GM82C803CN Datasheet, PDF (38/84 Pages) List of Unclassifed Manufacturers – 2.88 MB FDC/ Dual UARTs with FIFO/PIO(EPP/ ECP)/ IDE Interface/ S-IR/ PnP

GM82C803CN
PHASE R/W D7 D6 D5
COMMAND ^W
W
MT MF ⁰
XX
X
W
W
W
W
W
W
W
EXECUTION
RESULTS R
R
R
R
R
R
R
WRITE DATA
D4
D3
0
0
X
X
C
H
R
N
EOT
GPL
DTL
ST0
ST1
ST2
C
H
R
N
D2 D1 D0
R/W
1
1 0 Command Codes
HS DS1 DS0
Sector ID information
prior to command
execution. The four
bytes are compared
against header on
floppy disk.
Data transfer between
FDD and main system
Status information
after command
execution
Sector ID information
after command
execution
WRITE DELETED DATA
PHASE R/W D7 D6 D5
COMMAND ^W
W
MT MF ⁰
XX
X
W
W
W
W
W
W
W
EXECUTION
D4
D3 D2 D1 D0
R/W
0
1
0
0 1 Command Codes
X
X HS DS1 DS0
C
Sector ID information
H
prior to command
R
execution. The four
bytes are compared
N
against header on
EOT
floppy disk.
GPL
DTL
Data transfer between
FDD and main system
RESULTS R
R
R
R
R
R
R
ST0
Status information
ST1
after command
execution
ST2
C
Sector ID information
H
after command
R
execution
N