Wall Jump in Sonic 1

Looking at the game real fast and noticing it crashes in Regen, however jumping recovers from that said crash which is strange.

I also had a look at the coding, it's quite different from the method I used to add wall jumping to my own hack, however without the time limit your's has, it still has the same issue. I tested and removed the flag that puts a limit on the time he can stay on the wall, after falling past the wall he continues to stay in the wallgrabbing animation. But I guess that doesn't really matter to you since your intent was the time limit.

Anyway, nice work.

 

It crashed on real hardware if you released the D-Pad direction button of the wall you're holding on to, for example, the right wall if I'm clinged onto it and I release the right button before it's finished, it crashes.

 

You REALLY want me to make a Mighty In Sonic 1 hack, don't you? :D

Well if I can work out the ASM retools here it should hopefully not take too long (I'd still need time to make the sprites however unless anyone knows some authentic looking extra sprites for Mighty anywhere) though it will likely still have the hardware incompatablities listed for this ROM here. I was also wondering if Sally should have a wall jump in her hack, since she is an agility based character do you think it suits her gameplay? (if anyone can make a Projectiles in Sonic 1 hack that would be useful too...just sayin' lol).

Thanx Mercury. :D

 

mmm I just can think on the Mighty sprites from Chaotix...
and yes please :D Make Sally walljump. I think I'm gonna make Stella walljump as well since is something I wanted since the beggining

and yeah, thx Mercury for the guide

 

I have seen a recurring sheet for Mighty used in hacks which is basically an expanded version of his Chaotix sheet with more Sonic 1 animations, I'm not sure if it has been publically released though.

Might be a good idea, since our characters have limited attacks they may as well have good manuevering and agility moves. Sally at this point isn't much more than a weaker version of Amy.

 

The crash happens because you are writing a word to an odd address; and it is the wrong address too, in fact. In sonic.asm, find Sonic_Control routine, local label @chkLR:

Code (ASM):

1.     @chkLR:
2.         move.b  (v_jpadhold2).w,d0  ; get jpad
3.         and.b   $2D(a0),d0  ; compare jpad to stored L,R button states
4.         bne.s   @skip       ; if still held, branch
5.         move.w  #0,$2D(a0)  ; clear wall jump flag and button states
6.         move.b  #id_Roll,obAnim(a0) ; use "jumping" animation
7.    
8.     @skip:

and replace it with this:

Code (ASM):

1.     @chkLR:
2.         move.b  (v_jpadhold2).w,d0  ; get jpad
3.         and.b   $2D(a0),d0  ; compare jpad to stored L,R button states
4.         bne.s   @skip       ; if still held, branch
5.         move.w  #0,$2C(a0)  ; clear wall jump flag and button states
6.         move.b  #id_Roll,obAnim(a0) ; use "jumping" animation
7.    
8.     @skip:

It will no longer crash (edit: and it will clear the flag as intended).

 

I can't wait for those character hacks to get their wall climbs in. Gonna be awesome.

Good that someone made this POC hack.

 

Well, I must say this is the first bit of open-source code I've actually been interested in getting my hands on. Maybe I'll use this for Mighty in 30 Day Project... =P

 

Save enhanced mighty for the 30 day project. The Chaotix sprites should be used for the Mighty in Sonic 1 hack. I prefer straight Chaotix sprite ports to original sprites in those kinda hacks. The new style may even clash with classic sonic sprites.

 

Well they will be interesting to see if that's the case. the Mighty sprites for Chaotix are not a bad fit for the original art style but they do stand out too much for my liking so I'm quite excited to see how well these custom sprites work.

 

This should use the sprite in your avatar. :v:

This is pretty damn nice, except it interferes when you jump over a rock, or a large step, sorta makes you drift off of it. That's the only thing I don't like about it, other than that, it's very good.

 

I just played the actual Sonic 1, and it happens there too. Sorry for misleading you, but it seems that there is a slight slope before a few of the rocks and steps, which make you drift backwards.

I'll suggest an improvement,instead of jumping on a wall, becoming the wall state for a short time, how abouts you make it more like in Damizean's GM engine, where you press jump while against a wall to engage the sliding, then again to jump, including while you are travelling up.

The way you've done it, you have to press against the wall and be falling to do it, making it annoying to walljump form a standstill.

 

I played the hack finally, while it's cool to have a new move, Mighty must be pretty boring if this is his only new move. Besides the sprite this is basically Mighty in Sonic 1 as I haven't heard of him having any other differences from Sonic.

 

I wish there was an emulator that could warn you about these type of errors. Right now I have a huge headache why my new game works perfect in the Gens/GS and Kega Fusion, but resets itself on real hardware.