[Coco] (Probably stupid and newbie-ish) CoCo hardware question

[Bruce W. Calkins]

The original CoCo 1s were in one way or another capable of using all 64k of 
the standard 64k chips.  Some of the earlier ones has a switch (jumpers) for 
selecting the top half or bottom half as the addressable portion addressed 
by basic as a nod toward "half-good" 64k chips that never did gain any 
significant market share.  Using the full 64k was a relatively simple matter 
of wiring in an unused gate on a 74LS02.  By the last version of the CoCo 1 
and all CoCo2s the addressing for use of the full 64k was in place.



Short answer; in all probability a 32k CoCo 1 or 2 is actually a 64k CoCo. 
There is a program to test for 64k addressing out there somewhere.



Bruce W.



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----- Original Message ----- 

From: "Juan Castro"

> Let's say you have a CoCo 1 or 2 with 32 KB RAM.
>
> Is it possible to provide the standard additional 32 KB through a
> cartridge? Or do I necessarily have to open it up and put the DRAMs 
> inside?
>
> Juan