[Coco] Space Invaders - Translated from Intel 8080 to Motorola 6809 for the CoCo 3

Glen Hewlett glen.hewlett at sympatico.ca
Wed Dec 28 10:54:36 EST 2016

Hi Guys,

I didn’t find out about Mark’s version until I was halfway finished my version.  I did this as a learning experience so it’s all good, I also supplied all my source code so if someone else wants to learn how to do this for similar hardware or just to learn from they can look through my code and maybe use the ‘C’ program to help translate 8080 or Z80 assembly to 6809 for other games.

Also someone can also use the source code to rotate the graphics so they can play it on a real CoCo

I was thinking that with a 6502 to 6809 translation that someone could port the Apple II or Pet to the CoCo 3.  Of course you couldn’t play any machine language games but you probably could run basic games made for those systems on the CoCo translated version.  I think that would be cool to see…


> On Dec 27, 2016, at 6:39 AM, Mark McDougall <msmcdoug at iinet.net.au> wrote:
> On 27/12/2016 5:02 PM, Nick Marentes wrote:
>> This has already been done by Mark McDougal. Go here to see all his
>> emulation conversions including Space Invaders for the CoCo.
>> http://retroports.blogspot.com.au/p/blog-page.html
> As Nick said. I was half-way through rotating it, changed tack for a bit, then decided to go back to my original plan, but yet to complete it. I have released the non-rotated version though on the link Nick provided above. Should play exactly like Glen's in theory...
> Regards,
> -- 
> Mark McDougall
> <http://retroports.blogspot.com.au>
> -- 
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