Re: RGB-connection question???

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <3c7034$oh3@styx.uwa.edu.au>,
Joseph Turner <jturner@tartarus.uwa.edu.au> wrote:
>   Hello, I have a friend with an Apple 2c+. I asked me what the pin 
> configuration is,but I honestly have no idea. Is there anyone who help us 
> to determine the pin configuration? ANY help will be appreciated. 

First, I should correct a misconception: the video port on the back of
the IIc+ is _not_ an RGB port.  It is a video expansion port, which
provides all of the internal video generation signals used by the
IIc/IIc+ which can be used to generate an alternative video output signal.

To produce RGB output (or anything else) from this port, you need an
external adaptor box which generates the appropriate video signals.

I believe there is (or was) an RGB output adaptor for the IIc, which
should also work on the IIc+.

This adaptor is not simple: it has to decode the colour information
from the NTSC video signal (or generate it by detecting the graphics
mode and monitoring bit patterns), generate appropriate sync signals,
etc.
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand