[Coco] Cryptic BASIC program

[Bruce W. Calkins]

Using the built-in ROMs a "64k" machine is only capable of using 32k of 
RAM.  The other 32k is idle until some program switches the ROMs off and 
the full RAM on.  There are a few machine language programs to use that 
RAM as fast storage, paged graphics or loading ROM to RAM, sometimes 
with modifications.  OS-9 (and NitrOS9) ignores the ROMs and uses the 
full 64k of RAM.
Bruce W.
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On 09/27/2015 06:55 PM, Salvador Garcia wrote:
Since I am master of misunderstanding this is entirely possible.
Then this program was only useful once to verify that the computer was 
set to 64K.
I did not have to run it every time I started the CoCo.
How were the 64K used? Or better said, how was the Ram used?
Since part of the address space went to the ROM(s) what happened to the 
RAM that was addressed in the same space os the ROM(s)?
Thanks, Salvador