Sega Normal Non NET Dimm Upgraded to 4.02 - Problems....

[nem]

I don't understand. For what purpose? All GDROMs come encrypted? Zero key pic will only work with decrypted images.

 

[Starcade]

I’m not tech orientated, just looking and hoping something will get a 4.02 version Dimm board to load GD ROMs.

Does firmware 4.03 change anything?

 

[ForestOfDreams]

4.03 would let you use burned discs.
So a decrypted burned image should work.

 

[nem]

I don't think that's right. I remember there being issues with decrypted games:

Post in thread 'Naomi Net DIMM CD-R 4.03 firmware hack'

Sep 12, 2020

I flashed my net DIMM with 4.03 with CD-R support, and then 4.03 with CD-R support and ‘possible’ media check time bomb fix.

The good news is my net DIMM didn’t brick!

I’ve had some success; only with loading and running a game from a CD-R containing an encrypted game binary using original PIC with the key for that game.

While the game loaded and ran, I chose not to test the one-hour media check time bomb fix at this point as I wanted to attempt to get decrypted games loading from CD-R.

As it stands, I’ve not yet managed to load a game from a CD-R containing a decrypted game...

• idc

• 

Anyway, there is zero reason to use burned CDRs and when you can just use CF cards.

Also, I'm pretty sure 4.02 works just fine GDROM drives.

 

[MetalliC]

I’m not tech orientated, just looking and hoping something will get a 4.02 version Dimm board to load GD ROMs.

so called "4.02" hack is official 4.01 firmware with removed CF card vendor check and protection, just a few byte patch.
it change nothing in other parts, including GD-ROM boot.

 

[MetalliC]

I don't think that's right. I remember there being issues with decrypted games:

I think it should work, I'd guess idc didn't cooked proper 256-byte XXX.BIN file, with same XXX as text in PIC key, and checksum of decrypted game binary

 

[nem]

I have no idea. Never tried CDR booting. I don't see the point.