Tailsnic

SEGA NAOMI/NAOMI 2/TRIFORCE/CHIHIRO 4.02 DIMM BINARY FILE

06/04/2019 - WARNING: it is possible that after soldering the new chip with 4.02 firm, the dimm won't boot up with black screen effect. For assuring that, try to connect the raw motherboard without any RAM neither the SCSI-50 PCB, and wait at least 30 seconds. If your naomi system ends with a black screen, your dimm is not updatable. You have to solder again the original chip and use the dimm only for GD-ROM, sorry. There isn't any explanation for that, but it may occurs. By the way, if you have the typical "ERROR 22" message, it's probably because your new chip isn't soldered well or you have broken the dimm in the proccess. Anyway, try to solder the original chip and test.

05/06/2019 - It is highly recommended to have a BIOS FREE chip on Naomi base for using the 4.02 firm of the dimm

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3 months have passed since I began this project, and want to share to all the community this contribution. I have extracted the binary file inside an updated dimm to 4.02. The file I'm going to publish it's only useful by flashing it in a TSOP48 chip like M29W160EB-70N6E, and after that by being soldered to the dimm. You can have a direct updated dimm to 4.02 without any support net dimm.

File:Dimm 4.02 FIRM BINARY.rar

I hope you enjoy this. Many thanks.