82091AA Datasheet, PDF (135/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
Table 24 FDC Command Set (Continued)
Data Bus
Phase R W
D7 D6 D5 D4
D3 D2 D1 D0
Remarks
Scan Low or Equal
Command W
W
W
W
W
W
W
W
W
Execution
MT MFM SK
0
0
0
1
1
0
0
1 Command Codes
0
0 HDS DS1 DS0
C
Sector ID
H
Information Prior
R
to Command
N
Execution
EOT
GPL
STP
Data Compared
Between the FDD
and Main-System
Result
R
R
R
R
R
R
R
ST 0
ST 1
ST 2
C
H
R
N
Status Information
After Command
Execution
Sector ID
Information After
Command
Execution
Scan High or Equal
Command W
W
W
W
W
W
W
W
W
Execution
MT MFM SK
0
0
0
1
1
1
0
1 Command Codes
0
0 HDS DS1 DS0
C
Sector ID
H
Information Prior
R
to Command
N
Execution
EOT
GPL
STP
Data Compared
Between the FDD
and Main-System
Result
R
R
R
R
R
R
R
ST 0
ST 1
ST 2
C
H
R
N
Status Information
After Command
Execution
Sector ID
Information After
Command
Execution
Recalibrate
Command W 0
0
0
0
W0
0
0
0
0
1
1
1 Command Codes
0
0 DS0 DS1 Enhanced
Controller
Execution
Head Retracted to
Track 0 Interrupt
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