Date   : Tue, 03 Mar 2009 07:29:06 +0000 (GMT)
From   : info@... (Sprow)
Subject: New Screen Modes with ARM7 Co-Processor?

In article <5tjoq4hejnrq8ds857vc1873c8mkin0qjl@...>,
   John Kortink <kortink@...> wrote:
> >I thought about something like that a while ago, Chrontel have a number of
> >frame buffer -> DVI on-a-chip parts that looked suitable.
>
> The most obvious choice is placing it behind the RGB
> output. This gives you a composite sync to unravel and
> does not give you the pixel clock. But that is too low
> anyway (looking@... Chrontel CH7301 and TI TFP410,
> both 25 MHz minimum), and I suppose you can just feed
> the RGB and oversample it by using a suitably high,
> independent clock.

Plus there's 5V on the RGB port isn't there?
I think I concluded it was a bit of a shame to have to turn the RGB+sync
back into a byte raster to feed the Chrontel.

Even more perverse than your 6502 adapter would be to replace the
(socketted) 6845 with a little carrier board. Problem is then any output
would need to flap around on a wire going out of the cooling vents: not
mechanically very satisfactory.

> No teletext though. 

Gah, I'd forgotten about teletext. OK so the video ULA would have to go too. 

> Or just buy one of those boxes that pretend to connect
> your 'retro' apparatus to a modern monitor and hope that
> it doesn't tear the signal to shreads ...

Well my TV card does a lame job of black level recovery, and aliases
horribly when resized, sigh,
Sprow.