[Coco] other use for fpga rgb converter

[Chris Osborn]

On Oct 28, 2014, at 9:19 AM, Luis Antoniosi (CoCoDemus) <retrocanada76 at gmail.com> wrote:
> 
> I would need a help for any engineer with video expertise, how do I
> normalize different video voltages ?

I just use resistors. I standardized on using the IIgs pinout back when I was doing arcade PCB repair. Arcade boards use the same voltage levels. I either make a special PCB to convert other computers to the correct analog level, or more often, just stick resistors inside the cable that goes from the old computer to the DA-15 connector.

You can see some cables I’ve made here: 

  http://www.insentricity.com/a.cl/233/from-zed-to-zee

For the C128 I made a small PCB to convert the TTL CGA to analog levels:

  http://www.insentricity.com/a.cl/221/milling-the-pcb

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