Re: GEOS cartridge

Date: Tue, 18 Jun 2013 21:02:35 +0200
Message-ID: <>
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

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Received on 2013-06-18 20:00:30

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