> On Jun 10, 2017, at 4:59 PM, Mattis Lind via cctalk <cctalk@classiccmp.org>
> wrote:
>
>> ...
> BTW. Speaking of dumping. Now that I have a TC11 / TU56 that seems to be
> working, what is the best way to dump 18 and 12 bit tapes? Is there some
> PDP-11 OS that can do it or is it assembly programming required? I had
> hopes that RT11 had such features but it doesn't seem like it could read
> all 18 bits.
>
> Has this already been done? Maybe I can spend time on other things than
> re-inventing the wheel...
RT-11 FILEX can read TOPS-10 format DECtapes. I don't remember if it does
PDP-8 DECtapes, that's a bit harder because the block size is different.
If you want a raw block by block dump, I don't know about tools for that,
though a look at the FILEX source code should give you some ideas. Or the tape
formatter code, for that matter; the basic idea is to put the RALL function to
work.
John Wilson might have some ideas.
paul
