[Coco] OS-9 80-column driver is ready

[Luis Antoniosi (CoCoDemus)]

It outputs a monochrome composite signal, like the Apple IIe 80 column
output.

If you feed your s-video luminance input with it you will have it as
s-video.

Didn't you see my video ? I fed my RGB green input with it. Perfect crisp
image and green :)


On Tue, Oct 8, 2013 at 5:11 PM, Tormod Volden <lists.tormod at gmail.com>wrote:

> On Tue, Oct 8, 2013 at 10:52 PM, Luis Antoniosi (CoCoDemus) wrote:
> > The chip runs on +5V so I don't think it will burn anything here :). It
>
> A 5V output is enough to destroy an output on your CPU if they are
> connected and driven at the same time.
>
> > needs data strobe to work something more complicated to test without a
> > clock.
> >
> > I already have the schematics and PCB done on Eagle cad.
> >
> > The free edition size limitation is enough for a small pak PCB. But I
> will
> > prototype it on a breadboard to make sure it works before going to
> > production. Just waiting all my chinese crap to come...
>
> They are slow these days in my experience... National day holidays.
>
> >
> > The original prototype has some of the data bit traces inverted between
> the
> > CRT and SRAM according to the datasheet.
> >
> > They made that way to reduce the number of vias. It's okay since the CRT
> is
> > the only to read and write on it so the bytes will always be in the
> correct
> > order.
> >
> > But since I'm more pragmatic (OCD ?) I routed them the way they are on
> the
> > datasheet.
>
> Would it be possible to get S-video out of this?
>
> Tormod
>
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>



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