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GGMSX Adapter
Post Posted: Mon May 25, 2015 11:07 pm
Plays MSX1 cartridges on Game Gear (!)

https://twitter.com/MtChocolate/status/602501914723360769/photo/1
https://twitter.com/oz_shiron/status/602482917340680192/photo/1
https://twitter.com/TheJam08/status/602362968974626816/photo/1


(
Looks like there's a bunch of stuff happening in Japan lately (between @naska88va2 @norix_v and @sions_papa some of the other recent things:
http://www.smspower.org/forums/15524-LCDTFTForGameGear
http://www.smspower.org/forums/15527-GradiusHomebrewSegaMarkIIIMasterSystemVersi...
http://www.smspower.org/forums/15413-FMMarkConverterFMAdapterForGameGearSGColorA...
)
CFyETE1UsAA-DxQ.jpg (60.81 KB)
CFyETE1UsAA-DxQ.jpg
CFxy-8BUsAAV5JN.jpg (47.26 KB)
CFxy-8BUsAAV5JN.jpg
CFwF6xKUIAAJkxz.jpg (30.58 KB)
CFwF6xKUIAAJkxz.jpg

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Post Posted: Mon May 25, 2015 11:19 pm
Here's a picture of the adapter
https://twitter.com/naska88va2/status/601232118002241536
jqKsH.jpg (1.14 MB)
jqKsH.jpg

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Post Posted: Tue May 26, 2015 5:22 am
This is beyond awesome :D Wow. *stunning*
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Post Posted: Tue May 26, 2015 7:34 am
Remarkable! Would love to hear the technical details of how this is achieved.
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Post Posted: Tue May 26, 2015 8:16 am
I guess you could put RAM and ROM in the right place and remap port reads and writes, but it still seems like it would be incredibly tough compared to a software process.
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Post Posted: Tue May 26, 2015 9:26 am
There is an Atmel MCU on the board, that is likely doing the IO related work
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Post Posted: Tue May 26, 2015 4:08 pm
I wonder how they managed to get the full MSX resolution on screen.
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Post Posted: Tue May 26, 2015 8:03 pm
I guess the same way GG handles SMS games (scaling)
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Post Posted: Wed May 27, 2015 6:13 am
I'm curious what is involved to play msx1 carts, I'd love to add msx1 cart-game support to a sms emulator :)
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Post Posted: Wed May 27, 2015 7:01 am
MSX1 is rather easy to emulate if you have SG-1000 emulation in already, it's basically similar base hardware with different a memory map and port map, a few different features. It's quite more involved more to create an adapter that can do this remapping. Note that later MSX1 games are pushing the hardware more than any SG-1000 game ever did, which may exhibit emulation issues.
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Post Posted: Wed May 27, 2015 12:54 pm
Thanks Bock,
I have sg1000 support already, and learned that msx1 reads the joystick through the ay8910's ports - the memory map seems a bit daunting though :/
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Post Posted: Mon Jun 01, 2015 9:29 pm
This is impressive. Would it work on the Master System?
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Manual
Post Posted: Sat Jul 04, 2015 3:30 pm
For reference here's the manual:
http://www.2a03.jp/~norix/ggmsx/index.html
It looks like the GG needs to be modified.
GGMSX_manual.pdf (1.13 MB)

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  • Joined: 11 Jul 2014
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I tried using GGMSX
Post Posted: Tue Jul 07, 2015 1:53 pm
I tried to use it to buy because GGMSX that had been previously introduced were produced in small amounts. MSX1 you do not run for only part of the game , compatibility with equipped with game gear the GGLCD 's perfect !

http://sions-papa.blogspot.jp/2015/07/nxmsxggmsx.html

Sorry for the dub English
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