Arcade Otaku - アーケード オタク

With this tutorial,you will be able to convert an nonnetdimmboard for Naomi to a new version which accept compact flash !

This is my latest technique found,the safiest,100% sure no brick !
My gift to the communauty



I take no resposability if you broke something and/or brick. This manipulation need solder skills !
Do it at your own risk !

For information,this is the kind of chip you need to solder:



You need:

- An Eprom programmer

Version 1
If you use your dimmboard flash rom(SHARP LH28F160S3T) you need an tsop56/dip48 adapter (if needed by your programmer)

Version 2
- an tsop48/dip48 adapeter (if needed by your programmer)
- one flash rom (ST M29W160EB70N6E or equivalent like Fujitsu 29LV160TE90PFTN)

- Solder (not glue,hein!)
- firmware 1 Here
- firmware 2 Here
- an netdimmboard
- an naomi
- all you need to send a file using netboot

- or ask "skilled" people to do it
(like mitsurigi-w or me for example(not to influence your choice,all the money to me is given to a child))



The trick:

- Open your dimmboard
- Look at the flash rom to desolder at IC14/36


- Desolder it


Burn firmware 1

- Resolder flash rom

et voila! first step!

Now open your Netdimmboard and take rams and the daughter board.
Put it on your old dimmboard

Start your Naomi with your old dimmboard in it,and using net boot,send Firmware 2
Follow on screen instructions to burn it.
Congratulations,its an 4.02 dimmboard now!

Put rams and daughter board back to you Netdimmboard.
Put everything else on your nonnet Dimmboard and enjoy compact flash on it!
Good job,you made it dude!


Problem:

1 - If at start,error 22 comes,your flash rom is badly soldered.Resolder it

2 - If you are 3000% sure and still error 2,recheck your solder or even resolder again!

3 - and if it doesnt works?
- Maybe an buffer chip is dead,specialy an Fairchild.
change it.

look at the dimmboard, IC12S
to eventually change it

4 - and what if still error 22????
look number 2

Feel free to ask me help or questions about this,it will be a pleasure to answer you!
I can do the trick for you too,if you dont have hardware or dont want to it.

Merry Christmas to all of you !

Thank you for sharing this, Tyler. Great to see peeps sharing with the community

What flux do you use and what temp do you set your iron?

purplec wrote:What flux do you use and what temp do you set your iron?

to desolder i use an weller pyropen piezo,with hot gun

solder,using an standard solder/desolder station at 300/350°C max
i use that flux


http://www.makertronic.com/chemtronics- ... pen-cw8100"

but i always clean after using isopropyl alcohol

very kind of you

I just happen to have dimm board sitting in a bin...

thanks man and merry christmas !

Thanks a lot for sharing this with the community.

Very nice! To clarify a little:
firmware1 is the bog standard 3.17 - as a flash image ready to burn with a programmer (same md5sum as a flash I desoldered some time back)
firmware2 is a gd-rom/netboot image, which will upgrade the dimm firmware to a patched 4.0 that works with non-net daughterboards.

correct?

Do you need 3.17 for some reason, or is it enough to have the dimm fw current enough to be able to netboot?
Will the firmware2 image above work with normal net-dimms too?

In theory it is possible to hack the 4.02 firm for non net dimm boards in to a regular bios to invoke it from the test mode and hence avoid having to mess around with tsop flashes.

I'm glad you ask thoses questions


You need an 3.17 to enable netboot feature in it's most safe way.
Yes, firmware 2 works on all kind of dimmboard

andygeezer wrote:In theory it is possible to hack the 4.02 firm for non net dimm boards in to a regular bios to invoke it from the test mode and hence avoid having to mess around with tsop flashes.

I havent tried it
But in ththe process, 3.17 firmware is essential except if you want to brick it

Im sûre it can be done by using jtag too but i dont have the tools

hello.
is possible remove the SHARP LH28F160S3T and put the 29LV160TE90PFTN in the dimm board?

Glad this thread got bumped, I had no idea it existed. Thanks for the amazing tut!

polasky wrote:hello.
is possible remove the SHARP LH28F160S3T and put the 29LV160TE90PFTN in the dimm board?

Hello

Yes, both are working.

dear
the downlink is notwork，will u upload it angin？ or send me a copy？
thanks a lot!

need the files too.
plz.
i have a non-netdimmboard, with firmware 1.02.

a big thanks !

Links on first post updated.

Have fun

Hi!
Recently i got regular non-net DIMM board for my NAOMI system and after replacing Fairchild 16245 it work fine.
Now i want to upgrade it to 4.02 firmware. I can easyly desolder flash-ROM, burn it using my programmer, and solder it back. But problem is i don`t have neither net-DIMM nor daughter board from it.
So now i have a question. Is it possible to write "full" firmware directly to flash-ROM without net-boot step? Maybe someone have working dump from his non-net DIMM with 4.02 or something like that.
Or maybe i can take first 1MB from 3.17 firmware and second part from 4.02 updater and merge them to single .bin file using hex editor? Is it work this way?

PS: Sorry for my bad english. It is definetly not my native language.