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D765 Datasheet(PDF) 15 Page - NEC

Part # D765
Description  Single/Double Density Floppy-Disk Controller
PDF  17 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

D765 Datasheet(HTML) 15 Page - NEC

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Table 4. Instruction Set (Notes
code
Phase
Remarks
Scan
or
Command
MT
MF
SK
1
1
0
0
1
X
X
X
X
X
HD
US,
C
H
N
EOT
GPL
STP
Command codes
Sector ID
to command
Data comoared between the FDD and
Result
ST1
ST2
C
R-
R
N
Status
after
command execution
Sector ID Information after command
Scan High
Equal
Command
W
MT
MF
SK
1
1
1
0
Command codes
w
X
X
X
X
X
US,
w
C
Sector ID information prior to command execution
w
W
W
N
W
W
w
EDT
GPL
STP
Execution
Result
Data compared between the FDD and
system
Status Information after command
ST1
ST2
C
Sector ID information after command
H
R-
R
Command
W
o
0
0
D
11
Command codes
W
x
x
x
x
x
0
Head retracted to track 0
Sense Interrupt Status
Command
Result
w
00
0
0
1
000
Command codes
Status Information about the FDC at the end of seek
PCN
Specify
Command
W
0
0
0
0
0
0
11
Command codes
W
SRT
HUT
W
HLT
ND
Sense Drive Status
Command
W
0
0
0
0
D
0
0
Command codes
W
X
X
X
X
X
HD
US,
Result
ST3
Status
about FDD
5-17



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