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Mega Man X SA1

Hack of Mega Man X


SA-1 is a co-processor present in some SNES games. Being roughly four times faster than the main CPU it can significantly improve a game’s performance and that is the purpose of this hack, to remove slowdowns present in the original Mega Man X.

Other changes include:

  • Leg Dash defaulted to the L button.
  • Generated passwords are saved into SRAM
  • Control scheme saved into SRAM.
  • Subtanks stop depleting at full health.
  • Disabled double-tap to dash.(optional)


  • mmxsa1.ips
  • mmxsa1_double_tap_disabled.ips

Besides zsnes, it should run on all emulators.

Rom disassembled with:

SA1 code based on:

ver. 1.2:

  • Disabled double-tap to dash made into a separate patch.
  • Fixed Chill Penguin’s frozen statues collision.
  • Fixed C. Sting palette effects.
  • Fixed graphical glitch on sea and sky stages.
  • Fixed the amount of health provided by Subtanks.
  • Control scheme saved into SRAM.

ROM / ISO Information:

  • Database match: Mega Man X (USA)
  • Database: No-Intro: Super Nintendo Entertainment System (v. 20180813-062835)
  • File/ROM SHA-1: 449A00631208FBCC8D58209E66D0D488674B7FB1
  • File/ROM CRC32: 1033EBA4




ContributorType of contributionListed credit

User Review Information

This is truly amazing and the best part is the bugs got fixed!

Reviewed By: JUD6MENT on 04 Jun 2020

I have completed my testing for the SA1 patch. I have played Megaman x over 100 times without a doubt because I know I have played it at least 4-5 times a year since I was 5 years old. It is my favorite game of all time. I also think it makes me a really good candidate to give my review on the rom hack.

I originally said I would not recommend this patch but I have changed my review to a solid “YES!” I would highly recommend it! The rom hacker that worked on this actually looked into the bugs and glitches I found and fixed them, he is extremely awesome!

Things That Improve the Game:

1) Gameplay slow down is eliminated. It really showed when fighting the chainsaw machines and riding minecarts in the mine cart stage. It showed no slow down when fighting the mid boss in spark mandrill stage and launch octopus stage or the serpents in launch octopus stage. It showed improvements with the fire pillars in flame mammoth stage if you don’t fight penguin first and make the stage ice. It is really cool stuff I must admit. 2) SRAM saves. It will remember your last password and next time you boot up the game it will automatically have that password ready and you just press start. It is like having a single save file like in a Pokemon game and that is pretty cool.

There is some minor issues with specific emulators:

snes9X 1.60: Save States do not work, but they do work on the 1.55 version I have, weird. Funny enough I even tried a version of snes9x that was made in 2010 and the save state worked there. The SRAM fix though does help make up for this and it is only this specific emulator. I still play on snes9x as it is my emulator of choice and I am not using save states for this game.

Soft-mod Wii and Wii U using the most recent SNES9xGx emulator: Frame rate drop on Launch Octopus stage, but it does not slow down gameplay. This just makes things look a little sloppy on this stage only. Most people will not be using a soft-mod wii though so this is not much of an issue.

My Verdict: I absolutely suggest playing with this patch. It is incredibly fun and the only reason you would not want to play with this patch is if you exclusively play on a snes9x emulator on the newest version and want save states. However, even then, just download an older version of snes9x and play on that one instead for this game and you will be glad you did.

Thank you Bson for your hard work on this rom hack of my favorite game. Greatly appreciated.

Version 1.0 Recommended - Yes

User Reviews
A highly recommended patch!BulkSlash09 Jun 20201.2Yes
The ultimate version of Mega Man X! (Just a couple suggestions)ShadowOne33301 Jun 20201.2Yes
This is truly amazing and the best part is the bugs got fixed!JUD6MENT04 Jun 20201.0Yes
A must! We need Rev 1, though...niuus26 May 20201.1Yes
Awesome!ParkerMcFly07 Jun 20201.1Yes
Unbelievable differencenobi25 May 20201.1Yes
Great Hack! but be careful what Emulator you choose (Video inside)MagusLOGS28 May 20201.1Yes
Great Hack, but needing a tweak or 2Mugen_Ketsueki19 May 20201.0Yes
Great hack, but needs some bug fixesdrunk_caterpillar25 May 20201.1Yes
Much appreciated improvementsMattKimura19 May 20201.0Yes