[Simh] Emulated Graphics card?

[Michael Kerpan]

On Thu, May 12, 2011 at 4:25 AM, Jason Stevens <neozeed at gmail.com> wrote:
> A while ago I started taking the PDP-11 that'd been modified for
> graphics, and I managed to get it to start to ouput on SDL.. It's
> reasonably portable, but I didn't think there was any interest...
>
> http://dl.dropbox.com/u/1694005/simh302-sdl-display-0.c
>
> I think the pallet needed some work, and there was some weird timer
> thing where my SDL output ran too fast...?
>
> Maybe bringing up the original PDP-1 video to the 3.8 SIMH level first
> may be the ticket...

Indeed. Something like that might be an interesting proof of concept,
especially since the PDP-1 video system is probably better documented
than any of the VAXstation video cards. Still, figuring out an
abstraction layer for simple video would go a long way towards getting
a system that can eventually support more complex things like virtual
video cards for the VAX and S-100 simulators.

Mike