[sdiy] Multiplexing (Atari video out)

[Hallvard Tangeraas]

On 20-06-07 19:23, dj hohum wrote:
> I suspect that few, if anyone, here is all that familiar with Atari
> internals. You might try in a specialized Atari forum. 
Yes, I've tried that several times.
The problem is finding people who are into Atari ST computer and have 
knowledge in electronics.
However, the Atari ST specific issues have already been sorted out, so 
this has really nothing to do with that.
The things I need help with have to do with general electronics.

I've already managed to create a block diagram on my own, but I don't 
know which IC(s) to use and how to connect them together to make it work 
like I need them to.
It's all about AND/OR/YES/NO type electronics based upon the status of 
two physical switches and a logic high/low signal.
I've drawn all of this as "logic boxes" in my otherwise schematic diagram:
http://img405.imageshack.us/img405/3559/vga19bv6.png

It's the coloured boxes on the left hand side.
Does any of this make any sense to anyone?


In the meantime I'll look around some more for suitable forums. I've 
already received a few suggestions.


Hallvard