[Simh] PDP11 DZ-Driver and RSX11M

[Hittner, David T.]

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
> 
>