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D765 Datasheet(PDF) 14 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) 14 Page - NEC

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Table 4.
Set (Notes
instruction Code
Remarks
Read
Command
W0
MF
0
0
1
0
Command codes
W
X
X
X
X
X
HD
US,
Executron
The first correct ID
on the cylinder
stored
data
register.
Status information after command execution
ST1
ST2
C
Sector ID
read during executron phase from floppy
H
N
ID
Command
W
MF
1
1
1
Command codes
Result
w
X
X
X
X
X
HD
US,
W
N
Bytes/sector
WS C
Sectors/track
W
GPL
Gap3
W
byte
FDC formats an entire track.
Status information after command execution
ST1
ST2
C
In this case, the ID
has no
H
R-
R
N
Scan
Equal
Command
W
MT
SK
1
0
0
0
1
Command codes
W
X
X
X
X
X
US,
W
C
Sector
command execution
W
H
w
W
W
EOT
w
GPL
W
STQ
Execution
Data
between the
and main
Result
ST1
Status
after command execution
ST2
C
H
Sector ID information after command
fl
N
Note:
(1)
Symbols used
this table are described at the end of this section
should equal 1 for all operations.
(3) X
Don’t care, usually made to equal 0.
5-16



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