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Mega Man 2 + Rockman 2 Sprite Lag Reduction Patch

Original game : Mega Man 2

Platform : NES

Author : Justin Olbrantz (Quantam)

Release date : 23 January 2023

Category : Improvement

Patch version : 1.0

Modifications : P

Downloads : 552

ROM Information

Mega Man 2 (USA):
PRG-ROM CRC32 0FCFC04D / MD5 0527A0EE512F69E08B8DB6DC97964632
File CRC32 5E268761 / MD5 8E4BC5B03FFBD4EF91400E92E50DD294
File CRC32 80E08660 / MD5 302761A666AC89C21F185052D02127D3
File CRC32 A9BD44BC / MD5 CAAEB9EE3B52839DE261FD16F93103E6
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Rockman 2:
PRG-ROM CRC32 6150517C / MD5 770D55A19AE91DCAA9560D6AA7321737
File CRC32 30B91650 / MD5 055FB8DC626FB1FBADC0A193010A3E3F

Hack description

This patch eliminates a gross inefficiency in MM2/RM2's sprite buffer clearing method, reducing overall CPU usage by about 8% and lag by at least as much.

This patch has both Mega Man 2 and Rockman 2 versions: mm2spritelag.ips and rm2spritelag.ips, respectively.

For the people asking if this is related to Puresabe's sprite lag reduction hack: not as far as the author knows. The author looked at his hack a little bit after the first person asked. The author doesn't think they use the same method, but they can't say for certain without taking more time and understanding his hack better.

Screenshots

Contributions

Contributor	Type of contribution	Description
Justin Olbrantz (Quantam)	Hacking

Reviews

This patch is so cool!	Googie	2023-01-24	Version 1.0
I love the changes made, everything plays so much smoother now. I definitely recommend that everyone tires this hack out. This is a better experience to play than the original. I really hope that the author can make an update down the road to make it compatible with Kuja Killer's Slide and Charge Shot hack, that would be so cool. I'm definitely going to use this patch as a base for a Mega Man 2 hack I wanna work on, well done. :)