[Coco] 6309 microprocessor project 01-16-2004

[John Collyer]

I just talking didn't mean to cause alarm.

A&B could still equal the lower 16-BITS of D.
E&F could still equal the lower 16-BITS of W.
Q could still equal D&W, but the lower 32-BITS of Q.

But this is just talk.  I have not the resources or time to
make a coco (4) whatever.

I have never seen any PDP-11 or SPARC assembly language,
but I have seen m68k and I can honestly say it didn't appeal to me.
I can honestly say I'd rather use 80x86 assembly language then m68k.

Johh Collyer

----- Original Message ----- 
From: "Theodore (Alex) Evans" <alxevans at concentric.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Saturday, January 17, 2004 3:25 PM
Subject: Re: [Coco] 6309 microprocessor project 01-16-2004


> 
> On Jan 17, 2004, at 4:34 AM, John Collyer wrote:
> 
> > I know I seen someone suggest that the coco (4?)
> > whatever should use a 32-bit program counter
> > and extend the registers all to 32-bit.  I think that
> > would be nice!  One of the main reasons I like the
> > coco (4?) whatever is because of the 6809 assembly
> > language.  I haven't found any other assembly language
> > that even comes close to being so nice as the 6809.
> 
> Do we want to try to be code compatible?  I see all kinds of 
> complications arising out of this.  For instance D being A&B (and if we 
> go from the 6309 W being D&E).  If you don't can think of a number of 
> nicer assembly languages (m68k, PDP-11, and SPARC come immediately to 
> mind).  A couple more registers would be a big improvement (one of the 
> nice features of the 6309 extentions).
> 
> 
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