[Coco] Latest fixed copy of MacMAME

[Guillaume Major]

You are right. Support for headerless .os9 disk format was dropped in MAME 
0.163. Tim Lindner added support for JVC header in MAME 0.187. So in MAME 
0.186, I get an "Invalid disk image" error when trying to open a SQ1 disk 
with a JVC header. SQ1 and SQ2 with a JCV header lock up in MAME 0.187 and 
up.


Support for headerless OS-9 disk images was added back in MAME 0.189 (no 
need to rename the disk to .os9) but I get the same result with a headerless 
SQ1 disk. However, if I hit enter before the disk stop spinning (you can now 
hear it in the emulator), I get to the login screen and the first room. But 
as soon as I go into another room the game locks up.


I'm surprised that you can open disks with a JVC header with your version of 
MAME as it was not implemented yet. Did you apply any custom patches to your 
version?

Guillaume

"Barry Nelson" 
<barry.nelson at amobiledevice.com> wrote in 
message news:64BBD86D-C893-4975-B332-504C30D16AD7 at amobiledevice.com...
>> Guillaume Major
>> Thu Oct 19 17:56:39 EDT 2017
>>
>> Thanks Barry!
>>
>> I think there might still be an issue with the floppy drinve in the 
>> latest
>> version of MAME. Space Quest 1 and Space Quest 2 doesn't seem to work
>> anymore. I'm using MAME 0.189. Both games boot fine in NitrOS-9 but they
>> lock up right after the title screen. I have tested the disk images on 
>> real
>> hardware and VCC and they work as expected. The becker port version works
>> fine in MAME so it looks like a floppy drive emulation issue.
>>
>> Can anyone confirm this bug?
>>
>> You can get Space Quest 1 and 2 from the Color Computer Archive if you 
>> don't
>> already have them:
>> http://www.colorcomputerarchive.com/search?q=space+quest 
>> <http://www.colorcomputerarchive.com/search?q=space+quest>
>>
>> Thanks,
>> Guillaume
> It looks like those disks are missing the JVC header bytes. I added two 
> bytes, $12 $02, to the beginning of the images for Space Quest 1 and they 
> now work with MacMAME 0.186 patch 2. I will test the new disk images with 
> VCC and a physical CoCo and send them to the archive if they work as 
> expected. I believe MAME no longer supports the headerless .os9 disk 
> format. I have not compiled MAME version 0.189 yet, so I do not know if 
> that has another issue or not.
>
>
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