values you may become satisfied that your
program is functioning correctly. You
should then type in CONT to Continue
executing your program where it left off, or
type a direct GOTO statement to resume
execution of the program at a different line.
You could also use assignment statements
to set some of your variables to different
values. Remember, if you interrupt a
program with the F1 key and expect to
continue it later, you must not get any
errors or type in any new program lines.
If you do, you won't be able to continue
and will get a "CN" (continue not) error.
It is impossible to continue a direct
command. CONT always resumes
execution at the next statement to be
executed in your program when F1 was
typed.
STATEMENT SYNTAX/FUNCTION EXAMPLE
FRE FRE (expression) 270 PRINT FRE(0)
Gives the number of memory bytes
currently unused by BASIC. A dummy
operand--0 or 1--must be used.
STATEMENT SYNTAX/FUNCTION EXAMPLE
LIST LIST [[start line] [-[end line]]]
Lists current program optionally starting at
specified line. List can be interrupted with
the F1 key. (BASIC will finish listing the
current line.)
Lists entire program LIST
Lists just line 100. LIST 100
Lists lines 100 to 1000. LIST 100-1000
Lists from current line to line 1000. LIST -1000
Lists from line 100 to end of program. LIST 100-
STATEMENT SYNTAX/FUNCTION EXAMPLE
LOAD LOAD LOAD
Loads a BASIC program from the cassette
tape. When done, the LOAD will display
the cursor. See Appendix G for more
information.
STATEMENT SYNTAX/FUNCTION EXAMPLE
NEW NEW NEW
Deletes current program and all variables.
STATEMENT SYNTAX/FUNCTION EXAMPLE
PEEK PEEK (address) 356 PRINT PEEK(I)
The PEEK function returns the contents of
memory address I in decimal. The value
returned will be =>0 and <=255. If I is
>65535 or <0, an FC error will occur.
An attempt to read a non-existent memory
address will return an unknown value.
STATEMENT SYNTAX/FUNCTION EXAMPLE