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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