SEGA NAOMI Development, emulators & other crap ;) - The ASSEMblergames.com message board

08-22-2005

Hi, i'm new to this forum, so bear with me, I know there have been a few questions about NAOMI dev. and i'm extremely interested myself.

Firstly to answer the very little i know about it, NAOMI does use much of the same hardware (which is already known). I'm not 100% sure if the software uses katana, dragon or whatever else (darkness?) The main differences are of course in AICA with less ram (2mb ARAM) and more vid / sys RAM. Also there are many changed registers in maple and g1 (for rom timing and dmas etc) also the naomi2 of course has another pvr and sh4 and doubles the ram of NAOMI and PVR, also has a geometry processor which has 32MB of RAM.

There are various security chips built into the naomi, but i believe there may be method to bypass this. I am willing to spend some time on modifying a bios, with help from my WIP emulator to possibly obtain more infos or obtain unencrypted prg roms / dump unencrypted files off of gdrom. This will help a lot in the development of software for the system and will tell whether the commercial software uses katana library modified or another library altogether.

more infos: (thX to TheGuru)

gdrom uses MICROCHIP PIC16C621A-20/P

Xicor X76F100 this is the "key" that is talked about on forums where Chankast(dc emu) + naomi are discussed. Dont know if its used only for carts or used in conjunction with dimm board as well.

a friend dug these patent #s up for me:
(DC & NAOMI?) (thX [vEX])
#5460374, #5525770, #5688173, #4442486, #4454594, #4462076. #5688173 <- is the gdrom-security.pdf one

had a lot more i'd like to add to this but i'll have to cut it short, i have guests that just arrived

If ANYONE has ANY infos about NAOMI/NAOMI2/Hikaru or any newer sh4 based SEGA hardware, or any dev hardware/software (including any addon libs for katana?) PLEASE contact me via this message board or IRC (EFNET #emudev .. feel free to drop by and chat as well :) )

I'm sure some are curious about the emulator as well, right now it runs dc bios + demos + some games, and a few other machine bioses (wont speak about those atm). I dont have the hardware to reprogram the bios, and I have a NAOMI2 so the difficulty level is a bit higher, and its bios is untested in the emulator. I also do not have an IO board or any controls yet so it makes testing it a bit difficult.

This emulator is around a month in development, (yes it runs bios and katana samples etc in one month) and it will be public sooner or later. It will include a full debugger and possibly other tools usefull for development. It needs a name, so if anyone can come up a good one let me know :smt023. If anyone has a spare 48pin ZIF EPROM programmer or a NAOMI system i'd be very receptive to donations as well, as i dont have the money for these purchases at the moment.

Wish i had more time to post, I will try to keep updated with this forum as well

ZeZu

Paulo · 08-23-2005

Please keep us updated! I really wanted a decent naomi emulator!

PrOfUnD Darkness · 08-23-2005

Wouldn't be better create a Dreamcast emulator than a emulator of a arcade board still sold by SEGA?
A DC emulator with a good debugger would be really nice.

Anyway, good luck with your project.

PD

KIT786 · 08-23-2005

Chankcast is a pretty good DC emulator.

Gilgamesh · 08-23-2005

Zezu, a member of Icarus team (Dreamcast emulator).

08-24-2005

Thought I had mentioned in the post that it is a dreamcast emulator, and that it runs the SDK samples and many KOS demos and most KOS demos as well. In any matter it probably wont run too much NAOMI stuff for a while b/c of the security, and not much is dumped at the moment.

Thanks for the interest

Dave

PS: nice smiley set :dance

12-24-2005

Well icarus acording to a few people, the core hasn't been touched since 2002 Cyrus hasn't posted in over a year or 2. Its a shame as chankast also seems dead, despite it running a naomi copy of virtua striker 2.

http://chanka.emulatronia.com/Images/News/vstriker2.jpg

Hmph, i really hope theres an upturn in the scene soon

Mark30001 · 12-24-2005

Quote:

Originally Posted by life_247

Well icarus acording to a few people, the core hasn't been touched since 2002 Cyrus hasn't posted in over a year or 2. Its a shame as chankast also seems dead, despite it running a naomi copy of virtua striker 2.

http://chanka.emulatronia.com/Images/News/vstriker2.jpg

Hmph, i really hope theres an upturn in the scene soon

I contacted Chankast team months back, but never got a response. I've also contacted the moderators of the forum, and one of them claims to have sent me a PM although my inbox was always empty.

Cheer up! I'm sure they'll show up someday.

12-28-2005

Unfortunately, Chankast developers have been busy with work and/or other projects. I'm told they may eventually clean and release the source code.

My emulator already does have a good debugger, so whoever it was that inquired about that, you will be able to debug your KOS/KATANA stuff. It even suppports GDB, so you can use insight to "remotely" debug if you'd like.

