Write Long (32H/33H); Figure 138. Write Long Command (32H/33H) - IBM IC25N040ATCS04 - Travelstar 40 GB Hard Drive Specifications

13.37 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 one sector from the
host to the device, then the data and the ECC bytes are 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 are either 4 or 40 according to
setting of the Set Feature option. The default number after power on is 4 bytes.
Output parameters to the device
Sector Count
Sector NumberThis indicates the sector number of the sector to be transferred. (L = 0)
Cylinder High/Low
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 indicates the number of continuous sectors to be transferred. The Sector
Count must be set to one.
In LBA mode this register contains the LBA bits 0–7. (L = 1)
This indicates the cylinder number of the sector to be transferred. (L = 0)
In LBA mode this register contains the LBA bits 8–15 (Low) and bits
16–23 (High). (L = 1)
Travelstar 60GH & 40GN hard disk drive specifications
Command Block Input Registers
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
187
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 0
DSC DRQ COR IDX ERR
V - 0 - V