GM82C765B Datasheet, PDF (25/36 Pages) Hynix Semiconductor – FLOPPY DISK SUBSYSTEM CONTROLLER

GM82C765B
TABLE 16. READ ID
PHASE
COMMAND
EXECUTION
R/W D7 D6 D5 D4
W
0 MF 0 0
W
X X XX
D3 D2 D2 D0
REMARKS
1
X
0
HS
1
US1
0
US0
Command Codes
The first correct ID information on the
cylinder is stored in Data Register.
RESULTS
R
R
R
R
R
R
R
STO
Status information after command
ST1
execution.
ST2
C
Sector ID information after command
H
execution.
R
N
TABLE 17. FORMAT A TRACK
PHASE
R/W D7 D6 D5 D4
D3 D2 D2 D0
REMARKS
W
0 MF 0 0
COMMAND
W
XXXX
1
X
1
HS
0
1
US1 US0
Command Codes
W
N
Bytes / Sector
W
SC
Sector/Track
W
GPL
Gap 3
W
D
Filler Byte
EXECUTION
Floppy Disk Controller (FDC) formats
an entire track.
RESULTS
R
R
R
R
R
R
R
STO
ST1
ST2
Status information after command
execution.
C
H
R
In this case, ID information has no
meaning.
N
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