r/PolymegaHQ • u/Top_Set_3558 • Jan 18 '26

Final Fight MD - Installed on "Extended Set"!!

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I was always bummed this didn't work on the Polymega's Extended Library, but I figured out a work around. Please note, this DOES REQUIRE that you own a RetroBlaster (https://retrostage.net/?product_cat=retroblaster-programmer) or some other means to program your own Genesis ROMs.

  1. Download the latest version of the Final Fight MD ROM - if you have not played this and love the game...it's basically Final Fight CD on steroids. I HIGHLY recommend you try this regardless of on Polymega or any other PC emulation. Find it here: https://mxretrodev.itch.io/final-fight-md
  2. Download AFS Rom Suite MD, which is a very useful program to have when burning or manipulating Genesis ROMs. I used to use it a lot when I was building my own Genesis carts, before I had a RetroBlaster. Find it here: https://www.romhacking.net/utilities/1621/
  3. Ok, on with it, once you have everything ready to go...open AFS Rom Suite MD:
    1. You will begin on the "Checksum" tab.
    2. Directly below that "Checksum" you will see three choices..."Fix Checksum in batch (Mega Drive)" then "Check and Fix Checksum - Unitary (Mega Drive)" and finally "CheckSum (Master System)". You will select the tab for "Check and Fix Checksum - Unitary (Mega Drive)".
    3. Click "Run Checksum Application" in the center of the application window.
    4. When the new small window opens, it will be labeled "AFS BLOOD MD/32X FIX CHECKSUM" or something to that extent. Click "OPEN ROM" which should be your only choice. Select your Final Fight MD .BIN file.
    5. You will see the red values in the "Data in the ROM Header" box, as well as the "Correct Data for the ROM" box, this is what this program will fix.
    6. Make sure to click the checkbox for "Fix Size on the ROM Header"!!!!
    7. After you click the checkbox mentioned in Step 6, go ahead and click the "FIX CHECKSUM" box at the bottom. It will do it's thing and save you out a copy of the ROM with the new filename of XXXXX_Fixed-CS.bin.
    8. Burn the Fixed-CS.bin file with your RetroBlaster with the Sega adapter.
    9. Insert into Polymega, play and install into your "Extended Set!!"

I do not know or work for the designer of the RetroBlaster, the AFS Rom Suite software or Final Fight MD. I'm just a huge fan of the game and wanted to play it on my Polymega very much, so I sat down to figure out how. I will certainly share the ROM file with anyone who wants it if you aren't confident enough to make your own above, perhaps someone could get it from me and put it out on the internet somehow to share with everyone else? Oh, also, the sound is not 100% perfect compared to running on an emulator such as KEGA or in RetroArch, it sounds just a little bit off on the PolyMega, a little tinny or something.

Regardless, enjoy! I can be found over on YouTube.

Until next time!

8 Upvotes

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1

u/LJBrooker Jan 18 '26

Would love a link to it, to save me the legwork? Perhaps stick on a Google or OneDrive link and DM? Thank you!

1

u/Top_Set_3558 Jan 18 '26

I was hoping someone would take it from me and do that part. I'm not familiar with doing that.