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

[Tormod Volden]

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