ID2 Net Dimm Board

OldFoo · Post by **OldFoo** » Sun Nov 28, 2010 2:01 am

Is a Net Dimm board different when it is originally from a Initial D version 2 cab?

The problem: Some games work perfect no problem at all. Other games give me a error 22 they might play fine for a few minutes then reset and give error 22 message. I have tried taking the DIMM apart and resetting the daughter board. The DIMM is from Initial D 2 is there something different about this DIMM board that makes it act different? I thought I had read something about "Serial to parallel conversion"? Or maybe some kind of alternate dip switch setting on the dimm main board? When I got the system it came with a communication board for linking. Is there a switch to tell it that this communication board is there or not?

On a game like SPAWN if I goto game settings menu and turn the network setting from slave/master to OFF then I don't get any problems. But on a game like Toy Fighters I get to play for like 3 minutes and then the game resets to error 22. There is no setting to turn off the networking in the game settings menu of Toy Fighters.

I have switched out the Naomi 2 motherboard, cables, and even the I/O and no change in the problem. I have checked the voltages. Any idea what is going on??

OldFoo · Post by **OldFoo** » Sun Nov 28, 2010 11:37 am

Can you take a photo of your jumper positions?

Also, what version is the DIMM board running?

Some others probably know about anything ID2 specific, but I can verify the jumpers for you, and if it's not the latest ver you probably want to upgrade.

OldFoo · Post by **OldFoo** » Sun Nov 28, 2010 3:55 pm

Most ID's I see are fitted with a Net Dimm firm 3.03 (Export/UK market)

However in USA seems on some machines they used regular (non-net) dimm boards.

Jumpers should be fine, ID2 requires a 256MB dimm board, so on that dimm board you should be able to run ALL Naomi 1 and 2 GD-ROM games (except for VF4-FT which requires 3.17)

OldFoo · Post by **OldFoo** » Mon Nov 29, 2010 6:14 pm

One thing you should check is the voltages while the troubled game(s) is running. As the system uses more CPU resources, demands on power rise.

OldFoo · Post by **OldFoo** » Mon Nov 29, 2010 9:29 pm

Is there some dip switch setting that means "don't check for the communication board"? Every game keeps looking for a communication board even though they don't use one it seems. Maybe I am way off though.

Some way to "default off" the communication board.

Thanks for the help.