Dell Latitude CP Service Manual - Page 28

Slave DMA register - latitude cpi bios

Page 28 highlights

1-1-3 1-1-4 1-2-1 1-2-2 1-2-3 1-3-1 through 1-1-1 3-1-1 3-1-2 3-1-3 3-1-4 3-2-4 3-3-4 3-4-1 3-4-2 4-2-1 4-2-2 4-2-3 4-2-4 NVRAM write/read failure ROM BIOS checksum failure Programmable interval timer failure DMA initialization failure DMA page register write/read failure Installed memory module(s) not being properly identified or used Slave DMA register failure BIOS corrupted; system board faulty BIOS corrupted; system board faulty System board faulty System board faulty System board faulty Memory module improperly seated or system memory controller faulty (system board faulty) System board faulty Master DMA register failure Master interrupt mask register failure System board faulty Slave interrupt mask register failure Keyboard controller test failure Display memory test failure Keyboard assembly faulty or system board faulty System board faulty Display initialization failure Display retrace test failure No timer tick System board faulty Shutdown failure Gate A20 failure Unexpected interrupt in protected mode 3-2 Dell Latitude CP and CPi Service Manual

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3-2
Dell Latitude CP and CPi Service Manual
1-1-3
NVRAM write/read
failure
BIOS corrupted; system board
faulty
1-1-4
ROM BIOS checksum
failure
BIOS corrupted; system board
faulty
1-2-1
Programmable interval
timer failure
System board faulty
1-2-2
DMA initialization
failure
System board faulty
1-2-3
DMA page register
write/read failure
System board faulty
1-3-1
through
1-1-1
Installed memory
module(s) not being
properly identified or
used
Memory module improperly seated
or system memory controller faulty
(system board faulty)
3-1-1
3-1-2
Slave DMA register
failure
Master DMA register
failure
System board faulty
3-1-3
3-1-4
Master interrupt mask
register failure
Slave interrupt mask
register failure
System board faulty
3-2-4
Keyboard controller test
failure
Keyboard assembly faulty or system
board faulty
3-3-4
3-4-1
3-4-2
Display memory test
failure
Display initialization
failure
Display retrace test
failure
System board faulty
4-2-1
4-2-2
4-2-3
4-2-4
No timer tick
Shutdown failure
Gate A20 failure
Unexpected interrupt in
protected mode
System board faulty