Fujitsu MPD3XXXAH User Manual download pdf (Page 107)

C141-E072-01EN5 - 40

The READ LONG command supports only single sector operation.

At command issuance (I/O registers setting contents)

1F7

H

(CM) 0 0 1 0 0 0 1 R

1F6

H

(DH)

×

L

×

DV Head No. /LBA [MSB]

1F5

H

(CH)

1F4

H

(CL)

1F3

H

(SN)

1F2

H

(SC)

1F1

H

(FR)

Cylinder No. [MSB] / LBA

Cylinder No. [LSB] / LBA

Sector No. / LBA [LSB]

Number of sectors to be transferred

xx

R = 0 or 1

At command completion (I/O registers contents to be read)

1F7

H

(ST) Status information

1F6

H

(DH)

×

L

×

DV Head No. /LBA [MSB]

1F5

H

(CH)

1F4

H

(CL)

1F3

H

(SN)

1F2

H

(SC)

1F1

H

(ER)

Cylinder No. [MSB] / LBA

Cylinder No. [LSB] / LBA

Sector No. / LBA [LSB]

00 (*1)

Error information

*1 If the command is terminated due to an error, this register indicates 01.

(19) WRITE LONG (X'32' or X'33')

This command operates similarly to the READ SECTOR(S) command except that the device

writes the data and the ECC bytes transferred from the host system to the disk medium. The

device does not generate ECC bytes by itself. The WRITE LONG command supports only

single sector operation.

This command is operated under the following conditions:

• The command is issued in a sequence of the READ LONG or WRITE LONG (to the same

address) command issuance. (WRITE LONG command can be continuously issued after

the READ LONG command.)

If above condition is not satisfied, the command operation is not guaranteed.

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