> Date: Tue, 11 Jun 2002 16:41:27 +0200 (CEST)
> From: Johnny Billquist <bqt@update.uu.se>
> To: Chris Wareham <chris.wareham@iosystems.co.uk>
> cc: NetBSD Vax Mailing list <port-vax@netbsd.org>,
>         The PDP-11 mailing list <info-pdp11@village.org>
> Subject: Re: [OT] Any sources for PDP-11 spares?
> 
> On Tue, 11 Jun 2002, Chris Wareham wrote:
> 
> > Sorry for the off-topic posting, but this is the most relevant forum I
> > can think of for asking PDP-11 questions.
> 
> info-pdp11 is probably a better forum, but this will do.
> 
> > I have just acquired one of these machines, which looks quite modern but
> > appears to be of 1979 vintage. Does anyone know how I definitively work
> > out what model it is? As I say it looks quite modern, but a sticker on
> > the back say 11C23 which I guess makes it an 11/23. I poked around the
> > PUPS website, and can't find any pictures to confirm this.
> 
> If the sticker says 11C23 then it's most likely a 11/23, yes.
> 
> > It has a 75Mb drive and 512Kb of RAM, and I hope to stick 2.11BSD on it.
> 
> No can do.
> The 11/23 is a measly crippled PDP-11 (well, not really, but it lacks some
> features that 2.11 require). More specifically, 2.11BSD requires split I/D
> space and supervisor mode.

Of course it is worth looking inside the box, to see whether some
previous owner upgraded the CPU to an 11/73.

    carl
-- 
        carl lowenstein         marine physical lab     u.c. san diego
                                                  clowenstein@ucsd.edu