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Naomi Cartridge Buffer Chips

Since I went through all my eproms trying to burn... anything, I don't have any left. Went to use my eprom eraser and the door kept getting caught on the tube, tried to force it and broke my UV tube and have another on order from Amazon. It'll be delivered tomorrow sometime. I'll try again tomorrow night and let everyone know what happens.
 
Well I finally have some good news. I was able to successfully burn a bios eprom. Now I just need to tackle the game eprom now. Reason I don't have an update on that is because I'm having a helluva time with getting the 322 to erase with my new eraser. Ugh.
 
I finally got a 322 to erase completely and verified blank on each bank. Burned it. Each bank and rom file burned and verified successfully. Eprom doesn't work. Checked bank for bank and the data matches exactly with the original eprom. There must be some magic or something I'm missing. How can my eprom verify successfully on each bank and match the original one for each bank and not work?
 
Well, I've done it twice now and each time my eprom ic22 doesn't work and the original does if I put it back in. I've even done rejoining of the files and compared to the original and the same thing. Doesn't work. I'm pulling my hair out here.
 
At this point you should probably revisit the eprom burner thread so you can dump/burn/verify 42 pin ROMs at once. I admire your tenacity but at a certain point your time is sinking here IMHO.
 
skate323k137 said:
At this point you should probably revisit the eprom burner thread so you can dump/burn/verify 42 pin ROMs at once. I admire your tenacity but at a certain point your time is sinking here IMHO.
Click to expand...
So I can clearly burn an eprom now for bios, as I stated earlier, that I had finally had success with that earlier today, but I just can't for game roms, doesn't really sound like I have an issue with burning 42 pin eproms now. Finally. And I just don't understand how I can do one but not the other using the same method.

But, your comment about "time is sinking here", do you mean that if I keep asking for help in the same thread and providing updates that I'm still stuck that I can get kicked off the site? I'm not sure I understand your comment any other way. Unless you mean that I'm wasting my own time... I'm not sure really what it means.

I have a stack of naomi carts waiting to be fixed and I'm just trying to learn how to do it. I finally got the bios figured out. But for some reason if I use the same method for the game eprom it doesn't work. All I could think of is that there is some sort of protection in place keeping me from using my eprom vs the one that is being used.

If you could be so kind as to provide the link to the thread you're referring to I would greatly appreciate it and just withdraw myself from this thread voluntarily then.

Thank you in advance. :)
 
I'm not trying to be hostile here, I will explain. When I said -your- time is sinking, I meant that; your time and your time alone. I won't stop offering help to someone unless they skip explicit steps provided in troubleshooting, i.e. ignore advice to check voltages before moving on to graphics issues.

There shouldn't be any protection involved at all with the DIP IC's on the NAOMI (not counting the soldered ones of course here. I just mean the 27c322 or 27c160s).

The comment regarding time was more just to value your own time. I'm not saying you're wasting my/our time... If I don't want to answer, I won't lol! But please, do not take any offense to my comment, it's not meant that way at all. Just, If you have to swap banks around to program 42 pin chips, and it's not something that is 2nd nature to you, it becomes a quick calculation for me (personally) on when I invest in other/better tooling. I also spend hours down rabbit holes learning, and the education itself is very vaulable, so I'm not saying you are doing anything wrong. And by all means, ask for help man, that's why we are here. But to put it in an analogy, you can only spend so much time under a car with a crescent wrench on a long bolt before it's worth your time to just crawl out and get a better tool for the job (ratchet and a socket wrench). I hope that makes some form of sense.

The fact that you can get a NAOMI BIOS working, but not a different image on a 27c160 would suggest something going on outside your burner setup, that is true.

Here's the thread regarding burners, it's quite extensive:

https://www.arcade-projects.com/thr...ammer-for-most-arcade-hobbyists-to-have.4046/
 
stj said:
are you using 27c322's to replace 27c160?
they have different pinouts!
Click to expand...
I was using 322 for the game eprom and 160 for the bios. Can't get a single 322 to work for a game eprom. I read somewhere that you can use 160 for game eprom but have to switch a jumper on the board. But I'm so confused that I can't get a single 322 to work but I can get a 160 to work. I even checked my eprom dump on Hamster and it reads it as a legit rom for CapvSNk1. Not sure what to do.

skate323k137 said:
I'm not trying to be hostile here, I will explain. When I said -your- time is sinking, I meant that; your time and your time alone. I won't stop offering help to someone unless they skip explicit steps provided in troubleshooting, i.e. ignore advice to check voltages before moving on to graphics issues.

There shouldn't be any protection involved at all with the DIP IC's on the NAOMI (not counting the soldered ones of course here. I just mean the 27c322 or 27c160s).

The comment regarding time was more just to value your own time. I'm not saying you're wasting my/our time... If I don't want to answer, I won't lol! But please, do not take any offense to my comment, it's not meant that way at all. Just, If you have to swap banks around to program 42 pin chips, and it's not something that is 2nd nature to you, it becomes a quick calculation for me (personally) on when I invest in other/better tooling. I also spend hours down rabbit holes learning, and the education itself is very vaulable, so I'm not saying you are doing anything wrong. And by all means, ask for help man, that's why we are here. But to put it in an analogy, you can only spend so much time under a car with a crescent wrench on a long bolt before it's worth your time to just crawl out and get a better tool for the job. I hope that makes some form of sense.

The fact that you can get a NAOMI BIOS working, but not a different image on a 27c160 would suggest something going on outside your burner setup, that is true.

Here's the thread regarding burners, it's quite extensive:

https://www.arcade-projects.com/thr...ammer-for-most-arcade-hobbyists-to-have.4046/
Click to expand...
Thank you for the explanation. Very much appreciated. I'm definitely one of those guys that will hit his head against a brick wall till it gives in and crumbles. lol. Yeah, I thought about investing in a top3000 but I didn't see a bank switching option on it, don't know if it requires an adaptor or not. I will take a look at the thread here in a second. Just don't understand how one chip works and the other one doesn't.
 
Papalati said:
I thought about investing in a top3000 but I didn't see a bank switching option on it, don't know if it requires an adaptor or not. I will take a look at the thread here in a second. Just don't understand how one chip works and the other one doesn't.
Click to expand...
No need to bank switch anything on the TOP 3000, the ZIF is more than enough pins to just drop a 42 pin EPROM in and hit it in one shot.
 
skate323k137 said:
No need to bank switch anything on the TOP 3000, the ZIF is more than enough pins to just drop a 42 pin EPROM in and hit it in one shot.
Click to expand...
Oh crap. You mean that I'm only having to bank switch because its a damn adapter? AAAAAAAAARRRRRRRRRRHHHHHHHHGGGGGGGG. Ordered. lol
 
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