Release Date: Oct 31, 2018
Author: Scyzer
Type: Assembly
Rating: Star Star Star Star Star
[download] .asm file (73 downloads)
Game: SM
Lets Samus keep her momentum when landing from a fall or from jumping. By default, you must be spin jumping, running, and have speed booster equipped to keep momentum when landing, but with this patch it is very easy to remove any or all of these requirements. Please see the instructions in the .asm file.

Note: The original speedkeep patch was based on a hex tweak found by DSO and Rakki, which had a glitch which was fixed by cauuyjdp with help from PJBoy's docs, uploaded by MetroidNerd#9001. This current version, which is simpler, more customizable, and uses roughly the same amount of space, was rewritten by Scyzer, with further bugfixes and notes added by Nodever2 as of 5-15-2022. It has since been updated with a fix for a glitch where Samus becomes stuck when grappling an enemy when this patch is applied on 6-26-2023 by OmegaDragnet7. Thanks to all who were involved.
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Ratings and Reviews
By MetroidNerd#9001 on Mar 09, 2023 (Star Star Star Star Star )
I've always been a fan of speedkeep, so having a full, optimal version of it come out of the original hex tweak is super nice. Makes running around very smooth, and can lead to some fun speed booster puzzles if you're clever enough.
By OmegaDragnet9 on Jun 20, 2023 (Star Star Star Star Star )
I've been relying on the 4 hex edits for momentum keep for quite a while. Only recently have I noticed the pixel moving, and that has really bothered me for a few weeks.

This is better in every regard. Smooth as butter. You can even duplicate awesome Project Base fast moonwalk if you engage it after landing from a jump while speedboosting.

I had to repoint freespace to $90F7A0 (to keep from conflicting with Black Falcon's Spinjump Restart and Morphroll.)
By Oi27 on Jun 20, 2023 (Star Star Star Star Star )
it works! Fixes some bugs (annoying pixel forward when landing) introduced by the hex tweak version of speedkeep.
If you want it in your hack, this is the way to do it!

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