82077AA Datasheet, PDF (20/62 Pages) Intel Corporation – CHMOS SINGLE-CHIP FLOPPY DISK CONTROLLER

82077AA
Phase
RW
D₇
Command W
0
W
0
W
W
W
W
Execution
For Each
W
Sector
W
Repeat
W
W
Result
R
R
R
R
R
R
R
Command W
MT
W
0
W
W
W
W
W
W
W
Execution
Result
R
R
R
R
R
R
R
Command W
MT
W
0
W
W
W
W
W
W
W
Execution
Table 5-1 82077AA Command Set (Continued)
D₆
D₅
MFM
0
0
0
DATA BUS
D₄
D₃
D₂
D₁
D₀
FORMAT TRACK
0
1
0
0
N
SC
GPL
D
1
0
1
HDS
DS1
DS0
Remarks
Command Codes
Bytes Sector
Sectors Cylinder
Gap 3
Filler Byte
C
H
Input Sector
R
Parameters
N
82077AA formats an entire
cylinder
MFM
SK
0
0
ST 0
ST 1
ST 2
Undefined
Undefined
Undefined
Undefined
Status information after
Command execution
SCAN EQUAL
1
0
0
0
C
H
R
N
EOT
GPL
STP
0
0
1
Command Codes
HDS
DS1
DS0
Sector ID Information
Prior to Command
Execution
Data Compared
Between the FDD
and Main-System
MFM
SK
0
0
ST 0
ST 1
ST 2
C
H
R
N
Status Information
After Command
Execution
Sector ID Information
After Command
Execution
SCAN LOW OR EQUAL
1
1
0
0
C
H
R
N
EOT
GPL
STP
0
0
1
Command Codes
HDS
DS1
DS0
Sector ID Information
Prior to Command
Execution
Data Command
Between the FDD
and Main-System
20