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Nintendo Entertainment System · Improvement

Mega Man 2 Optimization

By LSM

Mega Man 2 · All hacks & resources →

Mega Man 2 Optimization gameplay screenshot.

About this project

These are optimization patches for Mega Man 2/Rockman 2. It includes the MMC1 (original) and MMC3 versions.

Patch had been optimized a lot and some bug fixes were made.

Patches are free to use. Please prepare a clean Mega Man 2/Rockman 2 ROM and patch it from the correct IPS.

For more information and the changelog, please see the readme file.

Original game requirements

Database match: Mega Man 2 (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 2290D8D839A303219E9327EA1451C5EEA430F53D
File CRC32: 5E268761
ROM SHA-1: 2EC08F9341003DED125458DF8697CA5EF09D2209
ROM CRC32: FCFC04D

Database match: Rockman 2 - Dr. Wily no Nazo (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: FB51875D1FF4B0DEEE97E967E6434FF514F3C2F2
File CRC32: 30B91650
ROM SHA-1: 3E9DC769E1B63E73834786EC7FE9EDE7E706C72F
ROM CRC32: 6150517C

Creator credits

LSM: Hacking

RELEASE 1.02

Readme & instructions

8047readme.txt

Mega Man 2 Optimization - by LSM Last update: 2023.9.2 (v1.01) This patch include 4 files, they both have different meaning. Mega Man 2 Optimization is used for US version, aka Mega Man 2. Rockman 2 Optimization is used for JP version, aka Rockman 2.

Read moreRead less

Mega Man 2 Optimization - by LSM

Last update: 2023.9.2 (v1.01)

This patch include 4 files, they both have different meaning.

Mega Man 2 Optimization is used for US version, aka Mega Man 2.

Rockman 2 Optimization is used for JP version, aka Rockman 2.

MMC1 and MMC3 means patched ROM's mapper.

All of MMC3 patches aren't extended, but you can extend it later.

These patches are free of use.

-- Features --

1. Enable WRAM to optimize stage scrolling and TSA running.
2. Optimize sprite ASMs (No delay animation and be longer i-frames even if full OAMs.)
3. Others (Most of QoLs, remove pause playing, increase climb ladder speed, refill instantly and etc.)
4. Bug fix (Fix "Cannot continue when Mega Man drop into pits in specific conditions and back to checkpoint.")

-- How to use it --

Please prepare the clean Mega Man 2/Rockman 2 ROM and patch it from correct ips.
Don't patch any in progress, abandoned or finished work. Please aware of your own risk. (mess graphic, hardlock or unknown bug.)

Special thanks:

Puresabe
Rock5easily
Himajin Jichiku
nesdev.com
6502.org

-- logs --

v1.0 - 2023.8.29

First release.

v1.01 - 2023.9.2

1.Reprogamming ASM to remove instruction.
2.Remove flash on screen during ending.

v1.02 - 2023.9.6

1.Remove unnecessary code, reduce 3 CPU cycles.
2.Scrolling fixed (Rockman 2 MMC3 Optimization.)

Download 8047readme.txt ↓

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