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

Glen Hewlett glen.hewlett at sympatico.ca
Thu Dec 29 10:37:47 EST 2016

> On Dec 29, 2016, at 7:09 AM, Mark McDougall <msmcdoug at iinet.net.au> wrote:
> On 29/12/2016 2:54 AM, Glen Hewlett wrote:
>> 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…
> I think someone had (Z80) CP/M running on the Coco3 a while back... haven't heard much more about it lately.
> The Apple II (software) is a good candidate for the Coco3 because of the similar graphics modes and - to a degree - CPU. Lode Runner translated fairly well to 6809 in the end…

Hi Mark,

Thank’s for that insight, it would be kind of neat to be able to have translated versions that you could run on the CoCo 3 of the original three, the Apple II, TRS-80 Model I, and the Commodore PET.  The PET is the first PC I ever used and it is special to me in that regard.  My older brother was allowed to take the PET home for weekends from his high school and I was blown away by the magic box and from then on I was hooked.  I think it was that summer we got the CoCo.  At some point the PET will probably be the one I’ll try to get translated first (If I can that is).  Space Invaders was a really good experience for me, I’ve started to look at Pac Man now and the full Z80 Instruction set has quite a few more instructions than the 8080 so I think I’m going to be fighting with this for a while not only that but the graphics hardware is sprite based (something else to learn)...


> Regards,
> -- 
> Mark McDougall
> <http://retroports.blogspot.com.au>
> -- 
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