Recent content by Misos

Sometimes when I use the verify function it reports some errors, but when I check the CRC of the dumped file directly from the SD it matches the original. I will try to replace the sd slot. I've tried different Sd cards but the problem persists. I can't even dump the files from verified working...

Do you guys know if there is any way of accessing the SD card without removing it from the programmer itself? Via USB cable, for example? I think my programmer is busted because of all the inserting and removing the sd card to verify the CRC from the files.

MVS games are pretty straight-forward: you remove the suspect chips, dump them to verify if they are bad, and replace them with new ones. That's it. You will need an eprom programmer and an equivalent eprom for the bad chip.

Regarding the cartridge: bad S-rom, and bad C1 since the Neo Geo logo is garbled. Could be a cut trace leading to the S-rom, check the back of the board near the hole of the screw sometimes traces got cut because of friction with the plastic.

Yes, the problem was with the program I was using, it was spliting the file in a weird way. I used romwak instead to split the file and cmd to mirror it, and it worked. So if you have a JS28F256, You need to split the file in 2, use the first part (the botton half is empty) and then mirror it...

How do you program the S-rom when the cart comes with a JS28F256 instead of a JS28F512? The chip ID returns a 2222 intead of 2223 and when I dump the file the CRC does not match. The M rom was a normal JS28F512 so I had no problems with that one.

The rom has 1 Megabyte = 8megabit, so you need a 27c800.

Would the decrypted Kof 99 rom from the NeoRageX 0.6 romset work on the 161 in 1? It has all the stuff from the final version but has a 128Kb S-Rom.

Seems like an old problem. Here is a new boot being sold on Aliexpress. And is still using the proto rom.

Original black shells from SNK have a white triangle on the back.

Can someone with a working cart confirm if Kof 2000 is working properly? Mine is working, but the letters are all garbled. It's the only game with this kind of problem that i tested so far.

I'm happy to report that I have solved the problem and have a proper working cart now. Reflowed the P-roms and the cart booted properly. The only problem is powering off the system to choose a different game, but I'm not complaining it's worth the trade-off. Special thanks to RockBottom, Vortex...

Just hit a dead end. Cart doesn't boot. It just goes straight to the check board screen. I've programmed everything, dumped and checked the Cr32 for every chip's content before soldering them into the cart. Could this be related to the CPLDs? I've never used Quartus before, so I'm not sure if...

In my case: C1: 0 errors, C2: 2 errors, V: 3 errors. I thought it was the daughterboard's fault because the cart was working before I desoldered everything.

I see. Thank you. There's definitely something wrong then. I think it could be the stock daughter board because I reflowed the pins on the C-chip and it does not report any errors anymore. I will order a new daughter board. I have a spare non-working cart that I can use for chips, fortunately.