Re: [Simh] The missing PDPs

On Wed, Aug 21, 2019 at 7:18 AM Pontus Pihlgren wrote: > On Wed, Aug 21, 2019 at 06:39:06AM -0600, Warren Young wrote: > > What I was really hoping for in asking the question is some old science > lab > > experiments based on the A/D converters that we could replicate in > > kitchen-table science

Re: [Simh] The missing PDPs

On Wed, Aug 21, 2019 at 06:39:06AM -0600, Warren Young wrote: > What I was really hoping for in asking the question is some old science lab > experiments based on the A/D converters that we could replicate in > kitchen-table science fashion. Something like this? http://www.pdp8online.com/images/l

Re: [Simh] The missing PDPs

On Wed, Aug 21, 2019 at 6:02 AM Pontus Pihlgren wrote: > On Tue, Aug 13, 2019 at 06:29:40AM +, Lars Brinkhoff wrote: > > Warren Young wrote: > > > Find some bit of PDP-5 and/or PDP-12 software that you want to make > > > run, then modify the current simulator until it does run. > > > > What i

Re: [Simh] The missing PDPs

On Tue, Aug 13, 2019 at 06:29:40AM +, Lars Brinkhoff wrote: > Warren Young wrote: > > Find some bit of PDP-5 and/or PDP-12 software that you want to make > > run, then modify the current simulator until it does run. > > What interesting PDP-5 and/or PDP-12 software is there? For the PDP-12 th

Re: [Simh] The missing PDPs

I think I am going to give it a try. I think am going to start with a Straight-8 simulator for proof of concept. Would this be worth releasing as well? Then I will start on the PDP-5. I hope there people that would willing to answer my questions and in the beginning there will probably be a lot!

Re: [Simh] The missing PDPs

> On Aug 12, 2019, at 10:17 PM, Johnny Billquist wrote: > > ... > The PDP-12 poses a more interesting problem, as it is a dual CPU thingy with > shared memory and two totally different instruction sets, but some > interaction between them... I've never programmed one but I have a handbook so

Re: [Simh] The missing PDPs

On 2019-08-13 07:55, Warren Young wrote: On Mon, Aug 12, 2019 at 8:17 PM Johnny Billquist > wrote: As far as I can remember, the changes needed compared to a PDP-8 is not much. PC is at address 0 instead of internal to the CPU, and interrupts then store the

Re: [Simh] The missing PDPs

Warren Young wrote: > Find some bit of PDP-5 and/or PDP-12 software that you want to make > run, then modify the current simulator until it does run. What interesting PDP-5 and/or PDP-12 software is there? Maybe also consider the original LINC models and the LINC-8 computer. http://www.bitsavers

Re: [Simh] The missing PDPs

On Mon, Aug 12, 2019 at 8:17 PM Johnny Billquist wrote: > As far as I can > remember, the changes needed compared to a PDP-8 is not much. PC is at > address 0 instead of internal to the CPU, and interrupts then store the > PC at 1, and start executing at 2. > All the rest of the CPU works the sam

Re: [Simh] The missing PDPs

On Mon, Aug 12, 2019 at 7:54 PM Ray Jewhurst wrote: > > Has any ever thought of writing simulators for the two missing systems, > the PDP-5 and the PDP-12? > Are you reacting to this recent post over on the PiDP-8/I list? https://groups.google.com/d/msg/pidp-8/1Rdv-Syg9H4/_KSeiGkmEgAJ If s

Re: [Simh] The missing PDPs

I'm almost surprised that the PDP-5 isn't already done. As far as I can remember, the changes needed compared to a PDP-8 is not much. PC is at address 0 instead of internal to the CPU, and interrupts then store the PC at 1, and start executing at 2. All the rest of the CPU works the same, as far

[Simh] The missing PDPs

Greetings, Has any ever thought of writing simulators for the two missing systems, the PDP-5 and the PDP-12? I know there is documentation for both on Bitsavers and software for the PDP-12 and I have seen some papertape labeled for both use on the PDP-5 and PDP-8. If I had the knowledge I would