Naomi.zip Download

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Siri

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Aug 5, 2024, 11:30:20 AM8/5/24

to dinspsychzoomli

Ive been at this for about a month now and have had great success getting many things set up. Most of this is due to the excellent work the community has put into helping newcomers and sharing information. I am truly thankful for how easy this is after all of these years.

I'm sure I'll be back here in future forum posts bothering you all about other Systems but today I've run into a problem getting Naomi games to work with the Flycast core in Retroarch -

I have a few hunches as to what could be wrong - I currently have a .zip file called naomi.zip in my System folder for Retroarch that contains several "BIOS FILES". I've found the same pack at several sites and so assumed it was fine but upon further inspection, I see that I need to rename an epr-21576h.bin to naomi_boot.bin.

The .zip I have does have a file called epr-21576h.ic27 but no epr-21576.bin. Is the .ic27 the same thing? It is in there with many other epr-21576/7/8(x).ic27 files and I am not sure if I need all of these as they are not mentioned in any of the troubleshooting topics I can find. Also, is it fine in the .ic27 format? Must it be renamed to be recognized? Is the file (if renamed) alright inside of a .zip archive or does Retroarch require it to be decompressed and placed in the System directory? Some help on understanding the various .ic27 files, their purpose, their relationship to the .bin file (to be renamed naomi_boot.bin), etc... would be helpeful.

I have been examining my Naomi games compared to what other people online say I will need (including ETA Prime's excellent video on the subject) and have also compared them to what I have in my Atomiswave games.

They do NOT have a .lst file. I see that these were the files to add through the Launchbox ROM import according to ETA Prime's video. In researching further, it appears that the .lst files act as some sort of hash to confirm the size of the game? Not sure if they are truly necessary to open the archive or if telling Launchbox to simply use the .zip files for the Emulator will be enough for the Emulator to know what to do.

I thought that this must surely be the issue until I saw that my Atomiswave games are very similar to my Naomi games. They, too, come zipped and do not have .lst files and they run fine (again, full of just .bin and .ic and .mrom files).

I am open to the possibility that my Naomi pack of games are outdated or are not compatible with the Emulator/Core I am trying to use but the similarity to the Atomiswave games (retrieved from the same source and roughly of the same age) leads me to believe that my .zip Naomi games are fine and it is, in fact, a BIOS issue.

For now, I will try to find an exact epr-21576h.bin (not .ic27) file and rename it to naomi_boot.bin and will try to remove any and all other references to Naomi from my Retroarch/System folder in case the Core is trying to load some other random file it is finding there. I'll also search for another ROM pack.

I apologize for how verbose this is. I work in IT and know that I always work better off of more information, not less. Also, I am hoping to help others troubleshoot here in the future once I get my system fully configured and running so I am hoping that by asking detailed questions I will get detailed answers that will not only help me get the system working, but will also teach me some of the nitty gritty details that will make me of more use to someone else in the future.

Does retroarch have easily readable log files? I did a quick Google search and found that it logs to a file called retroarch.log, but I am unable to locate that file. I think that perhaps I need to enable a higher level of logging from the command line or something prior to launching.

Also, a detail I left out - When launching the Naomi games in Retroarch (be it through Launchbox or standalone), it doesn't throw any error messages or default back to a Launchscreen for Retroarch. It just crashes (closes) without warning.

The naomi.zip file that I have appears to be a MAME BIOS file from at least version .154 or later and the .ic file that I was referencing in my previous post IS the correct one to be renamed to noami_boot.bin. With that said, I'd somehow had a copy in a /dc folder (which I see is how some suggest you do it) and another copy one level up from that in my /system folder. Cleaning these up did not fix the issue.

Also, the .zip files that I had did not come with the .chd's so I downloaded a new pack and this one appears to have them. I've also read that they need to be in the same directory as the .zip files for Flycast/Reiscast to use them properly (so I did that). This did not resolve the issue.

I'd read somewhere that someone just had to completely delete flycast from their Retroarch system and reinstall the core. Did this, updated everything in Retroarch. This did not resolve the issue.

