V4/usr/man/man4/tc.4

Find at most related files.
including files from this version of Unix. 
.th TC IV 10/15/73
.sh NAME
tc \*- TC-11/TU56 DECtape
.sh DESCRIPTION
The files
.it "tap0 ... tap7"
refer to the
TC-11/TU56 DECtape drives 0 to 7.
.s3
The 256-word blocks on a standard DECtape are numbered 0 to 577.
.sh FILES
/dev/tap?
.sh "SEE ALSO"
tp(I)
.sh BUGS
Since reading is synchronous,
only one block is picked up per tape reverse.