[Coco] [COCO] Stacking the 6309?

Salvador Garcia salvadorgarciav at yahoo.com
Fri Mar 31 11:57:24 EDT 2017

There is software that takes advantage of the 6309's enhanced features that are not available in the 6809. Additionally, some (all?) of the 6309's instructions are optimized, so they run a tad bit faster than in the 6809. If for no other reason, the 6309 can provide a slight speed boost. I've read here that a 10% increase in speed is realistic. Salvador

      From: Bruce W. Calkins <brucewcalkins at charter.net>
 To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
 Sent: Thursday, March 30, 2017 8:52 PM
 Subject: Re: [Coco] [COCO] Stacking the 6309?
Since the 6309 normally works like a 6809, why bother?

Bruce W.

On 03/30/2017 05:59 PM, S Klammer wrote:
> A while back, we had some discussion about using a ZIF type socket to allow
> swapping back to a straight 6809.
> Seems Chris Burke (of Burke & Burke) provided some instruction on just
> stacking the 6309 on top of the existing 6809, along with a switch...
> http://www.6809.org.uk/dragon/6309fit.shtml
> Shain

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