Compaq Mega-Post manual Error Code 0B, Error Code 0C, Error Code 0D, Error Code 0E, Error Code 0F

	Appendix A
Phoenix&Dell (0A)Initialize CPU registers. (Beep)=1-1-3-3. Perform BIOS checksum test. 1st
	64K RAM chip or data line failure multi-bit.
	Error Code - 0B
AMI	CMOS status register initialize done. Keyboard controller command byte is written.
	Going to issue Pin-23,24 block- ing/ unblocking command. Going to issue pin-23,24 blocking/
Award	nubolcking command. Refresh started. Parity status cleared
	(0B)Verify the RTC time is valid or not. Detect bad battery. Read CMOS data into
	BIOS stack area. Perform PnP initializations. Assign I/O & Memory for PCI devices (PCI

BIOS Only). Test CMOS RAM checksum; beep; also test extended storage of parameters in the motherboard chipset; if not warm-booting, display the

Test CMOS RAM check- sum message, if bad, or insert key pressed, load defaults if bad. Initialize video interface; Detect CPU clock; Read CMOS location 14b to

find out type of video in use; Detect and initialize video adapter. 8254 timer, channel 0 test.

Chips & Tech (0B)CPU protected mode.

Phoenix&Dell (0B)Enable CPU Cable-Check CPU Jumpers. [Beep]=1-3-4 1st 64K RAM

	odd/even logic failure.
	Error Code - 0C
AMI	(0C)KB controller I/B free. Going to issue the BAT command to keyboard
	controller. Pin-3,24 of keyboard controller is blocked/unblocked. NOP command of
	key- board controller to be issued next. NOP command of key- board controller to
Award	be issued next. System timer started. Refresh & system timer OK
	(0C)Initialization of the BIOS data area(40:00-40:FF). Initialize keyboard; Detect

type of keyboard controller (optional 8242 or 8248, with Nedadon XOR gate control); Set NUM_LOCK status. Reset keyboard test keyboard controller interface

to verify it returned AAH and responded to enable/disable commands, set keyboard buffer, enable keyboard and keyboard interrupts for normal use,beep,halt.8254

	timer, channel 1 test.
Chips & Tech (0C)DMA register failure.
Phoenix&Dell (0C)Initialize cache to initial POST value. Test DMA page registers. [Beep]=1-4-1
	1st 64K RAM address line failure.
	Error Code - 0D
AMI	(0D)BAT command to keyboard controller is issued. Going to verify the BAT command. NOP
	command processing is done. CMOS shutdown register test to be
	done next. CMOS shutdown register test to be done next. Refresh link toggling
	passed. Refresh link toggling passed.
AST	(0D)(Beeps)=13 short,8254 timer register.
Chips & Tech (0D) (Beeps)=14 short, Refresh failure.
Award	(0D)Program some of the chipset's value. Measure CPU speed for display. Video

initialization including MDA, CGA,EGA/VGA. Initialize video interface; Detect

	CPU clock; Read CMOS location 14b to find out type of video in use; Detect and initialize
	video adapter. OEM specific-Initialize motherboard special chipset as
	required by OEM; initialize cache controller early, when cache is separate from chipset.8254
	timer, channel 2 test.
Phoenix&Dell (0D)[Beep]=1-4-2 1st 64K RAM parity test in progress or failure.
	Error Code - 0E
AST	(0E)(Beeps)=14 short, ASIC registers.
AMI	(0E)Keyboard controller BAT result verified. Any initialization after KB controller
	BAT to be next. CMOS shutdown register R/W test passed. Going to calculate CMOS
	checksum, and update DIAG. Goint to calculate CMOS checksum,and
	update DIAG Byte. Refresh period ON/OFF 50% OK
Award	(0E)Initialize the APIC(Multi-Processor BIOS only). Test video RAM(If Monochrome display
	device found). Show startup screen message. Test video memory; Test video memory, write

	sign-on message to screen. Setup shadow RAM-Enable shadow according to setup. Test COMS
	Shutdown byte.
Chips & Tech (0E)(Beeps)=14 short, Keyboard controller failure.
Phoenix	(0E)Initialize I/O.(Beep)=1-1-4-3. Test 8254 timers.
	Error Code - 0F
AMI	(0F)initialization after KB controller BAT done. Keyboard command byte to be
	written next. CMOS checksum calculation is done, DIAG byte written. CMOS Init.
	To begin(If "INIT CMOS IN EVERY BOOT IS SET").CMOS initialization to begin(If "INIT
AST	CMOS IN EVERY BOOT IS SET").
	(0F)(Beeps)=15 short,CMOS RAM shutdown.
Award	(0F)DMA channel 0 Test. Test DMA controller 0; BIOS checksum test, keyboard

	detect and initialization. Test Extended CMOS.
Chips & Tech (0F)(Beeps)=15 short, Protected mode failure.
Phoenix	(0F)Initialize the local IDE
	Error Code - 10
AMI	(10)KB controller command byte is written. Going to issue pin-23,24
	blocking/unblocking command. CMOS initia- lization done(if any). CMOS status
	7