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ATA Bus Interface and ATA Commands
6-30 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
ERROR OUTPUTS
6.7.2
6.7.2
6.7.2
6.7.2
Read Sectors
Read Sectors
Read Sectors
Read Sectors
COMMAND CODE – 20h
DESCRIPTION – The READ 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 BSY and begins execution of the command.
INPUTS
ERROR OUTPUTS
Register
Register
Register
Register
7
77
7
6
66
6
5
55
5
4
44
4
3
33
3
2
22
2
1
11
1
0
00
0
Error
na
na
na
na
na
ABRT
TK0NF na
Sector Count
na
Sector Number
na
Cylinder Low
na
Cylinder High
Device/ Head
obs
na
obs
DEV
HEAD number or LBA
Status
BSY
DRDY
na
na
DRQ
na
na
ERR
Register
Register
Register
Register
7
77
7
6
66
6
5
55
5
4
44
4
3
33
3
2
22
2
1
11
1
0
00
0
Features
na
Sector Count
Sector count
Sector Number
Sector count or LBA
Cylinder Low
Cylinder low or LBA
Cylinder High
Cylinder high or LBA
Device/ Head
obs
LBA
obs
DEV
na
Head Number or LBA
Command
20h
Register
Register
Register
Register
7
77
7
6
66
6
5
55
5
4
44
4
3
33
3
2
22
2
1
11
1
0
00
0
Error
na
unc
na
IDNF
na
ABRT
na
na
Sector Count
na
Sector Number
na
Cylinder Low
na
Cylinder High
Device/ Head
obs
na
obs
DEV
HEAD number or LBA
Status
BSY
DRDY
DF
na
DRQ
na
na
ERR
Summary of Contents for FIREBALL PLUS AS 10.2
Page 12: ...About This Manual 1 4 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...
Page 16: ...General Description 2 8 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...
Page 61: ...Basic Principles of Operation Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT 5 16 ...
Page 62: ...Basic Principles of Operation 5 17 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...
Page 162: ...Index I 4 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...