Dan wrote that "MRSP was certainly documented." I don't
doubt it, but I'd love to see the reference. When I started playing
with emulation I purchased the "TU58 DECtape II Technical Manual (Sep 1979)"
which is now available no line. The VT103 User's Guide from the same period
has the same description of RSP and sadly doesn't cover MRSP. So if anyone
stumbles across it I'd be very interested. I'll publish what I eventually
figure out.

Your comments that only some TU58 had the smarts to do MRSP is instructive
as well
as the fact that RSX does it at startup to test this. That is the behavior the
guy who sent me a patch suggested, and it makes more sense now. Maybe I
can duplicate it. In the meantime I will reluctantly take Johnny's
suggestion and
look at the driver source code. I'd been dragging my feet on that as I
haven't done
Macro-11 in six years but I guess its time.

Thanks
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