PDP11/23 More dumb questions

From: Aaron Christopher Finney <af-list_at_wfi-inc.com>
Date: Wed Mar 29 09:48:48 2000

I've partially completed the scans of the MicroPDP/11 Technical
Manual (no link page or Acrobat files yet) that you can find at:

www.retrobytes.org/docs/dec/uPDPtm

in TIFF format only. It probably has a lot of information that would be
useful for you at this time...

Cheers,

Aaron


On Thu, 30 Mar 2000, Olminkhof wrote:

> Well . . . after another few more hours of exploration :
>
> The M8059 YA card wasn't that at all. It is actually an M8639 YA.
> I need glasses . . and stronger light.
>
> Anyway, Control C doesn't work and I can no longer repeat getting to an _at_
> prompt, instead getting a lot of backward ? characters at times.
> I'm now using the console port but have lost confidence in the terminal and
> serial cable completely. I discovered the baud setting control for the ports
> after I blew the dust out of the little window. Set the port to 4800 baud,
> the default setting on the VT220. All for no consistent result. Tried 110
> baud on both with no result
>
> I switched to a straight though 25 wire serial cable and got absolutely no
> communication, . . added a null modem and got a little garbage . . changed
> from the default VT200 mode 7 bit controls to some of the others . . . all
> to no result.
>
> I think the PDP is booting OK judging by the sounds it makes but there is
> nothing on the terminal screen. The terminal seems to do everything OK when
> in local mode.
>
> I have another VT220 tucked away. Trying that is all I can think of at this
> point. I should see something on the screen even if the hard drive or OS
> have a problem shouldn't I?
>
> Is there a PDP11's for Dummies book?
>
> Hans
>
>
> -----Original Message-----
> From: Pete Turnbull <pete_at_dunnington.u-net.com>
> To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
> Date: Wednesday, 29 March 2000 17:45
> Subject: Re: PDP11/23 More dumb questions
>
>
> >On Mar 28, 15:25, CLASSICCMP_at_trailing-edge.com wrote:
> >> >> >M7195
> >> >>
> >> >> 128 kbyte RAM
> >>
> >> >It's actually a MXV11-B Multifunction card, with 128KB RAM, and ...
> >>
> >> >> It's also particularly confusing, because you evidently have no serial
> >> >> line cards nor disk controllers in the backplane. I have no idea
> >> >> how you even got the ODT prompt out of the machine.
> >>
> >> >... the MXV11-B has two SLUs, of the same type as a DLV11.
> >>
> >> Yeah, that makes more sense. I still don't know how his machine is
> >> supposed to boot from disk without a disk controller, though!
> >
> >Ah, that's the magic part :-)
> >
> >--
> >
> >Pete Peter Turnbull
> > Dept. of Computer Science
> > University of York
> >
>
Received on Wed Mar 29 2000 - 09:48:48 BST