Table of Contents
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Data Bus
Phase
R/W
07 06 05 04 03 02 01
DO
Remarks
Write Data
Command
W
MT MF
0
0
0
1
0
1
Command Codes
W
X
X
X
X
X
HD US1
usa
W
C
Sector ID information
W
H
prior to command
W
R
execution.
W
N
W
EOT
W
GPL
W
DTL
Execution
Data transfer
between the main
system and FDD.
Result
R
STO
Status information
R
ST 1
after command
R
ST 2
execution.
R
C
Sector ID information
R
H
after command
R
R
execution.
R
N
Write Deleted Data
Command
W
MT MF
0
0
1
0
0
1
Command Codes
W
X
X
X
X
X
HD US1
usa
w
C
Sector ID information
W
H
prior to command
W
R
execution.
W
N
W
EOT
W
GPL
W
DTL
Execution
Data transfer
between the FDD and
main system.
Result
R
STO
Status ID information
R
ST 1
after command
R
ST 2
execution.
R
C
Sector ID information
R
H
after command
R
R
execution.
R
N
Diskette Adapter 9
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