Save CPU ID & Processor-T

3E

Init the Video & Timers

3F

Init DMA Ports, Clear Page

40

Set Speed too Fast for Now

41

Test EEPROM Checksum

42

Enable/Disable Superior's Parallel, FDC & HDC Per CMOS

43

Slush External Video BIOS if on CMOS

44

Turn Cache off for Memory

45

Test Extended RAM (1-16Mb)

46

Test BASE RAM (0-64 OK). RAM LED turned off by Base RAM Test

47

Determine Amount of System

48

Set WARM-BOOT Flag if RES Indicates Cold Boot

49

Clear 16K of Base RAM

4A

Install BIOS Interrupt Vector

4B

Test System Timer. INT LED turned off if CLOCK Test passes

4C

(Re)Initialize Interrupt

4D

Enable Default Hardware Initialization

4E

Determine Global I/O Configuration

4F

Initialize Video

50

Init WD90C30 Scratchpad

51

Check for Errors before Boot

52

Reserved

53

Test (Ext Only) and Initialize

54

Reserved

55

Initialize the Keyboard Processor

56

Initialize the PS/2 Mouse

57

Configure CLIO for Mouse

58

Configure CLIO for LAN

59

Configure CLIO for SCSI

5A

Configure CLIO for WAM

5B

Wait for User to Enter Code

5C

Init System Clock TOD, Enable

5D

Test, Init Floppy Drive Sensor. Disk LED Turned off

5E

Check for Z150 Style Disk

5F

Init Winchester Subsystem

60

Set Default I/O Device Parameters

61

Get LAN ID Info from LAN

62

*Install ROMs at 0C8000h

63

*Install ROMs at 0E000h

64

Initialize SCSI Interface

65

Run with A2O off in PC Mode

66

Really turn off the SCP

67

Set Machine Speed using CMOS

68

Turn on Cache

69

Calibrate 1ms Constants

6A

*Enable Non-Maskable Interpreter

6B

Reserved

6C

Clear the warm-boot flag

6D

Check for Errors before Boot

6E

Boot

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