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Related Manuals for Commodore C2N
Summary of Contents for Commodore C2N
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Page 2: Cassette Unit
OPERATING INSTRUCTIONS FOR YOUR C2N CASSETTE UNIT A COMMODORE C2N cassette unit is a device for storing and/or recalling computer programs on ordinary cassette tapes. It can be used for saving programs you have written and want to recall for later use. It can also be used to read pre-recorded programs that you have purchased. - Page 3 YOUR COMPUTER Important information about your cassette unit The COMMODORE C2N cassette unit is supplied with a cord attached. This cord connects the cassette unit to the computer. Power is supplied from the computer to the unit through this cord. The computer and the cassette communicate through the cord as well.
- Page 4 FOR CBM/PET COMPUTER USERS For CBM/PET computers, 4000 and 8000, the cassette unit plugs on to a connector at the back of the computer.
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Page 5: Preliminary Checkout
PRELIMINARY CHECKOUT Before using your cassette drive unit to recall or store programs, you should complete the preliminary checks—which are described below: STEP 1 Turn off the computer and plug in the cassette unit. STEP 2 Ensure that the cassette deck motor is off by checking that all of the function keys are up. - Page 6 STEP 4 Press the PLAY button on the cassette unit. Look to see that, as the button is engaged, the READ/WRITE heads move towards the spindles and the capstan comes into contact with the pinch roller (see Fig. 1). The take-up spindle should be moving smoothly in a counter-clockwise direction.
- Page 7 OPERATIONS TEST To test the operation of your new cassette unit, let's write a short program, SAVE it on to the cassette, and LOAD it back into the computer. Obtain a blank cassette (no special cassette is required) and place it in the cassette unit.
- Page 8 STEP 5 Erase the memory by typing: then press <RETURN>. The display will show: READY STEP 6 Type: LIST then press <RETURN>. The display will show: READY indicating that the memory is blank. STEP 7 Rewind the cassette by pressing REW, then STOP when the tape is at the beginning.
- Page 9 CARE OF TAPES Be careful to rewind all tapes to the beginning after use as this protects the recording from abrasion and contamination. Do not store or place any tapes near strong magnetic fields such as may occur near loudspeakers, or large motors. CASSETTE MAINTENANCE The cassette uses magnetic heads to record and retrieve the information on the cassette tapes.
- Page 10 CLEANING AND DEMAGNATIZING YOUR CASSETTE HEADS You'll need the following tools and materials: Tape head cleaner. Alcohol may be used in emergency, but is not recommended for long term use. NOTE: Do not use trichloroethane or any other plastic or rubber solvent. Cotton swabs.
- Page 11 FOLLOW THIS PROCEDURE STEP 1 Turn the computer off. STEP 2 Press STOP/EJECT to open cover, the press PLAY to expose heads. STEP 3 Put tape head cleaner on one side of a cotton swab. Gently wipe the surfaces of RECORD/PLAY and erase head (see Fig.
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Page 12: Cassette Operation
CASSETTE OPERATION Commands Here are the commands that will activate your cassette drive unit. Simply type the desire command and press <RETURN>. In the list of commands below, NAME stands for the name that you, the user, assigns to your program. You should select a name that will distinguish that program from other programs (or data files) on the same tape. - Page 13 Example: VERIFY”TEST” will search for and VERIFY the program named TEST on the cassette unit. If the computer responds with READY. then the program has been stored correctly. If, however, the computer responds with VERIFY ERROR READY then the program on the tape has not been stored properly. Re-SAVE the program and VERIFY again.
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Page 14: File Handling
FILE HANDLING Experienced programmers may write more sophisticated programs that use large amounts of data. This data may be stored o a file on the cassette. The commands to handle data files are explained below. Files of data can be written to and read from the cassette unit. These CANNOT be LOADed like a program, but can be read from by a program. - Page 15 If a value of 2 is chosen for C and “TEST” is chosen for the name, this will WRITE an End-Of-Tape marker at the end of the file. If the computer is then told to read a file which is after the file “TEST”, then when the computer has passed TEST it will respond with: FILE NOT FOUND ERROR and stop.
- Page 16 CLOSE A will close the file designated A, where A refers to the file number. WARNING: If this command is not used after all the data has been written to the cassette, some data may not be written to the cassette.
- Page 17 Here are some sample program segments which use the above commands: Example Program 1 – Writing Data 10 OPEN1,1,1,”TEST FILE” 20 FOR I=1 TO 10 30 PRINT#1,I 40 NEXT 50 CLOSE 1 Line 10 OPENs file 1 for WRITE as TEST FILE. Line 20 Do everything between “FOR”...
- Page 18 CASSETTE DECK PROBLEMS If you are experiencing problems with your cassette deck either mechanically or electronically, return it to the dealer from whom it was purchased. If the cassette deck is faulty and in warranty he will replace it for you.