4 Summary of the HP/Phoenix BIOS HP/Phoenix BIOS (BIOS version: GX.07.xx)
Internal Cache | Tests the processor’s internal | ||||||||||
Memory Test | error code to display and the boot process to abort. |
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| Video Tests |
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| Initializes the video subsystem, tests the video shadow RAM, and, if | ||||||||||
Initialize the Video | required, shadows the video BIOS. A failure causes an error code to | ||||||||||
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| System Board Tests |
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Test External Cache | Tests the | ||||||||||
disables the external cache. |
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| Tests for the presence of HP SCSI ROMs. If SCSI ROMs are detected, their | ||||||||||
Shadow SCSI ROM | contents are copied into the shadow RAM area. A failure will cause an | ||||||||||
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8042 | Downloads the 8042 and invokes the 8042 internal | ||||||||||
causes an error code to display. |
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Timer 0/Timer 2 Test | Tests Timer 0 and Timer 2. Test failure causes an error code to display. | ||||||||||
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DMA Subsystem Test | Checks the DMA controller registers. Test failure causes an error code to | ||||||||||
display. |
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| Tests the Interrupt masks, the master controller interrupt path (by forcing | ||||||||||
Interrupt Controller Test | an IRQ0), and the | ||||||||||
| Test failure causes an error code to display. |
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Checks the | |||||||||||
the clock is running. Test failure causes an error code to display. | |||||||||||
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| Memory Tests |
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RAM Address Line | Verifies the address independence of | ||||||||||
Independence Test | stuck together). Test failure causes an error code to display. | ||||||||||
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| Sizes and clears the protected mode (extended) memory and writes the | ||||||||||
Size Extended Memory | value into CMOS bytes 30h and 31h. If the system fails to switch to | ||||||||||
| protected mode, an error code is displayed. |
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| Read/write test on | ||||||||||
using |
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| and | ). The test checks each block of | |||||
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(First 640KB) | system RAM to determine how much is present. Test failure of a 64 KB | ||||||||||
| block of memory causes an error code to display, and the test is aborted. | ||||||||||
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| Tests shadow RAM in | ||||||||||
Shadow RAM Test | A000h, B000h, and F000h). If they are not being used, segments C000h, | ||||||||||
| D000h and E000h are tested. Test failure causes an error code to display. | ||||||||||
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Protected Mode RAM Test | Tests protected RAM in 64 KB segments above 1 MB. (This test is not | ||||||||||
done during a reset using |
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(Extended RAM) |
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causes an error code to display. |
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| Keyboard / Mouse Tests |
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| Invokes a | ||||||||||
Keyboard Test | tests for the presence of a keyboard and for stuck keyboard keys. Test | ||||||||||
| failure causes an error code to display. |
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