4. IDE Interface
26
command is executed as soon as received from the host. Each command may need
additional programming of the sector count, sector number, cylinder, and/or drive/head
register(s). Command codes and parameters are shown in the following Table,
"Command Codes and Parameters".
See Chapter 5, "
IDE Command Descriptions
," for further details.
Command Codes and Parameters
COMMAND
PARAMETERS
NAME
CODE
SC
SN
CY
DH
EXECUTIVE DRIVE DIAGNOSTIC
FORMAT TRACK
IDENTIFY DRIVE
INITIALIZE DRIVE PARAMETERS
READ BUFFER
READ MULTIPLE
READ SECTORS, with retry
READ SECTORS, no retry
READ LONG, with retry
READ LONG, no retry
READ VERIFY SECTORS, with retry
READ VERIFY SECTORS, no retry3
RECALIBRATE
SEEK
SET MULTIPLE MODE
WRITE BUFFER
WRITE MULTIPLE
WRITE SECTORS, with retry
WRITE SECTORS, no retry
WRITE LONG, with retry
WRITE LONG, no retry
READ DEFECT LIST - Quantum
READ CONFIGURATION- Quantum
SET CONFIGURATION- Quantum
90h
50h
ECh
91h
E4h
C4h
20h
21h
22h
23h
40h
41h
1Xh
7Xh
C6h
E8h
C5h
30h
31h
32h
33h
F0h
F0h
F0h
D*
Y
Y
Y
D
Y
Y
D
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
D
Y
Y
D
Y
D
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Key: SC = Sector Count Register
SN = Sector Number Register
Y indicates that the register contains a valid parameter for this command; for the
Drive/Head Register, that the drive uses both the drive and head parameters.
D indicates that only the drive parameter is valid, not the head parameter.
D* indicates that the host addresses the parameter to Drive 0, but both drives
execute the command.
Where a parameter is blank, the command does not require the contents of the register.
CY = Cylinder Register
DH = Drive/Head Register
C
O
R
E
C
O
M
M
A
N
D
S
F
O
R
D
R
I
V
E
S
Q
U
A
N
T
U
M
S
P
E
C
I
F
I
C
SET BUFFER MODE-Conner
TRANSLATE COMMAND- Conner
POWER COMMANDS - Conner
PHYSICAL SEEK - Conner
DEFECT LIST - Conner
ENABLE INDEX - Conner
C
O
N
N
E
R
S
P
E
C
I
F
I
C
A
L
L
EFh
F1h
Exh
F2h
F5h
F6h
N
N
N
N
N
N
N
Y
Y
D
D
D
N
N
Y
Y
Y
N
D
D
N
N
N
N
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