This account contains BIGTPC which is used to make copies of
the sig tape. BIGTPC can copy DOS,BRU, and DSC formatted tapes.
First one uses BIGTPC to read a master tape into a big disk file.
The file is as long as there are blocks on the tape. Then one uses
BIGTPC to read that file and copy it back to a blank tape. The bugs
in BIGTPC where it would hang up at the end are fixed.
To read a master tape onto a disk one uses the following command line:

RUN BIGTPC
TPC> DN:RSXSP81.BRU=MT:

To make a copy of the file onto a blank tape one uses the following command
line:

RUN BIGTPC
TPC> MT:=DN:RSXSP81.BRU

The only problem I know of with BIGTPC is that if you install it and use it
as follows:

TPC DN:RSXSP81.BRU=MT:

It will work, but the file RSXSP81.BRU will be in directory [0,0].