Write Long (32H/33H); Figure 138. Write Long Command (32H/33H) - IBM IC35L020 - Deskstar 20 GB Hard Drive Specifications

15.38 Write Long (32h/33h)

Command Block Output
Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 138. Write Long Command (32h/33h)

The Write Long command transfers the data and the ECC bytes of the designated sector from the host to
the device. The data and the ECC bytes are then written to the disk media.
After 512 bytes of data have been transferred, the device will keep setting DRQ=1 to indicate that the
device is ready to receive the ECC bytes from the host. The data is transferred 16 bits at a time and the
ECC bytes are transferred 8 bits at a time. The number of ECC bytes is 4 or 40 depending upon the
setting of the Set Feature option. The default number after power-on is 4 bytes.
Output parameters to the device
Sector Count
Sector Number
Cylinder High/Low
H
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
0 0 0 0 0 0 0 1
V V V V V V V V
V V V V V V V V
V V V V V V V V
1 L 1 D H H H H
0 0 1 1 0 0 1 R
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
This parameter represents the number of continuous sectors to be transferred.
The Sector Count must be set to one.
This parameter represents the sector number of the sector to be transferred.
(L=0)
In LBA mode, this register contains LBA bits 0–7. (L=1)
This parameter represents the cylinder number of the sector to be transferred.
(L=0)
In LBA mode, this register contains LBA bits 8–15 (Low), 16–23 (High). (L=1)
This parameter represents the head number of the sector to be transferred.
(L=0)
In LBA mode, this register contains LBA bits 24–27. (L=1)
Deskstar 60 GXP Hard disk drive specification
Command Block Input
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V V
183
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - V
V V V V V V V V
V V V V V V V V
V V V V V V V V
- - - - H H H H
see below
4 3 2 1
DSC DRQ COR IDX
V – 0 –
0
ERR
V