On 11/8/16 1:43 PM, Noel Chiappa wrote:
> From: Josh Dersch
> If I run them on SIMH configured as an 11/44, I see the same behavior.
> If I run them on SIMH configured as an 11/20, then I get the printout
> described in the documentation and listings. ... I haven't yet dug in
> to see what accounts for the difference -- any ideas?
The fact that the simulator produces identical results to the real hardware
would argue that it's not a bug in that particular hardware. So it must be
some real difference between the two.
There are subtle differences between the 11/20, and other 11's - e.g. on the
/20 SWAB does't clear the V bit - maybe it's one of them? It might be worth
trying setting the CPU type to other values, and see if it works on any other
machine type.
Turns out it's the XXDP XM monitor causing the issues (I would wager
that it sets up the MMU in such a way that older diagnostics don't deal
well). If I run it under the SM Monitor it works. Whew :).
> 2) I'm looking for means to format DECtapes on the TC11. ... The
> maintenance manual only indicates "a special program supplied with the
> TC11 system," and I haven't managed to find it.
The UNIX V6 distro includes a standalone program, tcf.s, to format DECtapes.
I don't know if you have a running V6 system (real or emulated) to assemble
it one; if you want me to assemble it and provide it as binary (in a variety
of formats, e.g. .LDA format), let me know.
I could probably get a V6 distribution running if I need to, but if you
have the means to do so easily, that would be handy so I can at least
have another tool to try out. Something that XXDP can load would be useful.
Thanks,
Josh
Noel