Dave

08-22-2005	#1
ZeZu Posts: n/a	SEGA NAOMI Development, emulators & other crap ;) Hi, i'm new to this forum, so bear with me, I know there have been a few questions about NAOMI dev. and i'm extremely interested myself. Firstly to answer the very little i know about it, NAOMI does use much of the same hardware (which is already known). I'm not 100% sure if the software uses katana, dragon or whatever else (darkness?) The main differences are of course in AICA with less ram (2mb ARAM) and more vid / sys RAM. Also there are many changed registers in maple and g1 (for rom timing and dmas etc) also the naomi2 of course has another pvr and sh4 and doubles the ram of NAOMI and PVR, also has a geometry processor which has 32MB of RAM. There are various security chips built into the naomi, but i believe there may be method to bypass this. I am willing to spend some time on modifying a bios, with help from my WIP emulator to possibly obtain more infos or obtain unencrypted prg roms / dump unencrypted files off of gdrom. This will help a lot in the development of software for the system and will tell whether the commercial software uses katana library modified or another library altogether. more infos: (thX to TheGuru) gdrom uses MICROCHIP PIC16C621A-20/P Xicor X76F100 this is the "key" that is talked about on forums where Chankast(dc emu) + naomi are discussed. Dont know if its used only for carts or used in conjunction with dimm board as well. a friend dug these patent #s up for me: (DC & NAOMI?) (thX [vEX]) #5460374, #5525770, #5688173, #4442486, #4454594, #4462076. #5688173 <- is the gdrom-security.pdf one had a lot more i'd like to add to this but i'll have to cut it short, i have guests that just arrived If ANYONE has ANY infos about NAOMI/NAOMI2/Hikaru or any newer sh4 based SEGA hardware, or any dev hardware/software (including any addon libs for katana?) PLEASE contact me via this message board or IRC (EFNET #emudev .. feel free to drop by and chat as well :) ) I'm sure some are curious about the emulator as well, right now it runs dc bios + demos + some games, and a few other machine bioses (wont speak about those atm). I dont have the hardware to reprogram the bios, and I have a NAOMI2 so the difficulty level is a bit higher, and its bios is untested in the emulator. I also do not have an IO board or any controls yet so it makes testing it a bit difficult. This emulator is around a month in development, (yes it runs bios and katana samples etc in one month) and it will be public sooner or later. It will include a full debugger and possibly other tools usefull for development. It needs a name, so if anyone can come up a good one let me know :smt023. If anyone has a spare 48pin ZIF EPROM programmer or a NAOMI system i'd be very receptive to donations as well, as i dont have the money for these purchases at the moment. Wish i had more time to post, I will try to keep updated with this forum as well ZeZu Last edited by ZeZu : 08-23-2005 at 01:38 AM.

08-23-2005	#2
Paulo PoeticHalo Staff Join Date: Mar 2004 Location: London, UK! Posts: 5,715	Please keep us updated! I really wanted a decent naomi emulator! __________________ Forum Moderator

08-24-2005	#6
ZeZu Posts: n/a	It is of course a dreamcast emulator too Thought I had mentioned in the post that it is a dreamcast emulator, and that it runs the SDK samples and many KOS demos and most KOS demos as well. In any matter it probably wont run too much NAOMI stuff for a while b/c of the security, and not much is dumped at the moment. Thanks for the interest Dave PS: nice smiley set :dance

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08-23-2005	#3
PrOfUnD Darkness Ranking Member Join Date: Mar 2004 Location: Brazil Posts: 702	Wouldn't be better create a Dreamcast emulator than a emulator of a arcade board still sold by SEGA? A DC emulator with a good debugger would be really nice. Anyway, good luck with your project. PD

08-23-2005	#4
KIT786 Active member Join Date: Apr 2004 Location: Slough, UK Posts: 147	Chankcast is a pretty good DC emulator. __________________ I agree to all auction guidelines.

08-23-2005	#5
Gilgamesh Member Join Date: Aug 2005 Location: France Posts: 91	Zezu, a member of Icarus team (Dreamcast emulator). Last edited by Gilgamesh : 08-23-2005 at 07:27 PM.

12-24-2005	#7
life_247 Posts: n/a	Well icarus acording to a few people, the core hasn't been touched since 2002 Cyrus hasn't posted in over a year or 2. Its a shame as chankast also seems dead, despite it running a naomi copy of virtua striker 2. http://chanka.emulatronia.com/Images/News/vstriker2.jpg Hmph, i really hope theres an upturn in the scene soon

12-28-2005	#9
ZeZu Posts: n/a	Unfortunately, Chankast developers have been busy with work and/or other projects. I'm told they may eventually clean and release the source code. My emulator already does have a good debugger, so whoever it was that inquired about that, you will be able to debug your KOS/KATANA stuff. It even suppports GDB, so you can use insight to "remotely" debug if you'd like. Dave