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TAPCOPY Program Abstract
TAPCOPY copies MAGtapes bit for bit, using dump mode I/O,
using industry mode if both tapes are 9-track. Blocksize is determined
by reading the tape. If the block does not fit in core, TAPCOPY
expands the low segment, backspaces the input tape, and tries again.
Tape error messages interpret each status bit as per Monitor Calls
manual. Copies to double end-of-file mark. Initial size: 2+1P.