Re: GEOS cartridge

From: Ruud_at_Baltissen.org
Date: Tue, 18 Jun 2013 21:02:35 +0200
Message-ID: <51C0AECB.32635.E9E0C1@Ruud.Baltissen.org>
Hallo Gerrit,


> Your cartridge does not use the R/_W signal though, ...

Indeed, just checked it for sure. 


> Unless I'm completly mistaken, you should be able to add R/_W
> to the mix with the 2 unused LS02 gates.

Just create an OR gate of those two NOR gates and use it to combine 
R/_W with IO1.
But I could think of a practical reason not to do that: it would be 
much more complicated to design the PCB. Just my two cents...


--
   
Kind regards / Met vriendelijke groet, Ruud Baltissen
www.Baltissen.org







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