Re: Apple][VGA - finally available

[James Littlejohn <narguthru@yahoo.com>]

On Jul 3, 2:21 pm, "Ferdinan Meyer-hermann" <ferdinan.meyer-
herm...@a2central.com.remove-wws-this> wrote:
>   To: Immortal Nephi
>   Re: Re: Apple][VGA - finally available
>   By: Immortal Nephi to comp.sys.apple2 on Thu Jul 03 2008 12:47 pm
>
> I'll answer both questions in a single message:
> Yes, the a2vga needs an adapter to grab signals from the AUX slot. But there is
> not going to be a clearance problem, because the 80-col card still sits in the
> connector where it used to be. The adapter surrounds the card and sits on the
> other side of the slot's contacts. I can't make you a photo, because I just
> sent the only adapter I have to Henry Courbis, who will present the card on
> KansasFest.
>
> You can't compare the Mega II chip and the Apple][VGA, because the decoding
> done on the Apple][VGA is just a copy of an NTSC TV's color decoder. It is
> analog circuitry! The decoder is somewhat reduced, because, for example, there
> is no need to recover COLOR REFERENCE from the signal because it is already
> present. A similar circuit is used in the PAL color card and the PAL Apple //e
> to partially decode the NTSC signal so that it can be encoded to PAL again.
>
> About the schematics: I published them in the "manual" on the web page.
>
> Ferdinand Meyer-Hermann

All Hail Ferdinand ! < Hazah >