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Commodore 1531 Datassette User Manual page 14

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VERIFY" NAME"
will VERIFY that the program which has been SAVEd has been stored
correctly.
Example: VERIFY'TEST"
will search for and VERIFY the program named TEST on the cassette.
If the computer responds
with
then the program has been
stored correctly. If, however,
the computer responds with
then the program on the tape has not been stored properly. Re-SAVE the
program and VERIFY again. If this still fails, then the DATASSETTE™ is not
working properly, the tape is of poor quality, or the tape heads need cleaning.
NOTE: VERIFY can be used to skip through a tape in order to SAVE a new
program at the end of other programs. The technique to use is
described here:
When you are ready to store the new program that is in your
computer, give the command VERIFY"NAME" using the name of the
last program on the tape. The computer will search for and VERIFY
this last program on the tape, bypassing all other programs. Because
the last program is not the same as the new program currently in
memory, the display will read; VERIFY ERROR but the tape will have
advanced to the end of all the programs on the tape. You can then
SAVE your new program, typing SAVE" NAME", where NAME is the
unique name of the new program that is in your computer. The new
program is now on the cassette immediately after the other programs.
OK
READY
VERIFY ERROR
READY

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