[Simh] PDP11 DZ-Driver and RSX11M
Hittner, David T.
david.hittner at ngc.com
Wed Dec 3 16:51:59 EST 2008
Try:
scp> set dz lines=<n>
Default lines is 4 for a dzv11 (qbus), I think. Might be 8 for a dz11
(unibus).
Make sure your system sysgen matches the scp-defined number of dz lines
for proper behavior. :-)
Dave
> -----Original Message-----
> From: simh-bounces at trailing-edge.com
> [mailto:simh-bounces at trailing-edge.com] On Behalf Of Holger Veit
> Sent: Wednesday, December 03, 2008 3:28 PM
> To: Tim Shoppa
> Cc: simh at trailing-edge.com
> Subject: Re: [Simh] PDP11 DZ-Driver and RSX11M
>
> Tim Shoppa schrieb:
> > Holger Veit <holger.veit at iais.fraunhofer.de> wrote:
> >
> >> I am currently trying to get the simh DZ11 device to work
> with RSX11M
> >> 4.4 BL46, to test serial stuff. I have generated a new system with
> >> support for the card in, and VMR reports that it has TT1:
> to TT10: (TT0:
> >> is the CO: resp. YL: device which works). I have used the CSRs and
> >> vectors that simh reports on DZ, something like 17760100
> (or 160100
> >> in 16bit speak) and vector 300, but when I boot the new system, it
> >> will report the various disk devices I have generated, but
> none of the DZ mux
> >> devices at all. I observed that simh SHO DEV reports
> the vectors
> >> for
> >> 8 lines as 300-304 (or with 16 lines as 300-314) which should be
> >> 300-307, but this is maybe just a fallacy of the
> show_vec() routine.
> >> In case this would be a bug I tried to fool simh/RSX by
> telling simh
> >> to have 16 lines (300-314) but only generating 4 lines (YZ =
> >> 300,160100,3, in sysgen) but this doesn't make a difference.
> >>
> >> Did I forget anything - my RSX knowledge has come to age a bit, or
> >> has the The Last Bug(tm) popped up here?
> >>
> >
> > It's been a long time, but I believe that by default SIMH
> is a Q-bus
> > processor, and there DZ11 support means DZV11 support, which is only
> > 4 lines.
> >
> > I don't know whether this is happening inside SYSGEN or in
> the driver,
> > I suspect not in SYSGEN because you do end up with 8
> generated lines
> > in the tables. So try cajoling things into building for a
> Unibus machine.
> >
> Hi,
> thanks for the hint, but I already tried to generate for an
> emulated 11/23+ (Qbus) as well as an 11/44 (Unibus), no
> difference in behaviour.
>
> The PDP-11 simh docs at trailing-edge don't explicitly
> distinguish between DZ11 and DZV11, but SYSGEN docs
> (AA-H625C-TC) describe the YZ driver generated into RSX as
> valid for both. So I guess whatever SIMH actually provides,
> it should be recognized.
> And mentioned SIMH infact claims to emulate 8 lines per DZ
> device, just what SYSGEN accepts (it breaks the @SYSGEN
> dialogue when I try to generate 4 YZ boards, i.e. 32 lines,
> but this is a different story).
>
> Regards
> Holger
>
>
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