[Simh] 8-bit pseudocolor on modern Windows PC?

[Tom Morris]

Looks like we already discussed this a few years ago and someone had
actually started a QDSS emulator.

http://mailman.trailing-edge.com/pipermail/simh/2014-June/012922.html
http://9track.net/simh/video/

Not sure if they've made any progress since then, but I'd expect it to be a
pretty significant chunk of work.

Tom


On Wed, Jan 27, 2016 at 3:08 PM, Paul Koning <paulkoning at comcast.net> wrote:

>
> > On Jan 27, 2016, at 3:01 PM, Tom Morris <tfmorris at gmail.com> wrote:
> >
> > On Wed, Jan 27, 2016 at 2:39 PM, Paul Koning <paulkoning at comcast.net>
> wrote:
> >
> > ...
> > 2. Handle 8 bit color, *including* updating the look of the display
> dynamically if entries in the color map are changed.  That would be
> harder.  You'd have to keep a backing store of the 8-bit data, and
> regenerate the truecolor image whenever the color map is changed.  Doable,
> but messy.
> >
> > Is #2 actually important in practice?
> >
> > Yes.  That's how the X Window System works.  Apps can use the color map
> for animation and other effects.
>
> Ok, makes sense.
>
> > I can't imagine doing SIMH emulation of the QDSS/Drag-on chip would be a
> productive use of time.  An implementation of PseudoColor visuals on
> TrueColor displays in the XServer would be more widely useful.
>
> I wonder: doing it in XServer is the same thing as what I described for
> #2.  The only way to have it be simpler is with display hardware that has a
> color map, and it sounds like that's no longer done.  Maybe I'm confused...
>
> A Dragon chip emulation would enable running VAX display software.  X of
> course, but also VAXWindows if you're so inclined.
>
>         paul
>
>
>
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