FIC A360 service manual Troubleshooting and Repair, 3 b BIOS Beep Codes

Troubleshooting and Repair

Table 6-3 (b) BIOS Beep Codes

Beep	Diagnostic	Description	Test Performed
Code	Code
2-1-1	10h-1Fh	First 64K RAM chip or data	The first 64K of RAM is tested with a
2-1-2		line failure on bit x	rolling ones test and a pattern test. If any
			of the rolling ones tests fail, then the
2-1-3
			BIOS reports the specific bit that failed.
2-1-4			To determine the bit number from the
2-2-1			diagnostic code, subtract 10h. For
			example, if 12h is displayed at the
2-2-2
			diagnostic port, bit 2 failed. Failure
2-2-3			results in a system halt.
2-2-4
2-3-1
2-3-2
2-3-3
2-3-4
2-4-1
2-4-2
2-4-3
2-4-4
3-3-1	20h	Slave DMA register test in	Pattern test of channels 1 through 3 of
		progress or failure.	the slave controller (starting port address
			= 02h). Failure results in a system halt.
3-1-2	21h	Master DMA register test in	Pattern test of channels 1 through 3 of
		progress or failure.	the master DMA controller (starting port
			address = C4h). Failure results in a
			system halt.
3-1-3	22h	Master interrupt mask register	Rolling ones and zeros tests of the mask
		test in progress or failure.	register of the master programmable
			interrupt controller (port 21h). Failure
			results in a system halt.
3-1-4	23h	Slave interrupt mask register	Rolling ones and zeros tests of the mask
		test in progress or failure.	register of the master programmable
			interrupt controller (port A1h). Failure
			results in a system halt.
none	25h	Interrupt vector loading in	No specific test is performed - just
		progress.	indicates that the Interrupt Vector table is
			being initialized.
3-2-4	27h	Keyboard controller test in	The self-test command (AAh) is issued to
		progress or failure.	the 8042 (keyboard controller) and the
			results are monitored. Failure results in a
			system halt.
None	28h	CMOS RAM power failure	The power-fail bit in CMOS RAM is
		and checksum calculation	tested and the lower CMOS RAM area is
		test in progress.	being checksummed. A failure does not
			result in system halt.
None	29h	CMOS RAM configuration	No specific test is performed - just
		validation for video in	indicates that the configuration specified
		progress.	in CMOS for video is being matched
			against the actual installation. A failure
			does not result in a system halt.

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