That is more likely an issue with a bad rip, there are a lot especially for Dreamcast with the different formats. Some emulators are better than others for different format, but anytime I had that issue, a different rip fixed it.

Some of the games in the pack give me a "01 THIS GAME IS NOT ACCEPTABLE BY MAIN BOARD" error but according to this thread from Feb of this year, it may be because Flycast doesn't fully support Naomi 2? I will research further but for now, 3/4 I've tested work -

-Sega-Naomi-via-retroarch-library-Error-01-on-loading-games

Back when I'd first started troubleshooting with this new ROM set, I had placed the .zip files for games in the folder where matching .chd's sat. (for example, azumanga.zip was placed in /azumanga because azumanga.chd was there).

Once I removed the .zip files from those directories and placed them where they were when I'd downloaded them (along with the other .zip's that did NOT have .chd folder/files), those games started working.

Trstruggle to get light-guns going and I got Ninja Assault working with Aimtrak so I have hope for other ligjgun titles in Naomi. But I could never got atomiswave games to work. A extreme hunting 1 & 2, sport shooting usa..all have my cross hair locked in the down right part of the screen(!) anyone want to try as some of you state that all Naomi1 games working for you. ? Thanks for the thread hijack

I've been playing Dreamcast on LaunchBox using RetroArch but for some reason it stopped. I made sure to uncheck the "exctrat" box on the associated tab, but it still didn't run. I tried running it on RetroArch and now it's not running there either. I'm now getting a "cannot load BIOS from naomi.zip"

Redream does not support Naomi games. As for the original post, the error is clearly your bios, either it is missing completely, or you are missing specific files within it. If you load the core in Retroarch and head to the information section it will tell you what bios are required, and if it see's them or not. You need the naomi.zip bios, i would guess the most recent one from the current MAME romset is the one the core would want, so even if you have bios it may be old and out of date, This is the contents of the naomi.zip from the 0.236 MAME romset, which is the newest set i have.

This RetroArch docs page lists all the bioses you need for arcade emulation with the Flycast core. Like neil9000 mentioned, the easiest way to find them is in a (recent) Mame romset. But google will do too. Just make sure the bioses are fairly recent and naomi.zip contains the romfiles listed in neil9000's screenshot. Place the bios files (zipped) in the RetroArch\system\dc\ folder.

I have had a very similar problem. I remember a few day ago launching Retroarch and trying to download the reicast core and finding it. Upon trying to use it as the default I get the nice little dreamcast console decoration as the background and it starts the bios. After the bios screen every game crashes.

jodiaz1486 You can keep them all but over-copy all of them to naomi.zip. this way you have them all in 1 zip. Some of them will clearly overlap. Make sure you have Naomi.zip in Bios, Naomi and Atomiswave folders as well. Did you try: BZZ 'Once you have these copy 'epr-21576g.ic27' to bios folder('\BATOCERA\share\bios') and change it to naomi_boot.bin. If this one does not work use 'epr-21576h.ic27'. These are the two I had the most luck with.' Someone else earlier said that copying 'naomi_boot.bin' to actual naomi folder helped but I would just put it in naomi.zip. You can always try both. Try to reboot system between tries as well. Might not make much difference but eliminates additional factor ;-)

I appreciate the help, but I do not get anything different from what I've been looking for before. the problem with the naomi persists, when I choose a game and it starts to load the emulator, only the frame of the naomi appears and the screen freezes and I can not close it. I need to close it by turning off the computer

jodiaz1486 I don't think it's a bios error. Have you checked which version you have of OpenGL? I believe that older versions hangs the emulator when trying to start Naomi/atom. I might be wrong but that's the conclusion I got from several threads about this.

What I get to understand these bios are set in the system directory as it is done with the neogeo.zip for neogeo, naomi. zip contains everything about naomi when using cartridge, the naomi2.zip containing everything related to naomi 2, and naomigd.zip is the reference when using GDI discs or at least to detect the rom in any of these features and can be emulated