[rescue] 6809 processors...

Paul paul at techcenter3000.com
Fri Nov 14 04:19:10 CST 2003

I seem to remember it was pre-emptive _capable_...and you _could_ set a
realtime priority no less...it was WAY ahead of it's time...

The newer OS/9 has some info @

The 16 bit registers were kinda cool...the 6809 was also supposedly the very
first CPU ever to have an official SEX op-code. ;)


----- Original Message ----- 
From: "Scott Newell" <newell at cei.net>
To: <rescue at sunhelp.org>
Sent: Thursday, November 13, 2003 9:09 PM
Subject: Re: [rescue] 6809 processors...

> At 09:01 PM 11/13/2003 -0600, Paul wrote:
> >6809's were nice. Hitachi (IIRC) came out with the 6309 which was a
> Hey, I forgot about that.  I've seen quite a few 6309s in load cell
> indicators.  Maybe I should repurpose/rescue one as a dev kit.
> >amazing in what you could do on a very cpu/ram/storage limited machine. A
> >multitasking GUI system in 64k? Yep. In case you're wondering, the
> >machine was the Radio Shack Color Computer. (The RS MC-10 used a 6803
> I was afraid the CoCos would come out if I mentioned the 6809.  ;-)  (And
> yes, I remember hanging out and being told by a Rat Shack guy that it even
> had on chip multiply...that was a big deal then!)  Did they really run a
> multitasking OS?  Was it preemptive?
> newell
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