[Simh] Issues with VH simulation and 4.3BSD-Quasijarus

[Cory Smelosky]

Clem Cole wrote:
> Mark... as an FYI if it is of any help..
>
> VH      address=2013E120-2013E15F*, vector=C0-DC*, BR4, lines=64, 4
> units
>    VH0     attached to 8070, DHU mode, Modem
>          0 current connections
>    VH1     DHU mode
>    VH2     DHU mode
>    VH3     DHU mode
>
> device          dhu0    at uba? csr 0160440             vector dhurint
>
> It's been years since, I did this stuff...
>
>  1.   0160400 is 0xE120  and 0160400 certainly looks right for the
>     Unibus address for a DH.

I'm getting 0xE100 - what am I missing?  Not awake enough today ;)

>  2.   I just can not speak for 0x2013E120 as what is the mapping into
>     the Vax address space, but I'll take your word for it that this is
>     correct - that is correct.
>  3. I never saw a real DEC DH on a Vax because of power and space issues.
>  4. That said, we used to mix DEC DH11s and Able DH11's on the PDP-11
>     all the time
>  5. Able DH11's were the most used serial controllers in BSD UNIX land
>     for a long, long time, which is why the default BSD configs all
>     probe for them.
>
>
>
>
> So ...If the DHV is supposed to the simh emulation of the combination of
> a DEC DH11 and DM11 pair (the DM11 was the modem control option for the
> DH), then this should "just work"
>
> That said, I'm not sure if VMS supported real DEC PDP-11 DH11/DM11's in
> Vaxen.  I have to believe they would have, but maybe not.  So its
> possible this has not been tested by folks.  I see that a lot of people
> running simh seem to want to use DZ's.
>
> I have not tried the vax simulator a long time - although when I first
> tried it, it was DZ only.   You pointed me at the VH emulation a few
> years ago, but I did not push it very hard.
>
> Thanks,
>
> Clem
>