[Coco] 6309

[Kip Koon]

Hi Tim,
Do you or any have any pdfs of Hitachi Databooks?  I'd like to check them out.


Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/User:Computerdoc


-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of tim lindner
Sent: Monday, March 27, 2017 3:54 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] 6309

On Mon, Mar 27, 2017 at 11:49 AM, Gene Heskett <gheskett at shentel.net> wrote:
> He did say that they did not get any masks, only permission to do a 
> cmos version clone, so their version was microcoded using their own 
> layout tools. They created a clone of the 6809 per the license, but 
> the opcode map, using their layout tools had some empty slots left. 
> And that was as close as he ever came to saying they "filled in the 
> blanks".  So like everybody else has assumed, the license prevented 
> publicly admitting to an "improved" version.

I noticed that the HD6300 (Hitachi's 6800 second source part) had additional instructions very much like the ones they added to the 6309. In the 6300 data manual they were fully documented. Not secret at all.

I can imagine (and have no sources to back this up) that Motorola was not pleased with this. They still needed a second source the 6809 and modified their contract to specifically exclude any changes from the spec.

But Hitachi did it anyway.

--
--
tim lindner

"Proper User Policy apparently means Simon Says."

--
Coco mailing list
Coco at maltedmedia.com
https://pairlist5.pair.net/mailman/listinfo/coco