Special Symbols, Commands and Statements (Continued) When the SHIFT key is not pressed, the keys will perform different functions, as indicated: SYMBOLS, COMMANDS, STATEMENTS EXAMPLE PURPOSE 10 A$-"ABCDEFG" String identifier. % 10 A%=INT(X) Integer Stops execution of command in progress (LIST, LOAD, RUN, etc.). identifier. 10 A$="ABCDEF" String enclosures. carriage return Must follow every command, statement, or data entry; causes cursor to return to leftmost position on next lowest line. Signals "END OF INPUT LINE." TT (pi) Value of Pi: 3.1415927. 11 Returns cursor to upper left corner of screen. Moves cursor one space down.
When cursor is at bot- tom of screen, print will scroll off top of screen. Does not delete characters as it passes over them. I/0 Commands SYMBOL COMMAND PURPOSE Moves cursor one space right. Will wrap around to left most position of next lowest line. Does not delete characters as it passes over them. L=1 -255 C=O: READ OPEN L,D,C Note: PET will not read past C=1: WRITE an EOT (end of tape) marker. C=2: WRITE AND PUT EOT at end of file. D=1 CASSETTE D=2 2ND CASSETTE D=4-15 IEEE BUSS 3. Special keys Enables reverse field print (black characters on a white background). Deletes character immediately to left of cursor. All characters to right of deletion are moved one space left.
Line is filled with trailing blanks if needed. The following keys, when pressed while the being held down, will perform the following functions: STOP key is LOADS and RUNS the next encountered program from the built-in tape unit. 4. Cleaning your PET With power switch in "OFF" position, gently wipe keytops with a slightly damp cloth. Do not flood with water. Clears print from screen and moves cursor to upper left corner of screen. Program statements and all variables are retained. Use any of the available lens-cleaner sprays to clean the video screen. Spray screen lightly, and dry with a soft, non-linting cloth or tissue. Moves cursor one space up. Will not scroll off top of screen.
Does not delete characters as it passes over them. Wipe the cabinet with a soaped, well-wrung sponge. Do not use any commercial abrasive cleaners. Rinse by wiping with clean, slightly damp sponge or soft cloth. Do not immerse in water. Moves cursor one space left (backspace). Wraps around to rightmost position on next highest line. Does not delete characters as it passes over them. Clean the recorder unit inside by touching dust particles with slightly damp cloth or sponge. Do not wipe surface ... cloth will snag on metal or plastic parts and may cause breakage.
(See next section for more detailed instructions.) The outside of the recorder unit may be cleaned in the same manner as the keytops. Resets reverse field printing to normal printing. Inserts a space immediately in cursor position. All characters to right of inserted space are moved one space to right. Stops when 80th character is filled. 46 j www.commodore.ca 47 Free for personal use but you must have written permission to reproduce