
Step 5
One Beep: DRAM refresh failure
Two Beeps: Parity Error/parity circuit failure
Three Beeps: Base 64K memory failure
Four Beeps: System timer not operational
Five Beeps: Processor failure
Six Beeps: 8042 keyboard controller/gate A20
Seven Beeps: Processor exception interrupt error/virtual mode execution error
Eight Beeps: Display Memory read/write error
Nine Beeps: ROM Bios checksum error
Ten Beeps: CMOS shutdown register read/write error
Eleven Beeps: Cache memory bad--do not enable cache
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FOR PHOENIX CODES
(1)One Long Beep, (2)One Short Beep, (3)One Long Beep, (4)One Short Beep;
1-1-3 CMOS write/ read failure
1-1-4 RAM bios checksum error
1-2-1 Programmable inteval timer failure
1-2-2 DMA initialization failure
1-2-3 DMA page register write/read failure
1-3-1 RAM refresh verification failure
1-3-3 First 64K RAM chip or data failure, multi bit
1-3-4 first 64k odd/even logic failure
1-4-1 address line failure 64k of RAM
1-4-2 Parity first 64k of RAM
1-4-3 Fail safe timer failure
1-4-4 Software NMI, port failure
3-1-1 Slave DMA register failure
3-1-2 Master DMA register failure
3-1-3 Master interrupt mask register failure
3-1-4 Slave interrupt mask register failure
3-2-4 Keyboard controller test failure
3-3-4 Screen initialization failure
3-4-1 Screen retrace test failure
3-4-2 Screen retrace test failure
4-2-1 Timer tick failure
4-2-2 Shutdown test failure
4-2-3 Gate A20 failure
4-2-4 Unexpected interrupt in protected mode
4-3-1 RAM test address failure
4-3-2 Programmable interval timer channel 2 test failure
4-3-4 tome of the day clock failure
4-3-3 Interval timer channel 2 failure
4-4-1 Serial port test failure
4-4-2 Parallel port test failure
4-4-3 Math coprocessor failure
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