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problem with 32M MGD2 DRAM card

 
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system64



Joined: 17 May 2009
Posts: 112

PostPosted: Wed Jul 01, 2009 9:58 pm    Post subject: problem with 32M MGD2 DRAM card Reply with quote

I bought a 32M DRAM card for my Multi Game Doctor 2 some time ago. I have DRAM adapters for the Super Famicom and Mega Drive. Unfortunately I have some problems with the 32M card.

When I use it with the MD adapter I have the following problems:
- games over 16M crash, show glitches or won't even start
- when I load several games into the slots, the games get corrupt when I switch to a different game.

On the SFC adapter I don't had any problems with the 32M card. I can load an play several games without any problems. I use Ucon to convert the games. The games work fine on an emulator.

I have a Mega Drive 1 PAL with 50/60Hz switch, region lockout switch and a selfmade rgb cable. My Super NES is also a PAL model with the necessary switches.

I already cleaned the connectors on the MD adapter. I also have a 2nd MD adapter which shows the same problems when used with the 32M card.

Does anyone know how to fix this problem? I would be pleased about help.
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Tomy
Site Admin


Joined: 02 Aug 2005
Posts: 414

PostPosted: Thu Jul 02, 2009 5:07 am    Post subject: Reply with quote

MD adapter need to modify to support over 16M games. So, your MD adapter is good because it can run 1-16M without problem.
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system64



Joined: 17 May 2009
Posts: 112

PostPosted: Thu Jul 02, 2009 5:48 pm    Post subject: Reply with quote

Tomy wrote:
MD adapter need to modify to support over 16M games. So, your MD adapter is good because it can run 1-16M without problem.


Thanks for your reply. How can I modify the MD adapter?
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RGB_Gamer



Joined: 01 Oct 2007
Posts: 879

PostPosted: Thu Jul 02, 2009 8:45 pm    Post subject: Reply with quote

system64 wrote:
Tomy wrote:
MD adapter need to modify to support over 16M games. So, your MD adapter is good because it can run 1-16M without problem.


Thanks for your reply. How can I modify the MD adapter?


I noticed mine has a 24mb/32mb switch. I am gonna crack it open and post pics of the PCB (if I can). I'll be interested to see how yours needs to be modded to take 32mb cards because I tried 24mb and 32mb games with mine and they work fine.
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Mystic_Merlin



Joined: 15 Oct 2007
Posts: 496
Location: Bangkok

PostPosted: Fri Jul 03, 2009 6:50 am    Post subject: Reply with quote

eastbayarb wrote:
system64 wrote:
Tomy wrote:
MD adapter need to modify to support over 16M games. So, your MD adapter is good because it can run 1-16M without problem.


Thanks for your reply. How can I modify the MD adapter?


I noticed mine has a 24mb/32mb switch. I am gonna crack it open and post pics of the PCB (if I can). I'll be interested to see how yours needs to be modded to take 32mb cards because I tried 24mb and 32mb games with mine and they work fine.

I would be really interested in that one too! I remember there are only a couple of screws on the back of the interface.
I wonder if there's ever been a HiRom mod for the SFC interface.
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rocco



Joined: 01 Feb 2008
Posts: 16

PostPosted: Wed Jul 15, 2009 7:32 am    Post subject: Reply with quote

Tomy wrote:
MD adapter need to modify to support over 16M games. So, your MD adapter is good because it can run 1-16M without problem.


Tomy can you please let us know how to modify that adapter to get >16M Games running? Thanks.
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Tomy
Site Admin


Joined: 02 Aug 2005
Posts: 414

PostPosted: Wed Jul 15, 2009 12:09 pm    Post subject: Reply with quote

rocco :

Yes, it is no problem. I have one here. I need to open it and take picture first. It has a switch that select 1-16M and 17-32M game. But if game over 16M, I'm not sure if rpg game still can save or not. In my view, I think it can't. (not confirm yet)

Please wait a bit, I'll send picture very soon.
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kyuusaku



Joined: 26 Jul 2003
Posts: 941
Location: .ma.us

PostPosted: Wed Jul 15, 2009 3:43 pm    Post subject: Reply with quote

Saving is probable if the /TIME signal is connected to the ASIC. The first 24M RPGs came out in 1993, so it was maybe too late.
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system64



Joined: 17 May 2009
Posts: 112

PostPosted: Wed Jul 15, 2009 5:25 pm    Post subject: Reply with quote

I don't care about saving. I just want test 24M / 32M games.
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Tomy
Site Admin


Joined: 02 Aug 2005
Posts: 414

PostPosted: Sun Jul 26, 2009 6:24 am    Post subject: Reply with quote

Still no time yet. But I found my modded MD Dram I/O now. It has two switch. One is 1-16M/17-32M mode switch. Another no idea yet. I write it on the I/O say it is special mode/normal mode long time ago. Forgot it now. Will check it out next week.
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system64



Joined: 17 May 2009
Posts: 112

PostPosted: Mon Aug 17, 2009 6:26 pm    Post subject: Reply with quote

Tomy wrote:
Still no time yet. But I found my modded MD Dram I/O now. It has two switch. One is 1-16M/17-32M mode switch. Another no idea yet. I write it on the I/O say it is special mode/normal mode long time ago. Forgot it now. Will check it out next week.


Hi Tomy,
do you have any news about the 32M DRAM I/O for the MD?
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philjay



Joined: 19 Dec 2022
Posts: 22

PostPosted: Sat May 27, 2023 6:08 pm    Post subject: Reply with quote

I take this post back from the dead... I would like to know how modify to support 16/32 mbit roms on Megadrive
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