Compaq Mega-Post manual Error Code 7A, Error Code 7B, Error Code 7C, Error Code 7D, Error Code 7E

Appendix A

Chips & Tech (71)Key-lock.

AMI	Error Code - 72
	(72)Keyboard interface test over, mouse interface test started.
Compaq	(72)High order address test.
Chips & Tech (72)Pointing divide.
Phoenix	(72)Check for configuration errors.(Beep)=2-4-1-3.(72) Real time clock test.
	Error Code - 73
AMI	(73)Global data initialization for keyboard/mouse over.
Compaq	(73)Exit memory test.
ACER	Error Code - 74
	(74)About to test serial port.
AMI	(74)Display 'SETUP' prompt and about to start floppy setup.
Compaq	(74)Parity error on bus after memory test, system halted.
Phoenix	(74)Test real-time clock.(Beep)=2-4-2-1.Test for stuck keys.
AMI	Error Code - 75
	(75)Floppy setup over.
Compaq	(75)Start of protected mode test.
AMI	Error Code - 76
	(76)Hard disk setup about to start.
Compaq	(76)Prepare to enter protected mode.
Phoenix	(76)Check for keyboard errors. (Beep)=2-4-2-3.Initialize hardware interrupt
	vectors.
AMI	Error Code - 77
	(77)Hard disk setup over.
Compaq	(77)Test software exceptions.
	Error Code - 78

ACER

Compaq

Phoenix

AMI Compaq

AMI

Compaq

Phoenix

AMI Compaq

ACER

Compaq

Phoenix

AMI

Compaq

AMI

Compaq

Phoenix

AMI

Compaq

ACER

AMI

Compaq Phoenix

AMI

Compaq Phoenix

(78)Set real time.

(78)Prepare to return to real mode. (78)Detect and test CoProcessor.

Error Code - 79

(79)About to initialize timer data area. (79)Back in real mode-No error.

Error Code - 7A

(7A)Timer data initialized and about to verify CMOS battery power. (7A)Back in real mode-error.

(7A)Determine/Init COM channels.

Error Code - 7B

(7B)CMOS battery verification over. (7B)Exit protected mode.

Error Code - 7C

(7C)scan option. RAMs.

(7C)High order address test failure.

(7C)Set up hardware interrupts vectors.(Beep)=2-4-4-1.Determine LPT channels.

Error Code - 7D

(7D)About to analyze POST results. About to analyze diagnostic test results for memory.

(7D)Enter cache controller test.

Error Code - 7E

(7E)CMOS memory size updated. (7E)Exit cache controller test.

(7E)Test CoProcessor if present.(Beep)=2-4-4-3.Initialize BIOS data area.

Error Code - 7F

(7F)Look for <DEL>key and get into CMOS setup if found About to check optional ROM C000:0.

(7F)Copy System ROM to high RAM.

Error Code - 80

(80)Determine math CoProcessor is present.

(80)Keyboard test started, clearing output buffer, checking for stuck key, About to issue keyboard reset command. About to give control to optional ROM in segment C800 to DE00.

(80)Start of 8042 test.

(80)Disable onboard Super I/O ports and IRQs.(Beep)=3-1- 1-1.Detect floppy controller.

Error Code - 81

(81)Keyboard reset error/stuck key found. About to issue keyboard controller interface test command. Optional ROM control over.

(81)Do 8042 self-test.

(81)late POST device initialization.

Error Code - 82

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