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philjay · Joined: 19 Dec 2022 Posts: 13

Hi, is it possibile to play sf2 ce on megadrive with a Mgd 2 with a 32mbit card?
How can i set up the interface to play a 24mbit card. I can set up 8/16/32.

Thank you

mrforever · Joined: 19 Nov 2007 Posts: 74

put directly 32mb of ram

philjay · Joined: 19 Dec 2022 Posts: 13

Thank you, i tried but nothing. The dram works well, i can fill every slot and works. 2 slot filled with a game of 16mbit and 2 of 8mbit each works.

mrforever · Joined: 19 Nov 2007 Posts: 74

so the 32mbit ram card is faulty.

Mystic_Merlin · Joined: 15 Oct 2007 Posts: 493 Location: Bangkok

The ram is not faulty, philjay mentioned he could map several games in different area of the ram card.

As you already found out from older threads there's a mod to map >16M games on the MD. I'm not sure if it's some type of demux or a custom mapper but I'd be curious to see it too if anyone has one.

philjay · Joined: 19 Dec 2022 Posts: 13

I would like to know if anyone has ever thought to make a pcb gerber file to print of the dram card for mgd2. I think is simple to find the dram chip inside, the problem is drawing the pcb. Internally not seems complicated, just a pcb a 4 dram with a plastic cover.

NorQue · Joined: 08 Jul 2006 Posts: 57

Yeah, MGD2 RAM cards super simple, indeed. It's on the plan for one of these rainy days, if someone else wants to give it a try I attached a picture of the PCB. Higher quality available on request. RAM is NEC D4248000GS, datasheets are available on the net.

EDIT: added another backside picture with a ruler.

philjay · Joined: 19 Dec 2022 Posts: 13

would be great, if someone draw the pcb from the photos!!!