User`s manual

5-3 System BIOS Error Messages
ROM BIOS Checksum Error
— Indicates an invalid ROM BIOS failure.
8254 Error
— Indicates a 8254 timer controller failure.
8237 Error
— Indicates a 8237 DMA controller failure.
74612 Error
— Indicates a 74612 page register failure.
8259 Error
— Indicates a 8259 interrupt controller failure.
8742 Error
— Indicates a 8742 controller failure.
Check Battery
— Indicates a system backup battery disconnection or
power loss.
RTC Checksum Error
— Indicates that the system memory refresh function does
not work.
Refresh lndicator Error
— Indicates that the system memory refresh does not work.
Base 64K Memory Error
— Indicates that the system’s first 64K memory does not
work.
FDC Error User Check
— Indicates that the floppy diskette controller does not work.
FDD Seek Failure
— Indicates a failure of the floppy diskette drive ‘seek
operation.
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Chapter 5: Troubleshooting