[Coco] MESS CoCo Emulation

[Pete Rittwage]

As far as I am aware, it's a straight cart dump.  That would make sense,
though. Perhaps MESS doesn't protect the cart area from writing, although
I can't believe that would be such a big oversight...

-Pete


On Tue, January 15, 2013 2:16 am, Arthur Flexser wrote:
> Some cartridge games were protected from running from a RAM copy
> transferred to the cartridge ROM area.  Does MESS simulate running the
> cartridge from ROM, not from a RAM copy?  Canyon Climber, if I'm
> remembering right, was written by Steve Bjork, who in his later
> cartridge games put heavy protection to keep them from running from
> RAM.  (Or does "verified cartridge image in CCC format" mean the
> protection has already been removed?)
>
> Art
>
> On Mon, Jan 14, 2013 at 12:44 PM, Pete Rittwage <peter at rittwage.com>
> wrote:
>> Thanks very much-
>>
>> I used a "verified" cartridge image in "CCC" format and attached it to
>> regular CoCo emulation.  The screen appears briefly, then scrambles and
>> locks up.  In the other emulations (CoCo2/3) the cartridge image doesn't
>> boot at all, it is ignored.
>>
>> I haven't tried loading a disk version- I will find one and try that for
>> comparison.
>>
>> I am using messui, but I thought I had similar behavior under plain
>> mess.
>> I will try again.
>>
>> It's probably not OK to attach the cart image here?  I can post the hash
>> of it for verification. I know I've played the game probably a year ago
>> or
>> so.
>>
>> -Pete
>>
>> On Sun, January 13, 2013 7:35 pm, Robert Gault wrote:
>>> Robert Gault wrote:
>>>> Pete Rittwage wrote:
>>>>> Is this broken for anyone else?
>>>>>
>>>>> I used to be able to play old CoCo games under MESS with no problem.
>>>>> Today,
>>>>> I fired up Canyon Climber and the screen just goes crazy.  Many other
>>>>> games crash before the title screen.
>>>>>
>>>>> I'm not sure what the last version it worked was... I went from 0.148
>>>>> back
>>>>> down to 0.145 and all were broken.  There is nothing in the
>>>>> MameTesters
>>>>> bug section, so I figured maybe I have some issue nobody else is
>>>>> having?
>>>>>
>>>>> What is the last version to work, or is it just my setup?
>>>>>
>>>>> -Pete Rittwage
>>>>>
>>>>
>>>> You will need to supply much more information to get a useful answer.
>>>>
>>>> 1) Which MESS, mess.exe or messui.exe?
>>>> 2) URL for a test game, Canyon Climber or other. Are these tape or
>>>> disk?
>>>> 3) Settings used in MESS regards video, memory, disk access, etc.
>>>> 4) Which emulation?
>>>> 5) Anything else that might be relevant.
>>>>
>>>>
>>>
>>> To continue:
>>> I found Canyon Climber on disk and tested it with MESS 0.148.
>>>
>>> CC needs to be LOADMed and then EXECed to start. It will not work with
>>> Coco3
>>> emulation on any MESS version I've tried. It works perfectly with MESS
>>> 0.148
>>> when the emulation is cocoe, coco2, or coco2b.
>>>
>>> Pete, you had better make sure if games can work on a Coco3 as many old
>>> games
>>> will not.
>>>
>>> Robert
>>>
>>>
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>>
>>
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