Field Test Unit Software
6.1.3 P COMMAND
The P command allows you to PUT new data to memory. Only one byte
location may be
altered
at a time. The location altered is the first byte dis-
played (the one indicated by the status line). The new value must be between
0 and 255. Use the ‘S & D’ keys to step backwards and forwards to adjacent
locations to be altered.
6.1.4 CURSOR KEY COMMANDS
The Cursor Keypad (at the top right of the
FTU
keyboard) step the dis-
played location backwards (or forwards) one byte using the &
-
command
keys, and backwards (or forwards) four bytes using the ^
&
V
command
keys.
6.1.5 ‘space’ COMMAND
The ‘space’ bar toggles the display between ‘byte mode’ (4 individual byte
display) and ‘integer mode’ (4 byte, 32 bit single integer).
6.2 INITIALlZATlON
The initialization sequence should be avoided if possible. The
FTU
will in-
itialize if the batteries are removed or go flat. Therefore the batteries should
be changed when the
low
battery warning appears and should be changed
with the power pack inserted so as the memory does not lose power.
However if the program contained in the FTU has been lost, perform the
following sequence.
(<RET > in the following sequence is the lower right hand key marked
“RETURN” and
$
is the dollar sign appearing above the 4)
Type in the program appearing at the end of the Section
Enter “START$ =
“RUN”
+
CHR$(l3)
Enter
‘OFF1
<RET >
“\
The field test unit will power down and when next press the on button the
FTU should appear as normal.
The following is a table of addresses versus channel viewed on the Field Test
unit.
Section
6. NFTU
COMMANDS 29