Tandy 1400LT Service Manual page 299

Instruction
Set (4)
Instruction Code
-
Phase R/W D, Ds D, D, D, D, D,
Do
Remarks
Read ID
Command W 0
MF
0 0 1 0 1 0 Command codes
W X X X X X HD US, US,
Execution
Result R i STO Status information after command execution
The first correct ID information on the cylinder is stored in
data register.
R 4 : ST 1
f
R i ST2
f
R + C Sector ID information read during excecution phase from
R i H
floppy disk.
R + - R
f
R i N
f
Format a Track
Command W 0 MF 0 0 1 1 0 1 Command codes
W
X X X X X HD US, US,
w i
N
Bytedsector
w i sc
Sectors/track
W e GPL G a p 3
w .
D Filter byte
Execution
Result R i STO
+
Status information after command execution
FDC formats an entire track.
R + ST 1
R i ST2
f
R + - C
f
In this case, the ID information has no meaning
R i H
f
R + - R
f
R + N +
~
Scan Equal
Command W MT
MF SK
1 0
0 0 1
Command codes
W X
X X
X X HD US, US,
W + C
+
Sector ID information prior to command execution.
w .
H
f
w +
R
w i
N
f
w i
EOT
f
W + GPL
w .
STP
f
R i ST 1 +
R i ST2
f
R i
C
f
Sector ID information after command execution.
Result R e STO Status information after command execution
R + - H
R + R
R i N
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