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I'm having a weird problem with this MV1C. Some games refuse to work with it, specialy games with copy protection, Like Kof 2000, MEtal Slug X, Kof 98, etc. Multcarts like the 161 in 1 won't work either, it gets stuck on a black screen. Normal games without the protection works fine, like...

I got this KOf 95 and some graphics were glitched out. Graphics like impact effects, fire, blood, rain, some Characters in the intro, the little monkey on the Italy stage, the girls at the background on the Woman's Team stage, etc, were affected. All those graphics are stored in c7 and c8, so...

I have a Mv1c with a backup ram error, whem I use the Unibios I can bypass the error but I can't use it in MVS mode. Using the Neo Diagnostic Bios, i got a screen telling me that the upper Bram Is Unwritable. Should I replace the backup ram? I assume it's the upper Winbound chip (RAM2), right?

I'm trying to revive this Marvel vs Street Fighter (Hispanic version) with no succes, using the Arduino method by Eduardo. The board is getting 5.05v, I've re-checked the pinouts and nothing seems wrong. I've already revive some boards with conector 9 in them and even one revision 4 orange...

I'm using this RGB PCB with impedance matching signals by noob in my CMVS: https://oshpark.com/shared_projects/R8NJ9UQ4 The colors are good but the picture is too dim if compared to the image i got with just using resistors in the RGB lines. I'm using a Scart to YUV converter in a Sony CRT...

I was watching a Youtube video about those chinese CMVS and i noticed that it uses an AM29F400BT as a Bios instead of a normal Bios or a NeoBiosMasta adapter. Is it safe to use one of those? Is it a direct swap? In the video in question you can see that the first and second pins were lifted...