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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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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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Post Posted: Mon Jan 27, 2020 1:19 am
Does anyone know if these were put up for sale? The link above suggests that there were some bugs so it was never made for sale.

I wish Norix would make his boards for sale or at least open source the design if he's not supporting them anymore. He makes really awesome stuff.

I'd be happy to produce some of his boards or do the necessary PCB design work if anyone wanted to put me in touch with him.
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