Write Sectors - Quantum FIREBALL PLUS AS 10.2 Product Manual

6.7.3 6.7.3 6.7.3 6.7.3

Write Sectors

Write Sectors Write Sectors Write Sectors
COMMAND CODE – 30h
DESCRIPTION – The WRITE sectors command reads from 1 to 256 sectors,
beginning at the specified sector. As specified in the command block register, a
sector count equal to 0 requests 256 sectors. When the drive accepts this command,
it sets DRQ and waits for the host to fill the sector buffer with data to be written to
the drive. The drive does not generate an interrupt to start the first buffer-fill
operation. Once the buffer is full, the drive clears DRQ, sets BSY, and begins
execution of the command.
INPUTS
Register Register Register Register
Features
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/ Head
Command
ERROR OUTPUTS
Register Register Register Register
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/ Head
Status
7 7 7 7 6 6 6 6 5 5 5 5
na
Sector count
Sector count or LBA
Cylinder low or LBA
Cylinder high or LBA
obs LBA obs
30h
7 7 7 7 6 6 6 6 5 5 5 5
na unc na
na
na
na
obs na obs
BSY DRDY DF
Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
ATA Bus Interface and ATA Commands
4 4 4 4 3 3 3 3 2 2 2 2
DEV na Head Number or LBA
4 4 4 4 3 3 3 3 2 2 2 2
IDNF na ABRT
DEV HEAD number or LBA
na DRQ na
1 1 1 1 0 0 0 0
1 1 1 1 0 0 0 0
na na
na ERR
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