Inputs:
Register
|
7
|
6
|
5
|
4
|
3
|
2
|
1
|
0
|
|||
Features
|
D8h
|
||||||||||
Sector
Count
|
na
|
||||||||||
LBA
Low
|
na
|
||||||||||
LBA
Mid
|
4Fh
|
||||||||||
LBA
High
|
C2h
|
||||||||||
Device
|
obs
|
na
|
obs
|
DEV
|
na
|
na
|
na
|
na
|
|||
Command
|
B0h
|
||||||||||
Device register -
DEV shall specify the selected device.
Normal
Outputs:
Register
|
7
|
6
|
5
|
4
|
3
|
2
|
1
|
0
|
|||
Error
|
na
|
||||||||||
Sector
Count
|
na
|
||||||||||
LBA
Low
|
na
|
||||||||||
LBA
Mid
|
na
|
||||||||||
LBA
High
|
na
|
||||||||||
Device
|
obs
|
na
|
obs
|
DEV
|
na
|
na
|
na
|
na
|
|||
Status
|
BSY
|
DRDY
|
DF
|
na
|
DRQ
|
na
|
na
|
ERR
|
|||
Device register –
DEV shall indicate the selected device.
Status register -
BSY shall be cleared to zero indicating command completion.
DRDY shall be set to one.
DF (Device Fault) shall be cleared to zero.
DRQ shall be cleared to zero.
ERR shall be cleared to zero.
Error
Outputs:
Register
|
7
|
6
|
5
|
4
|
3
|
2
|
1
|
0
|
|||
Error
|
na
|
na
|
na
|
na
|
na
|
ABRT
|
na
|
na
|
|||
Sector
Count
|
na
|
||||||||||
LBA
Low
|
na
|
||||||||||
LBA
Mid
|
na
|
||||||||||
LBA
High
|
na
|
||||||||||
Device
|
obs
|
na
|
obs
|
DEV
|
na
|
||||||
Status
|
BSY
|
DRDY
|
DF
|
na
|
DRQ
|
na
|
na
|
ERR
|
|||
Error register -
ABRT shall be set to one if this command is not supported or if the input
register values are invalid. ABRT may be set to one if the device is not able to
complete the action requested by the command.
Device register -
DEV shall indicate the selected device.
Status register -
BSY shall be cleared to zero indicating command completion.
DRDY shall be set to one.
DF (Device Fault) shall be cleared to zero.
DRQ shall be cleared to zero.
ERR shall be cleared to zero.
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