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Beep code Contents
Port 80h
Description
2-4-3 1Eh Bit 14 first 64K RAM failure.
2-4-4 1Fh Bit 15 first 64K RAM failure.
3-1-1 20h Slave DMA register failure.
3-1-2 21h Master DMA register failure.
3-1-3 22h Master interrupt mask register failure.
3-1-4 23h Slave interrupt mask register failure.
None 25h Interrupt vector loading in progress.
3-2-4 27h Keyboard controller test failure.
None 28h CMOS power failure and checks calculation in
progress.
None 29h CMOS configuration validation in progress.
3-3-4 2Bh Screen initialization failure.
3-4-1 2Ch Screen retrace test failure.
3-4-2 2Dh Search for video ROM in progress.
None 2Eh Screen running with video ROM.
None 30h Screen operable.
None 30h Screen running with video ROM.
None 31h Monochrome monitor operable.
None 32h Color monitor (40 column) operable.
None 33h Color monitor (80 column) operable.
Beep Codes
B-3