| Syntax |
t-bck {number}
|
| Category |
Tape
|
| Type |
Verb
|
| Description |
"backspaces" the tape to the end of the previous file or a specified number of blocks.
|
| Options |
number Indicates the number of blocks to backspace. If "number" is not specified, the tape backspaces to a position immediately preceding the previous eof mark, or to load point. Before reading the next file, a "t-fwd" must be issued to position the tape after the eof mark.
|
| See Also |
t-bsr t-fwd t-eod tape handling verbs t-bsf t-space t-bck
|
| Example |
|
| Warnings |
"t-bck" is only reliable on floppies and half-inch tapes.
SCT's can not go backwards, so "t-bck" may fail. The last block read MAY still be in the buffer, which can be useful for reading labels. SCT's usually must be rewound ("t-rew") and moved forward ("t-fwd" or "t-space") to the desired tape file.
|
| Compatibility |
D3 7.0 AP R83
|