82091AA Datasheet, PDF (150/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
The WRITE DATA Command operates in much the
same manner as the READ DATA Command The
following items are the same Please refer to the
READ DATA Command for details
 Transfer Capacity
 EN (End of Cylinder) bit
 ND (No Data) bit
 Head Load Unload Time Interval
 ID information when the host terminates the com-
mand
 Definition of DTL when N^e0 and when N does
not^e0
8 5 2 5 Verify
The VERIFY Command is used to verify the data
stored on a disk This command acts exactly like a
READ DATA Command except that no data is trans-
ferred to the host Data is read from the disk and
CRC is computed and checked against the previous-
ly stored value
Because no data is transferred to the host the TC
signal cannot be used to terminate this command
By setting the EC bit to 1 an implicit TC will be is-
sued to the FDC This implicit TC occurs when the
SC value has decrement to 0 (a SC value of 0 veri-
fies 256 sectors) This command can also be termi-
nated by setting the EC bit to 0 and the EOT value
equal to the final sector to be checked When
EC^e0 DTL SC should be programmed to 0FFh
Refer to Table 29 and Table 30 for information con-
cerning the values of MT and EC versus SC and
EOT value
Definitions
Sectors Per Side
e _{Number of formatted}
sectors per each side of
the disk
Sectors Remaining
e _{Number of formatted}
sectors left that can be
read including side 1 of
the disk when MT^e1
Table 30 Verify Command Result Phase
MT
EC
SC EOT Value
Termination Result
0
0
SC^eDTL
Successful Termination
EOT ^s Sectors Per Side
Result Phase Valid
0
0
SC^eDTL
Unsuccessful Termination
EOT ^l Sectors Per Side
Result Phase Invalid
0
1
SC ^s Sectors Remaining
Successful Termination
AND
Result Phase Valid
EOT ^s Sectors Per Side
0
1
SC ^l Sectors Remaining
Unsuccessful Termination
OR
Result Phase Invalid
EOT ^l Sectors Per Side
1
0
SC^eDTL
Successful Termination
EOT ^s Sectors Per Side
Result Phase Valid
1
0
SC^eDTL
Unsuccessful Termination
EOT ^l Sectors Per Side
Result Phase Invalid
1
1
SC ^s Sectors Remaining
Successful Termination
AND
Result Phase Valid
EOT ^s Sectors Per Side
1
1
SC ^l Sectors Remaining
Unsuccessful Termination
OR
Result Phase Invalid
EOT ^l Sectors Per Side
NOTE
When MTe1 and the SC value is greater than the number of remaining formatted sectors on Side 0 verification continues
on Side 1 of the disk
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