[Coco] overdrive ...

jdaggett at gate.net jdaggett at gate.net
Sun Apr 24 23:10:31 EDT 2005

On 24 Apr 2005 at 14:26, Kevin Diggs wrote:

Date sent:      	Sun, 24 Apr 2005 14:26:47 -0700
From:           	Kevin Diggs <kevdig at hypersurf.com>
To:             	CoCoList for Color Computer Enthusiasts 
<coco at maltedmedia.com>
Subject:        	[Coco] overdrive ...
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> Mark & JDag,
>  Do you think I can crank an MC68008P8 to 14.31818 MHz? Otherwise I'll
> have to stick with 7.159 MHz.

Most likely not. The MC68008P8 is an 8 MHz rated part and may  
work to about 10 or 12 MHz with masive heat sinking.

>  Will wire wrap be problematic at these speeds?

If y ou take care yes at 8 MHz it should work. But y ou are pushing 
wire wrap to its limits if the parts are spaced to far apart. 
>  Anyone know how to keep a 14.31818 clock (or 7.159) synced to the
> cocobus clock (by synced I mean keeping the crossings lined up)? I
> think I want to do something similar to what the TV colorburst does.
> But how?
>      kevin

What are y ou trying to do with the MC68008P8 that requires 
syncing with the Coco clocks?


> P.S.:  What will happen if you enable the 6309 extensions (which also
> disables strict compatibility?) in a coco while it is running ROM?
> -- 
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