FPGA PDP-11 - test-drb@ccmp.vtda.org

30 Sep 2005

On Thu, 29 Sep 2005 cctalk-request at classiccmp.org wrote:

...
  Date: Thu, 29 Sep 2005 20:14:44 -0400
 From: Douglas Taylor <dj.taylor at starpower.net>
 Subject: FPGA PDP-11
 Message-ID: <6.0.1.1.0.20050929201244.01bde3b0 at pop.starpower.net>

 I found this interesting bit of work on the web, it is a college project to
 create a PDP-11 on a chip; look at the link:

 http://shimizu-lab.dt.u-tokai.ac.jp/pop11.html

 Why did he pick PDP-11/40 model? 
Probably because it's a fairly simple and straight PDP-11, having more or
less the clean original design combined with an MMU, without any of the
later tricky stuff that would cause lots of more problems.

...
  Date: Thu, 29 Sep 2005 17:42:51 -0700 (PDT)
 From: Vintage Computer Festival <vcf at siconic.com>
 Subject: Re: FPGA PDP-11
 Message-ID: <Pine.LNX.4.33.0509291742360.29998-100000 at siconic.com>

 On Thu, 29 Sep 2005, Douglas Taylor wrote:

  I found this interesting bit of work on the web,
it is a college project to
 create a PDP-11 on a chip; look at the link:

 http://shimizu-lab.dt.u-tokai.ac.jp/pop11.html

 Why did he pick PDP-11/40 model? 
 Maybe because that's what they had in their lab? 
Could be.

...
  Date: Thu, 29 Sep 2005 18:04:01 -0700
 From: "Zane H. Healy" <healyzh at aracnet.com>
 Subject: Re: FPGA PDP-11
 Message-ID: &lt;a06200700bf623e5719c4(a)[192.168.1.199]&gt;

 At 8:14 PM -0400 9/29/05, Douglas Taylor wrote:
 I found this interesting bit of work on the web,
it is a college
project to create a PDP-11 on a chip; look at the link:

http://shimizu-lab.dt.u-tokai.ac.jp/pop11.html

Why did he pick PDP-11/40 model?

Doug 
 It's worth noting that they're also working on a VAX-11/780 implementation.

 http://shimizu-lab.dt.u-tokai.ac.jp/ 
Yikes! If they would pull that off, it would be interesting... I wonder
how feasible it is, though.

...
  It's interesting to note, based on the pictures,
they might be
 emulating RK05's using the IDE HD.  As such it might possible to run
 something other than Unix on this. 
Hmm... 11/40 and RK05... The theory about 6ed Unix don't sound that far
fetched...

...
  Date: Thu, 29 Sep 2005 22:04:45 -0400
 From: Allison <ajp166 at bellatlantic.net>
 Subject: Re: FPGA PDP-11
 Message-ID: <0INL0011FXOYKNC1 at vms046.mailsrvcs.net>

Subject: FPGA PDP-11
   From: Douglas Taylor <dj.taylor at starpower.net>
   Date: Thu, 29 Sep 2005 20:14:44 -0400
     To: cctech at classiccmp.org

I found this interesting bit of work on the web, it is a college project to
create a PDP-11 on a chip; look at the link:

http://shimizu-lab.dt.u-tokai.ac.jp/pop11.html

Why did he pick PDP-11/40 model? 
 It was one of the higher performing models. whats significant is the
 IDE, serial as well as MMU were included. 
Um. No, actually the 11/40 is pretty low performance. It's basically a 2nd
generation PDP-11. EIS was still very optional, and usually not included.
You have 18-bit mode, but no split I&D space, no supervisor mode or
anything else fancy. Also, no FPP available. You did have the FIS option,
though.

Might you be thinking of the 11/45 with variations?

...
  However I prefer my DEC310s (40pin dip LSI-11).

:-)

...
  Date: Thu, 29 Sep 2005 23:25:32 -0400
 From: 9000 VAX <vax9000 at gmail.com>
 Subject: Re: FPGA PDP-11
 Message-ID:
 	<ddc584f50509292025v593427b2t7687221d298a7b78 at mail.gmail.com>

 On 9/29/05, Douglas Taylor <dj.taylor at starpower.net> wrote:
  I found this interesting bit of work on the web,
it is a college project to
 create a PDP-11 on a chip; look at the link:

 http://shimizu-lab.dt.u-tokai.ac.jp/pop11.html

 Why did he pick PDP-11/40 model? 
 I probably know why they chose PDP-11/40, because I chose PDP-11/40
 before I found their work. The reason why I chose PDP-11/40 is because
 UNIX V6 runs on PDP-11/40 and there is a very good book about the UNIX
 V6 source code hacking (written by an Australian I believe). Sure, I
 abandoned the plan to create a PDP-11/40 to focus on other projects. 
Good point. Having something to run on the hardware is desireable.

	Johnny

Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: bqt at update.uu.se           ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol