[Simh] PDP-12

[Bob Supnik]

Thanks for the simulator pointer, but no, I can't use it.

SimH is licensed under an MIT/X11/do-anything-you-damned-well-want Open 
Source license. Andreas' is using GPL v2, which is viral and 
contaminating. I don't want SimH entangled with GPL v2 or v3 components. 
The lesser or library GPL v2 license is fine.

Implementers of SimH need to be aware of the licensing model; I hope 
they are. From what I can tell, implementers in the GitHub repository 
have been reproducing the copyright/license headers from the original 
code, substituting their names, which is just fine.

/Bob

On 6/6/2015 2:51 AM, Pontus Pihlgren wrote:
> Hi
>
> As pointed out there is some online and Update has a stack of
> tape that we coul probably work to image. Mattis of
> www.datormuseum.se is working on a TU5X to usb interface with
> intention of archiving his 8 and 12 tapes.
>
> It would be great if Lyles tapes could be read.
>
> Also, Andreas Sandberg had made a somewhat working emulator
> _with_ graphics support for the PDP-12. Perhaps his code can be
> of some help:
>
> http://www.update.uu.se/projects/greenpea.php
>
> /P
>
> On Fri, Jun 05, 2015 at 09:54:10PM -0400, Bob Supnik wrote:
>> Al Kossow published a lot of new PDP-12 documents recently, so I
>> think there's enough to build a simulator. Now that SimH includes
>> graphics emulation, a PDP-12 emulator is practical, but it only
>> makes sense if software is available. Has anyone found the software
>> systems for the PDP-12? It will run OS/8 (probably), but I'm
>> thinking of its "native" software - DIAL and DEMO.
>>
>> There's nothing on Bitsavers except for paper-tapes. pdp8.org claims
>> to have some Linctapes, but they have not been transcribed. pdp8.net
>> is down (gone?). Any other sources? Because of differences in
>> encoding and bit ordering, it may take a running PDP-12 to read a
>> Linctape.
>>
>> The PDP-12 would be easier to emulate than the Linc-8, because the
>> 12 was one system that has two modes of operation, while the Linc-8
>> was actually two separate systems. Neither was a great success, but
>> SimH is getting to the fringes of the DEC world, like the PDP-15/76,
>> and not many of those experiments were solid commercial successes.
>>
>> /Bob Supnik
>>
>>
>>
>>
>>
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