Has Anyone Region Swapped a Mach Breakers PCB? Having Issues Trying...

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    • Has Anyone Region Swapped a Mach Breakers PCB? Having Issues Trying...

      New

      Recently picked up a Numan Athletics 2 / Mach Breakers Japanese PCB. Looking at the rom sets in MAME, it seems like a pretty easy task to swap it over to the World edition. Basically erase and burn the two program roms, 11C and 11D. I've now tried this twice, and can't seem to get the board to function properly using the World roms.

      Condensed Info:

      - The PCB fully works if I re-burn the Japanese Program ROMS.
      - According to MAME, the only differences between the original Japanese version (MB1 romset) and the World edition, are those two Program Roms (MB2 romset).
      - Pulling all socketed EPROMs and verifying them against the Japanese romset in MAME comes back 100% accurate. There are a number of surface mounted flash roms as well, that I do not currently have the ability to remove. They are correctly identified, via their silk screening as belonging to the MB1 romset.
      - Using the World Program roms switches the language completely to English, but there are odd bugs.
      - The attract mode demo can sometimes reset the game, and various graphics that should be present (flags behind characters during selection) are either missing or completely wrong / a jumbled mess.
      - The service menu of the World edition should have an option for region selection (N. America / Europe OR Asia). My PCB with the World program roms installed gets defaulted to the Asia version, I am unable to switch it to the N. America / Europe option.
      - The Asia version is supposed to remove various Japanese references from the game, so it could be used in the Korean market. My Japanese version with World Program roms doesn't remove them. Even with the game being stuck on the Asia version.
      - The PCB w/ World Program roms does actually work when playing the game. At least the first three stages (only tested up to that point). No graphical issues, and everything is in English.
      - Other glitches and weird issues with the attract demo, but you get the idea.

      Has anyone done a region swap on this PCB before? Am I just overlooking something dumb? I've blank checked my EPROMs every time before burning, and verified the written data after each burn. Everything always comes back 100%. I even gave the EPROMs the full 30 minute erase cycle this last time, just to make sure there wasn't any lingering data. Again, this region swap seems like a no brainer. Any ideas are welcome.
    • New

      I own 2 of these PCBs and have region swapped both from JP to World Region doing exactly this:

      Shadoron wrote:

      burn the two program roms, 11C and 11D
      it sounds like it's already too late but I very much discourage ANYONE from erasing original ROMs. having the original ROMs would give you something to go back to test with, and keeping them arguably adds some value to your PCB as original ROMs with original labels are more desirable than replacement ROMs or re-burns. I've also had lots of issues getting old ROMs to erase and take a new program.

      When you erase the original ROMs are you blank checking them? and after you program them are you verifying them?

      Also are you sure the source files your using are good?
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    • New

      twistedsymphony wrote:

      I own 2 of these PCBs and have region swapped both from JP to World Region doing exactly this:

      Shadoron wrote:

      burn the two program roms, 11C and 11D
      it sounds like it's already too late but I very much discourage ANYONE from erasing original ROMs. having the original ROMs would give you something to go back to test with, and keeping them arguably adds some value to your PCB as original ROMs with original labels are more desirable than replacement ROMs or re-burns. I've also had lots of issues getting old ROMs to erase and take a new program.
      When you erase the original ROMs are you blank checking them? and after you program them are you verifying them?

      Also are you sure the source files your using are good?
      Yes, everything that TS just said!
    • New

      Shadoron wrote:

      Basically erase and burn the two program roms, 11C and 11D.
      Ooops I missed that. Definitely what @twistedsymphony said, I would try different eproms and blank check for sure.
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    • New

      Thanks for the replies. Yes, I have blank checked and verified the EPROMs both times I burned them. My next step will be to grab some new replacement EPROMs and give them a shot. I had some used 27C240's laying around that I used for the World roms. I was beginning to wonder if they might be bad... although again they did blank check and verify 100% after burning. Now that I have confirmation that I only need to swap those two roms for the conversion, I'll order some new ones and see where that gets me.

      I'm using the World roms from the MAME .207 set, they do work correctly under MAME.
    • New

      the 27c240 or 27c2048 can be difficult to source. Make sure your new blanks are the same speed or faster than your original EPROMs.

      You might have an easier time sourcing 27c4096 or 27c4002 which will also work, you'll just want to double the ROM file before burning.
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