GM82C765B Datasheet, PDF (23/36 Pages) Hynix Semiconductor – FLOPPY DISK SUBSYSTEM CONTROLLER

TABLE 12. READ DELETED DATA
GM82C765B
COMMAND
EXECUTION
RESULTS
R/W D7 D6 D5 D4
W MT MF SK 0
W XX XX
D3 D2 D2 D0
REMARKS
1
X
1
HS
0
US1
0
US0
Command Codes
W
C
Sector ID information prior to
W
H
command execution. The four bytes
W
R
are compared against header on floppy
W
N
disk.
W
EOT
W
GPL
W
DTL
Data transfer between FDD and main
system
R
STO
Status information after command
R
ST1
execution.
R
ST2
R
C
Sector ID information after command
R
H
execution.
R
R
R
N
TABLE 13. WRITE DATA
PHASE
COMMAND
EXECUTION
RESULTS
R/W D7 D6 D5 D4
W MT MF 0 0
W
XX XX
D3 D2 D2 D0
REMARKS
0
X
1
HS
0
US1
1
US0
Command Codes
W
C
Sector ID information prior to
W
H
command execution. The four bytes
W
R
are compared against header on
W
N
floppy disk.
W
EOT
W
GPL
W
DTL
Data transfer between FDD and main
system
R
STO
Status information after command
R
ST1
execution.
R
ST2
R
C
Sector ID information after command
R
H
execution.
R
R
R
N
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