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Copyright ©2000 Toshiba corporation. All rights reserved.
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10.8.11 Seek (7xh)
COMMAND CODE
0 1 1 1 X X X X
REGISTER
REGISTER SETTING
NORMAL COMPLETION
DR
drive no.
no change
CY
cylinder to seek
no change
HD
head to seek
no change
SN
no
change
SC
no
change
FT
no
change
LBA
address to seek
no change
This command moves the R/W heads to the cylinder specified in the task files. The drive sets BSY and
starts seek operation. After the completion of a seek operation, the drive asserts DSC
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, negates BSY ,
and return the interrupt.
If CY, HD and SN registers show invalid address, “ID Not Found” error is reported and no seek operation
shall be executed. All commands related to data access possess Implied Seek function and don't need this
command.
10.8.12 Toshiba Specific
COMMAND CODE
1 0 0 0 X X X X
1 0 0 1 1 0 1 0
1 1 1 1 0 0 0 0
1 1 1 1 0 1 1 1
1 1 1 1 1 0 1 X
1 1 1 1 1 1 X X
These commands are only for factory use. Host must not issue them.
10.8.13 Execute Diagnostics (90h)
COMMAND CODE
1 0 0 1 0 0 0 0
REGISTER
REGISTER SETTING
NORMAL COMPLETION
DR
OOH
CY
OOH
HD
OOH
SN
O1H
SC
O1H
FT
This command enables the drive to execute following self-test and reports the results to the error register
described in Table 10.7.2-1.
(1) ROM checksum test
(2) RAM test
(3) Controller LSI register test
An interrupt is generated at the completion of this command.
When two drives are daisy-chained on the interface, both drives execute the self test and the MASTER drive
reports valid error information of the two drives.
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ATA-2 Notes: Prior to ATA-2 standard, this bit indicated that the device was on track. This bit may be used for other purposes in
future standards. For compatibility the drive supports this bit as ATA-1 specifies. User is recommended not to use this bit.
