Commodore PET User Manual page 155

File is opened for read.
Lists the first 16 characters of ail files
found. if any. between beginning tape
position and filename location.
Format for named file.
Format for unnamed file.
OPEN for Read
When the OPEN statement is executed to open a tape cassette unit for a
read. the PET will display the following message if no tape control keys are
pressed:
PRESS PLAY ON TAPE #1
OK
1
when a tape control key is depressed: tape begins moving.
It then reads the tape header. In immediate mode the messages continue as
follows (bracketed items are shown if a filename was specifiedl:
SEARCHING [FOR filename]
FOUND filename a
FOUND filename b
FOUND filename c
FOUND filename d
FOUND
FOUND [filename]
READY.
ln program mode the above block of messages is not displayed.
OPEN for Write
When the OPEN statement is executed to open a tape cassette unit for a
write. PET will display the following message if no tape control keys are pressed:
PRESS PLAY & RECORD ON TAPE #1
OK • when a tape control key is depressed: tape begins moving.
Itthen writes the tape header and tape movement stops.
Examples:
142
OPEN 1
OPEN 1.1
OPEN 1.1.0
OPEN 1.1.0."DA
r
OPEN 3.1.2
OPEN 3.1.2."PENTAGRAM"
Open logical file 1 for cassette #1
(default). code read (default) from the first
file encountered on the tape (no filename
specifiedl.
Same as above.
Same as above.
Same as above but from the file named
DAT.
Open logical file 3 for cassette # 1. code
write and EOT to the next space on the
tape. The new file is unnamed.
Same as above but give the file name
PENTAGRAM.