GM82C803CN Datasheet, PDF (42/84 Pages) List of Unclassifed Manufacturers – 2.88 MB FDC/ Dual UARTs with FIFO/PIO(EPP/ ECP)/ IDE Interface/ S-IR/ PnP

GM82C803CN
RECALIBRATE
PHASE R/W D7 D6 D5 D4
D3 D2 D1 D0
R/W
COMMAND ^W
W
0
0
0
0
XX
X
X
0
1
1 1 Command Codes
X
0 DS1 DS0
Head retracted to Track
zero.
SENSE INTERRUPT STATUS
PHASE R/W D7 D6 D5 D4
COMMAND W
0
0
0
0
D3 D2 D1 D0
R/W
1
0
0 0 Command Codes
R
STO
Status information about
the FDC at the end of
R
PCN
seek operation.
SPECIFY
PHASE R/W D7 D6 D5 D4
COMMAND W
0
0
0
0
D3 D2 D1 D0
R/W
0
0
1 1 Command Codes
W
SRT
W
HLT
HUT
ND
SENSE DRIVE STATUS
PHASE R/W D7 D6 D5 D4
D3 D2 D1 D0
R/W
COMMAND ^W
W
0
0
0
0
XX
X
X
0
1
0 0 Command Codes
X
0 DS1 DS0
RESULTS ^R
ST3
Status information
about the FDC.
SEEK
PHASE R/W D7 D6 D5 D4
COMMAND ^W
W
0
0
0
0
XX
X
X
D3 D2 D1 D0
R/W
1
1
1
1 Command Codes
X
HS DS1 DS0
W
NCN
EXECUTION
Head is positioned over
proper cylinder on the
diskette.