GM82C803CN Datasheet, PDF (40/84 Pages) List of Unclassifed Manufacturers – 2.88 MB FDC/ Dual UARTs with FIFO/PIO(EPP/ ECP)/ IDE Interface/ S-IR/ PnP

GM82C803CN
FORMAT A TRACK
PHASE R/W D7 D6 D5 D4
D3 D2 D1 D0
R/W
COMMAND ^W
W
0 MF ⁰
0
XX
X
X
1
1
0 1 Command Codes
X HS DS1 DS0
W
N
Bytes/Sector
W
SC
Sector/Track
W
GPL
Gap 3
W
D
Filler Byte
EXECUTION
Floppy Dik Controller
(FDC) formats an
entire track.
RESULTS ^R
R
R
R
R
R
R
ST0
Status information
ST1
after command
execution
ST2
C
In this cae, the ID
H
information has no
R
meaning.
N
PHASE R/W D7 D6 D5
COMMAND ^W
W
MT MF ^SK
XX
X
W
W
W
W
W
W
W
EXECUTION
RESULTS R
R
R
R
R
R
R
SCAN EQUAL
D4
D3
1
0
X
X
C
H
R
N
EOT
GPL
DTL
ST0
ST1
ST2
C
H
R
N
D2 D1 D0
R/W
0
0 1 Command Codes
HS DS1 DS0
Sector ID information
prior to command
execution.
Data transfer between
FDD and main system
Status information
after command
execution
Sector ID information
after command
execution