Specifications

SL 486VE User's Manual
4.7.1 Fatal Errors Through Beeps
These errors are conveyed through a number of beeps.
Beep Count
Meaning
1
DRAM Refresh Failure
2
Base 64 KB RAM Failure
4
System Timer Failure
5 Processor Failure
6
Keyboard Controller-GATE A20 Error
7
Virtual Mode Exception Error
9
ROM-BIOS Checksum Failure
4.7.2 Non- Fatal Errors Through Beeps
These errors are conveyed as one long beep followed by several short beeps.
Beep Count
Meaning
3 Conventional and Extended Memory Test Failure
8
Display Test and Vertical and Horizontal Retrace Test Failure
4.7.3 Fatal Errors Shown in Display
When these errors are displayed, the screen is cleared,and the error message
display is followed by a line saying SYSTEM HALTED.
1. CMOS INOPERATIONAL: indicates failure of CMOS shutdown
register test.
2. 8042 GATE-A20 ERROR: error in getting into protected mode.
3. INVALID SWITCH MEMORY FAILURE
4. DMA ERROR; DMA controller page register test failed.
5. DMA # 1 ERROR: DMA Unit 1 register test failed.
6. DMA # 2 ERROR: DMA Unit 2 register test failed.
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