Compaq Mega-Post manual 50Protected mode

	Appendix A
	memory size for relocation /shadow. DMA page register test complete.
AST	(50)Protected mode.
Award	(50)Write all the CMOS values currently in the BIOS stack areas back into the
	CMOS. Write CMOS; Write all CMOS values back to RAM and clear screen.
Compaq	(50)Check for dual freq in CMOS.
Chips & Tech (50)Hardware initialize.
Phoenix	(50)Display CPU type and speed.(Beep)=2-2-1-1.(50)Per- form LSL instruction
	test.[Beep]=none Custom chip set or custom platform.
AMI	Error Code - 51
	(51)Memory size display adjusted due to relocation/shadow. Memory test above 1M
	to follow. DMA unit-1 base register test about to start.
AST	(51)Protected mode.
Award	(51)Pre-boot enable; Enable parity checker; Enable NMI, Enable cache before boot. (51)Check
Compaq	CMOS VDU configuration.
Chips & Tech (51)Timer Initialize
Phoenix	(51)Initialize EISA board.
	Error Code - 52
AMI	(52)Memory testing/initialization below 1M complete. Going to save memory size
	information. Going to prepare to go back to real mode. DMA unit-1 channel OK,
Award	about to begin CH-2.
	(52)Initialize all ISA ROMs. Later PCI initializations(PCI BIOS only).PnP initializations(PnP
	BIOS only).Program shadow RAM according to setup settings. Program parity according to
	setup setting. Power Management initialization. Initialize option ROMs; initialize any option
	ROMs present from C8000h to
	EFFFFh.
Compaq	(52)Start VDU search.
Chips & Tech (52)DMA controller initialize.
Phoenix	(52)Test keyboard.(Beep)=2-2-1-3.(52)Perform LAR instruction test.
AMI	Error Code - 53
	(53)Memory size information is saved. CPU registers are saved. Going to enter in
	real mode. DMA CH-2 base register test OK.
Award	(53)If it is not a PnP BIOS, initialize serial & parallel ports. Initialize time value in
	BIOS data area. Initialize time value; Initialize time value in 40h BIOS data area. (53)Vector to
Compaq	VDU option ROMs.
Chips & Tech (53)Initialize interrupt controller.
	Error Code - 54
ACER	(54)#7 shutdown.
AMI	(54)Shutdown successful, CPU in real mode. Going to re- store registers saved
	during preparation for shutdown. About to check F/F latch for unit-1 and unit-2. (54)Initialize
Compaq	primary display adapter.
Chips & Tech (54)Chip-Set Initialize.
Phoenix	(54)Set key click if enabled.(Beep)=2-2-2-1.(54)Perform VERR instruction test.
	Error Code - 55
AMI	(55)Registers restored. Going to disable gate A20 address line. F/F latch for both
Award	units checked.
	(55)Check PCI video Card-or replace video card.
Compaq	(55)Initialize secondary display adapter.
Chips & Tech (55)EMS configuration Setup.
	Error Code - 56
AMI	(56)A20 address line disable successful. BIOS ROM data area about to be checked.
	DMA unit 1 and 2 programming over and about to initialize 8259 interrupt
Compaq	controller.
	(56)No display adapters installed.
Chips & Tech (56) Protected mode.
Phoenix	(56)Enable keyboard.(Beep)=2-2-2-3.Unexpected exception.
AMI	Error Code - 57
	(57)A20 address line disable successful. BIOS ROM data area check halfway. BIOS
	ROM data area check to be com- plete.8259 initialization over.
Compaq	(57)Init primary VDU mode.
Chips & Tech (57)Memory size.
	Error Code - 58
ACER	(58)#6 shutdown.
AMI	(58)Memory size adjusted for relocation/shadow. Going to clear Hit<DEL>
	message. BIOS ROM data area check over. Going to clear Hit<ESC> message.8259
Compaq	mask register check OK.
	(58)Start of VDU test (for each adapter).
Chips & Tech (58)Memory interleave configure.
Phoenix	(58)Test for unexpected interrupts.(Beep)=2-3-3-.(58) Perform A20 gate test.
	Error Code - 59
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