Instruction Set
(1)
-
Instruction Code
Phase R/W D, D, D, D, D, D, D, Do Remarks
Read Data
Command
W
MT MF
SK
0
0
1 1
0
Command codes
W
W
W
W
W
W
W
W
X X X X
X HD
US,
US,
t
C
--+
Sector ID information prior to command execution. The
4
c
H
-+
bytes are compared against header on floppy disk.
t
R
--+
c
N
-+
t
EOT
--+
c
GPL
-+
t
DTL
--+
Excution
Data transfer between the FDD and main system
Result Re STO
-+
Status information after command execution
Rt
ST
1
--+
Ri ST2
-+
Rt C
*
Sector ID information after command execution
Re
H
Rc R
-+
Rt
N
--+
Note:
(1)
In the Instruction Code, X=don’t care (usually set to
0).
(2)
A,,
should be
0
for
SET STANDBY, RESET STANDBY,
and
SOFTWARE RESET
commands and
1
for all
other commands.
Instruction Set
(2)
-
Instruction Code
Phase
R/W
D, D, D, D, D, D, D, Do
Remarks
Read Deleted Data
Command
W
W
W
W
W
W
W
W
W
MT MF
SK
0
1 1
0 0
Command codes
t
C
Sector ID information prior to command execution. The
4
c
H
*
bytes are compared against header on floppy disk.
i
R
f
t
N
i
EOT
-+
t
GPL
-+
c
DTL
-+
X X
X
X
X HD
US,
US,
Execution
Data transfer between the FDD and main system
Result Rt STO
r
Status information after command execution
Ri ST
1
-+
R< ST2
Ri C
+
Sector ID information after command execution
Rt H
Ri R
f
Rt
N
z
Write Data
Command
W
W
W
W
W
W
W
W
W
MT MF
0
0
0
1
0
1
Command codes
c
C Sector ID information prior to command execution. The
4
t
H
’
bytes are compared against header on floppy disk.
c
R
f
c
N
-+
i
EOT
c
GPL
-+
i
DTL
r
X
X
X
X X
HD
US,
US,
F-26
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