AT&T PC 6300 - Page 224

DIAGNOSTICS
DIAGNOSTIC MESSAGE
MEANING
CPU(i8086) Fail
Faulty CPU
ROM Module Fail ROM failure
DMA Timer Fail
Timer Channel 1 failure
DMA Control Fail
Faulty DMA Controller
Interrupts Fail
Failure in software interrupts
Interrupt Fail HO
INT REQO from Timer Channel 0
not functioning
Interrupt Fail HI
INT REQl from Keyboard Controller
not functioning
Interrupt Fail H2
INT REQ2 from I/O Board not
functioning
Interrupt Fail H3 INT REQ3 from I/O Board
not functioning
Interrupt Fail H4
INT REQ4 from Serial Interface
npt functioning
Interrupt Fail H5
INT REQ5 from I/O Board not
functioning (or HDU Controller)
Interrupt Fail H6
INT REQ6 from Floppy Disk Unit
Controller not functioning
Interrupt Fail H7
INT REQ7 from Parallel port
not functioning
Figure 4-1. Resident Diagnostic Messages (Sheet 1 of 5)
4-16
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\.r
n
1 1
! 1
n.
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9
n
n
JI