I saw this right after stumbling upon the realisation that some Super Nintendo games split their ROMs over two chips which got me all excited. I can provide pictures of finished carts and them functioning. If this is not clear enough I can go into more detail. While you’re at it you may want to replace the battery, who knows if its good or not. If you mess this up it obviously will not work. The fist chip should be soldered into the lower maskrom slot, the second chip should be soldered into the upper maskrom slot. use your chip writer to write the first four pieces to a 27C160 chip, and the second four pieces to the second 27C160 chip.
Get a hold of the Sonic 3 Complete rom, byteswap it and split it into 512KB pieces. (but one could make both of these great games using this process….) You would be a horrible person if you used Beyond Oasis or Phantasy Star IV as a donor.
SONIC 3 COMPLETE SERIES
I used World Series Baseball ’95 for mine. These are all 4MB capable carts with SRAM+Battery saves, using 2 2MB maskroms. Phantasy Star IV: The End of the Millenium Here are the donors that I believe will work: I was able to make a copy of this with a functioning save, if anyone is still interested.
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