AT&T PC 6300 - Page 476

MAINTENANCE
5-98
STATUS
WORD
PROBABLE CAUSE MODULE
'7, 0080
Time Out
(Drive failed to respond!
1. MFD Unit
2. Motherboard
7r0040
Bad Seek
(Seek operation failed!
1. MFD Unit
2. Motherboard
•7,0020 Bad 765
(765 MFD Controller Chip failed!
1. MFD Unit
2. Motherboard
<7' 0010 Bad CRC
(Bad CRC on diskette read!
1. MFD Unit
2. Motherboard
'7,0009
DMA Boundary
(DMA attempted to cross 64-KB
boundary!
Motherboard
'7. 0008
Bad DMA
(DMA overrun on operation!
Motherboard
'.?()004 Record not found
(Requested sector not found!
1. Diskette
2. MFD Unit
'50003 Write Protect
(Write attempt on write-protect
diskette!
1. Diskette
2. MFD Unit
•7, 0002
Bad Addr Mark
(Address Mark not found!
1. Diskette
2. MFD Unit
'5 0001
Bad Cmd
(Bad command passed to
diskette I/O!
1. MFD Unit
2. Motherboard
Figure 5-33. MFD Unit Status Words
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0
n,
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