Tandy 1400LT Service Manual page 296

Instruction Code
-
Phase R/W D, D, D, D, D, D, D, Do Remarks
Execution Data transfer between the FDD and main system
Result R * STO
'
Status information after command execution
R i ST 1 +
R i ST2
-+
R i C
+
Sector ID information after command execution
R +
H
'
R + R
Write Deleted Data
Command W MT MF 0 0
1
0 0 1 Command codes
W X X X X X HD US, US,
w +
C
+
Sector I D information prior to command execution. The 4
W +
H
- +
bytes are compared against header on floppy disk.
w +
R
+
w i
N
'
w i
EOT
+
W +
GPL
'
w +
DTL
-*
~
Execution
Result R
R
R
R
R
R
R
Data transfer between the FDD and main system
c
STO
'
Status information after command execution
i
ST 1
-+
i
ST2
'
4-
C Sector ID information after command execution
+
H
'
i
R
N +
Scan Low or Equal
Command W MT MF SK 1 1 0 0
1
Command codes
W X X X X X HD US, US,,
w *
C Sector I D information prior to command execution.
w .
H
-+
w i
R
'
w i
N
w i
EOT
'
w i
GPL
'
W + STP
'
Execution
Result R i STO
+
Status information after command execution
Data compared between the F D D and main system.
R i ST 1
'
R + ST2
'
R i C Sector ID information after command execution
R i H
'
R + R
F-27