[Coco] Bugs 2 FYI

[L. Curtis Boyle]

Just to let all of you know… I think I may have Bugs II patched to run properly on a 6309 (I also have changed the french text to english at the beginning, and added a hint on that screen as well). Going to be doing some testing on it later today (want to make sure the same image will now work on both 6809 and 6309, and both Coco 1/2 and Coco 3), and if everything goes well, I will be uploading the patched version to both Facebook and the Color Computer archive. If we discover problems, I will let you know.

L. Curtis Boyle
curtisboyle at sasktel.net

TRS-80 Color Computer Games website
http://www.lcurtisboyle.com/nitros9/coco_game_list.html

NitrOS-9 Ease of Use Project: 
http://www.lcurtisboyle.com/nitros9/nitros9.html <http://www.lcurtisboyle.com/nitros9/nitros9.html>



> On Dec 2, 2019, at 7:09 PM, Alex Evans <varmfskii at gmail.com> wrote:
> 
> Why do some programs for the CoCo have "illegal" opcodes? It isn't
> like any of the illegal opcodes on the 6809 actually do anything
> interesting.
> 
> On Mon, Dec 2, 2019 at 4:30 PM rietveld rietveld <rietveldh at hotmail.com> wrote:
>> 
>> You are right. I didn't even think about the fact that my 2mb coco3 s all have a 6309.
>> 
>> Sent from my BlackBerry
>>  Original Message
>> From: Robert Gault
>> Sent: Monday, December 2, 2019 4:25 PM
>> To: CoCoList for Color Computer Enthusiasts
>> Reply To: CoCoList for Color Computer Enthusiasts
>> Subject: Re: [Coco] Bugs 2 FYI
>> 
>> 
>> Michael,
>> 
>> You solved it! The problem is indeed the presence of a 6309 cpu.
>> 
>> I have one in my Coco3 and don't want to swap it back to a 6809 for testing. However with MESS,
>> selecting Coco3 emulation with 6809 or 6309 makes all the difference in whether MESS will run the
>> game or not.
>> 
>> So, and this has happened with other programs, some opcode in BUGS-II is illegal which does not
>> matter to the 6809 but does to the 6309.
>>