Fujitsu MHA2021AT Product Manual page 79

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Interface
Command block registers contain the cylinder, the head, and the sector addresses
of the sector (in the CHS mode) or the logical block address (in the LBA mode)
where the error occurred, and remaining number of sectors of which data was not
transferred.
1F7
1F6
1F5
1F4
1F3
1F2
1F1
R = 0
R = 1
1F7
1F6
1F5
1F4
1F3
1F2
1F1
*1
If the command is terminated due to an error, the remaining number of
sectors of which data was not transferred is set in this register.
(2) READ MULTIPLE (X'C4')
This command operates similarly to the READ SECTOR(S) command. The
device does not generate an interrupt (assertion of the INTRQ signal) on each
every sector. An interrupt is generateed after the transfer of a block of sectors for
which the number is specified by the SET MULTIPLE MODE command.
5-18
At command issuance (I/O registers setting contents)
(CM)
0
0
H
(DH)
L
H
(CH)
Start cylinder No. [MSB] / LBA
H
(CL)
Start cylinder No. [LSB] / LBA
H
(SN)
Start sector No. / LBA [LSB]
H
(SC)
Transfer sector count
H
(FR)
xx
H
with Retry
without Retry
At command completion (I/O registers contents to be read)
(ST)
Status information
H
(DH)
L
H
(CH)
End cylinder No. [MSB] / LBA
H
(CL)
End cylinder No. [LSB] / LBA
H
End sector No. / LBA [LSB]
(SN)
H
(SC)
00 (*1)
H
Error information
(ER)
H
1
0
0
0
DV
Start head No. /LBA
[MSB]
DV
End head No. /LBA
[MSB]
0
R
C141-E042-01EN

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