AT&T PC 6300 - Page 225

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DIAGNOSTICS
DIAGNOSTIC MESSAGE
MEANING
RT Clock Fail
MM58174 registers not furictioning
RT Clock FailrNR
8253 interrupt did not respond
RT Clock Fail:LO
8253 interrupt is out of specifi
cation on the low end
RT Clock FailtHI
8253 interrupt is out of specifi
cation on the high end
Figure 4-1. Resident Diagnostic Messages (Sheet 2 of 5)
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DIAGNOSTIC MESSAGE
MEANING
Floppy (A:) Not Ready
Diskette not present or
faulty MFD Unit A
Fixed Disk Not Present
Faulty HDD
Figure 4-1. Resident Diagnostic Messages (Sheet 3 of 5)
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