[Coco] Kicking the Z-80 butts...

[Dave Philipsen]

Yes, the ability to write position independent code is very nice. The 
6809 can use PC counter relative addressing and branches as well as long 
branches which are also relative.  This is something that is practically 
impossible to do with the 6502 and other 8-bitters.  I learned assembler 
on my 4K CoCo 1.  When I had to write code for Z-80, 6502 and even 
68HC11 (6801) later it was like trying to walk with one leg!

Dave Philipsen


On 4/28/2015 2:05 PM, Joe Grubbs wrote:
> 6809 really is amazing. I learned on Sunday night from Kip and William that the 6809 was originally designed with multiprocessing in mind, hence another use for the external clock pin of the E version. Kip has the schematics for a multi processor 6809 computer in fact
>
>
> --- Original Message ---
>
> From: "Gustavo Ranaur Schoenaker" <ranaur at ranaur.net>
> Sent: April 28, 2015 2:29 PM
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Subject: Re: [Coco] Kicking the Z-80 butts...
>
> Really amazing.
>
> The more I know the 6809 the more I think the problem with the chip was no
> t the processos, but the 6847. Maybe it was the reason Tandy made the GIME
> chip on CoCo 3. Video is really the upper limit of the plataform. At those
> times the video chip make a huge difference.
>
> Nice job Luis!
>
>
> On Tue, Apr 28, 2015 at 2:34 PM, Gene Heskett <gheskett at wdtv.com> wrote:
>
>> On Tuesday 28 April 2015 09:35:20 Mathieu Chouinard wrote:
>>> speaking of wordstar
>>> I found this last night:
>>> http://wordtsar.ca/
>> Interesting, for wordstar fans.  I've never used it, dynastar yes.
>>> On Tue, Apr 28, 2015 at 9:24 AM, CoCo Demus <retrocanada76 at gmail.com>
>> wrote:
>>>> That's why MC6809 is the king of 8-bit processors:
>>>>
>>>> https://youtu.be/Ysn7Na60ZGA
>> Thats plumb amazing.
>> [...]
>> Cheers, Gene Heskett
>> --
>> "There are four boxes to be used in defense of liberty:
>>   soap, ballot, jury, and ammo. Please use in that order."
>> -Ed Howdershelt (Author)
>> Genes Web page <http://geneslinuxbox.net:6309/gene>
>>
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