You're aware there's an emulator of sorts already in progress? http://rottedbits.blogspot.co.uk/2013/05/imlac-emulator-progress.html
// Christian On 11 April 2015 at 23:20, Alan Frisbie <[email protected]> wrote: > I am only just getting started with SIMH, so perhaps I'm getting > a bit ahead of myself, but here goes... > > A classic graphics system of the early 1970s was the Imlac PDS-1. > The display was a vector-stroke type, driven by a display list in > memory and continuously refreshed. It had a CPU for > communicating with a host (typically a PDP-10) and local > calculations, and a GPU (Graphics Processing Unit) for executing > the elements of the graphics display list, both running out of > the same memory. Peripherals were generally limited to a serial > line, the light pen, and a single switch (often a foot switch). > > The CPU looked very much like a 16-bit PDP-8, which should be > almost trivial to simulate. The GPU would be a bit trickier, > as it would have to draw lines on the host's display. The real > problem, as I see it, would be how to have *two* simulated > computers operating simultaneously from the same memory. I seem > to recall a discussion on this list about how that would be > difficult, but can't recall the details. > > Does anyone have any ideas on how this might be done? > > I would be interested in doing it, as I just happen to have an > Imlac PDS-1D here, and would like have a simulator before I sell > the actual unit. I also have a complete set of documentation > with all schematics, plus some software. > > > A second system of interest is the CDC 6600. Again, the problem > as I see it is combination of a CPU and multiple PPUs (Peripheral > Processing Units). It also used ones-complement arithmetic, > which might cause difficulties. Does anyone have any thoughts > on these matters? > > Alan Frisbie > _______________________________________________ > Simh mailing list > [email protected] > http://mailman.trailing-edge.com/mailman/listinfo/simh
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