Re: How does the apple2 RGB card work?

["mdj" <mdj.mdj@gmail.com>]

Michael J. Mahon wrote:
> mdj wrote:
> > For years I've considered the idea of hacking an Apple Colour Composite
> > display to provide an RGB 'input' by feeding analog RGB signals
> > directly to the amplifier board in the monitor, and leaving the
> > composite input connected to provide 'sync', but my knowledge of video
> > electronics is rather limited, and I'm not sure if this approach would
> > work. It seems fine in theory though, and would actually give me the
> > exact setup I've always wished for.
>
> It should work fine--especially since you have 5v RGBI signals to work
> with!
>
> (Hmmm.  Thinking about the "I" input, I may see what the zeners were
> for...)

Yeah, I've now gotten rid of all but one of them, and am a bit reticent
to modify it... I thought it might provide a possible solution for
those in 50Hz markets wanting RGB output.

Matt