TOPS-20 Commands Reference Manual
Moves a magnetic tape set forward over a specified number of files or records, or to the logical end of the tape set.
@SKIP (DEVICE) dev: n units
|dev:||is the name of the tape set or magnetic tape drive that you want to move forward.|
|n||is the number of files or records over which you want to skip. The colon after the device name is optional.|
|units||is either FILES or RECORDS, where records are sections of a file; or
LEOT, to skip to the logical end of the tape set, which is the next point
on the tape set having two adjacent EOF (end-of-file) marks.
Default units - FILES
|BACKSPACE||for moving a magnetic tape backward a specified number of files or records|
|REWIND||for returning a magnetic tape to its load point|
|UNLOAD||for rewinding a magnetic tape completely onto the source reel (only for tapes mounted on drives having device names of the form MTAn:)|
- Skip over the next 2 files on the magnetic tape you are using (mounted
on magnetic tape drive MT0: in this case).
@SKIP MT0: 2 FILES
- Skip over the next two records on an unlabeled tape.
@SKIP MTA0: 2 RECORDS
- Use the MOUNT command to ask the operator to mount your tape in
write-enabled mode, then copy 3 files to the tape from your directory on
structure SNARK:. Use the REWIND command to go back to the beginning, and
the SKIP command to skip over the first file. Use the COPY command to have
the next file (FIL-2) printed on your terminal, then give the SKIP command
again to skip to the logical end-of-tape. You are skipping only one file,
FIL-3, in this case.
@MOUNT TAPE DAY:/WRITE-ENABLED [Mount Request DAY Queued, Request-ID 187] [Tape set DAY, Volume DAY mounted] [DAY: defined as MT0:] @REWIND DAY: @MOUNT STRUCTURE SNARK: Structure SNARK: mounted @ACCESS SNARK: @COPY SNARK:FIL-1.TAP DAY: SNARK:FIL-1.TAP.1 => MT0:FIL-1 [OK] @COPY SNARK:FIL-2.TAP DAY: SNARK:FIL-2.TAP.1 => MT0:FIL-2 [OK] @COPY SNARK:FIL-3.TAP DAY: SNARK:FIL-3.TAP.1 => MT0:FIL-3 [OK] @REWIND DAY: @SKIP DAY: 1 @COPY DAY: TTY: T0: => TTY: !THIS IS THE SECOND FILE.! @SKIP DAY:LEOT