[Coco] Message from John of gimechip.com

Darren A mechacoco at gmail.com
Sat Jun 12 13:45:14 EDT 2010


On 6/12/10, Allen Huffman wrote:
> 65495 speeds up ROM and 65497 speeds up RAM. Since CoCo 3 copies ROM to RAM
> then runs out of RAM the first poke appears to do nothing but I expect it
> might if running ROM code?
>
> At least that's how I remember it from twenty years ago ;)
>
> -

That's only true for the CoCo 1 and 2.  65495 sets the "Address
Dependent" mode of the SAM. The GIME does not implement that mode at
all.

The CoCo 3 MESS emulation is flawed in that respect. The last time I
poked 65495 in that emulator it did speed up. A real CoCo 3 does not.

Darren



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