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Vertical wrap suddenly crashing the game
Forum Index - SMW Hacking - SMW Hacking Help - ASM & Related Topics - Vertical wrap suddenly crashing the game
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I have been working on a hack for a while now and i also been learning a lot about asm. That being said i ended up breaking my hack (Probably not a surprise for anybody).

Anyway i used the vertical wrap code made by kaizoman666 / Thomas, based on the patch by Noobish Noobsicle. And it worked like a charm, until recently...

I wanted to go back and modify some stuff in the level as i tend to never be satisfied with what i do. But as the level started the screen turned in a bunch of gibberish before completely crashing the game.

Take note here that i have added several patches since then so i am not sure which one caused this. The one that i think might have messed it all up is the Single screen v1.1 by TheBiob.

However i have been able to pin point which line of code cause the game to crash.
SEC : ROR $1B96 |!addr

This line allow Mario to go trough the side of the screen (At least that is what i think it does).

I have tried some stuff to try to go around this issue with no result other then making it worst or cause Uberasm to cry at me. I am now out of idea. Does anyone know what could have caused that or if there would be a way around?

It is indeed because of the Single Screen code, as both Biob and I hijack around the same area in order to open up the sides of the screen. It looks like Biob's patch should be sufficient, so a potential solution would be to just apply his for the hijack and not the "VertWrapPrep.asm" file included with mine. Then, open up the VertWrap.asm file and change this line:

SEC : ROR $1B96|!addr


LDA #$AC : STA $1B96

If you've already patched mine, you can unpatch it with this:

org $00E991
	REP #$20
	LDA $7E

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Thank you for the fast reply it is now working like a charm. Thank you for taking the time to answer a noob like me. Your work is greatly appreciated.
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