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The Legend of Zelda CHR-ROM Conversion MMC1 or MMC3

Hack of The Legend of Zelda


This hack converts Zelda from CHR-RAM to CHR-ROM and optionally to MMC3. This allows the game to run on more hardware variations and makes complex graphics hacks easier to manage. The code can also serve as a reference in how to convert to CHR-ROM and MMC3.

There are several independent patches in this package:

  • mmc1.ips - Converts to CHR-ROM with 4k CHR banking (fits in 32k CHR-ROM)
  • mmc1-8k - Converts to CHR-ROM with 8k CHR banking (fits in 64k CHR-ROM but saves some space in bank 7)
  • mmc3.ips - Converts to CHR-ROM and the MMC3 mapper (fits in 32k CHR-ROM with 8k free)
  • mmc-mapper-only.ips - Converts to the MMC3 mapper with no other changes

All versions have been tested on actual hardware including SKROM, TKROM, and TSROM.

Full source code is included. Run build.bat to see build options.

ROM / ISO Information:

  • Database match: Legend of Zelda, The (USA)
  • Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
  • File SHA-1: DAB79C84934F9AA5DB4E7DAD390E5D0C12443FA2
  • File CRC32: D7AE93DF
  • ROM SHA-1: A12D74C73A0481599A5D832361D168F4737BBCF6
  • ROM CRC32: 3FE272FB




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