Sharp PC-1403 Operation Manual page 222

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50 IF A>L THEN PRINT "A"
and results in an error when it is entered through the keyboard.
The error occurs because a command which does not exist in the PC-121 O Series
does in fact exist in the PC-1403. To solve this problem, insert a THEN command
into the IF statement as follows.
50 IF A>LPRINT "A" (Print out "A" if A>)
(1) IF statement
If, for example,
50 IF A>L PRINT "A" (display "A" if A>L)
is found in the program for the PC-121 O Series Pocket Computers, it is interpreted
as
To use PC-1210 Series programs on the PC-1403, they must be modified in the same
way as PC-1245 Series programs except items (2) and (7). I n addition, the following
modifications are necessary.
Modifications Required for PC-1210Series
(1) The PC-1245 Series uses a line number rangi n g from 1to999, whereas the PC-
1403 has an extended line number ranging from 1 to 65279. Therefore, the line
number uses 3 bytes in RAM (PC-1245 Series uses 2 bytes). The modification is
carried out automatically when the program is loaded through the cassette tape.
However, there is a possibility of memory overflow (ERROR 6) when l o ading or
execuiing a long program. Further, when a singie line is close to 80 bytes long,
this modification may result in the erasing of the end of the line.
(2) If the tape stops or the read alarm stops when readi n g a program from a tape with
PC-1245 Series programs, the computer will remain busy for 1 or 2 seconds and
two asterisks will appear i n the display.
This is because the computer is modifying the li n e numbers as described in (1}
above.
Additional modifications
APPENDIXG
Using Programs Written on Other PC Models