Re: Apple //e RGB Card to CGA pinout?

[Knut Roll-Lund <kr-lund@nogarbage.online.no>]

Bill Garber wrote:
> "Knut Roll-Lund" <kr-lund@nogarbage.online.no> wrote in message 
> z9OdnfhWpN7c-b3eRVnzvA@telenor.com">news:z9OdnfhWpN7c-b3eRVnzvA@telenor.com...
>
> > Mark McDougall wrote:
> >
> >
> > > Bill Garber wrote:
> > >
> > >
> > > > IIRC, CGA monitors accept Composite Sync on the Horizontal Sync pin.
> > > > I'd have to research it again to be sure. Been a long time.
> > >
> > >
> > > Yeah, that's exactly what I was thinking when I first read the post... so 
> > > ditto from me.
> >
> > I will try it... the CGA monitor too then and report back my result. The 
> > Mitsubishi is like that, it can use composite sync on the same terminal 
> > which is Horizontal when using separated syncs.
> >
> > I read in the Mitsubishi manual that it should be possible to have the 
> > syncs composite on the green input too, but that doesn't work because then 
> > the normal monocrome video output should work on the green input. It just 
> > swims no sync.
>
>
>
> Well, you can't just attach the sync signal to the green,
> it has to be incorporated digitally.
It wasn't the sync, it was mono composite video.

And, yes I know, and probably not just digitally, it is also a special 
level. I'm not sure but I though a normal mono composite video would be 
similar to what that green+sync input expects. It might of course be 
different so that is why it didn't work. Applying this mono composite 
signal to the blue or red inputs would produce exactly the same result.

I have the RGB card now so I'll soon be back with some more test results 
(it at least works as a normal 80columns 128k card...)

Knut