HP 5000C/CT manual System halt

3-1-3	Master interrupt mask register test in progress or failure. Failure results in
	a system halt.
3-1-4	Slave interrupt mask register test in progress or failure. Failure results in
	a system halt.
3-2-4	Keyboard controller test in progress or failure. Failure results in a system
	halt.
3-3-4	Screen memory test in progress or failure. Failure will result in a beep
	code but not a system halt.
3-4-1	Video Retrace Failure.
3-4-2	Screen retrace test in progress.
3-4-3	Screen retrace test failure
4-2-1	Timer-tick interrupt test in progress or failure. An error message is
	displayed on the screen. The system does not halt.
4-2-2	Shutdown test in progress or failure. If possible, the BIOS will continue
	POST, skipping the memory tests.
4-2-3	Gate A20 failure. An error message is displayed on the screen and the
	memory tests are suspended. The system does not halt.
4-2-4	Unexpected interrupt in protected mode. The system does not half when
	an unexpected interrupt occurs.
4-3-1	RAM test of memory above 64K in progress or failure. POST will
	continue.
4-3-2	Programmable interval timer channel 2 test in progress or failure. POST
	will continue.
4-3-4	Real-time clock text in progress
4-4-1	Serial port test in progress or failure. POST will continue.
4-4-2	Parallel port test in progress or failure. POST will continue.
4-4-3	Math coprocessor test in progress or failure. POST will continue.

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