HP KAYAK XU800 test, message, command, above 1 MB, locked key, and the NMI, the circular buffer, 6 Tests and Error Messages, the keyboard reset command

6 Tests and Error Messages

Order in Which POST Tests Are Performed

Checkpoint	POST Routine Description (Continued)
Code	(A Check Point Code is NOT an error code or error number)
50h	Memory below 1 MB has been tested and initialized. Adjusting the displayed memory size
	for relocation and shadowing.
51h	Memory size display was adjusted for relocation and shadowing. Testing the memory
	above 1 MB.
52h	Memory above 1 MB has been tested and initialized. Saving the memory size information.
53h	Memory size information and CPU registers are saved. Entering real mode.
54h	Shutdown was successful. The CPU is in real mode. Disabling the Gate A20 line, parity,
	and the NMI.
57h	The A20 address line, parity, and the NMI disabled. Adjusting the memory size depending
	on relocation and shadowing.
58h	Memory size was adjusted for relocation and shadowing. Clearing the Hit <DEL>
	message.
59h	The Hit <DEL> message is cleared. The <WAIT> message is displayed. Starting the
	DMA and Interrupt controller test.
60h	DMA page register test passed. Performing the DMA controller 1 base register test.
62h	DMA controller 1 base register test passed. Performing the DMA controller 2 base register
	test.
65h	DMA controller 2 base register test passed. Programming DMA controllers 1 and 2.
66h	Completed programming DMA controllers 1 and 2. Initializing the 8259 interrupt controller.
62h	Test extended memory address lines
7Fh	Extended NMI source enabling is in progress.
80h	Keyboard test has started. Clearing the output buffer and checking for stuck keys. Issuing
	the keyboard reset command.
81h	Keyboard reset error or stuck key was found. Issuing the keyboard controller interface test
	command.
82h	Keyboard controller interface test completed. Writing the command byte and initializing
	the circular buffer.
83h	Command byte was written and global data initialization has completed. Checking for a
	locked key.
84h	Locked key checking is over. Checking for memory size mismatch with CMOS RAM data.

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