OAM DMA hijacking: Difference between revisions

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Revision as of 12:32, 8 November 2022 (view source) glitchcitywiki>Evie (Torchickens) No edit summary ← Older edit		Latest revision as of 06:29, 30 April 2024 (view source) Evie (Torchickens) (talk \| contribs) (→‎Taking over the joypad)
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Line 3: {{clr}} '''OAM DMA hijacking''' ('''Object ~~Allocation~~Attribute ~~Map~~Memory Direct Memory Access hijacking''') is a means of changing the OAM DMA routine at FF80-FF89 (though the actual end can be extended e.g. FF89 could use two bytes for a relative jump, in which case FF8A is occupied) in Game Boy games by glitching or hacking. In this case, this article will describe how to do it with glitches in the Pokémon games. This glitch works by hijacking the OAM DMA routine associated with sprites.{{elaborate}} Line 52: At the desired RAM address (e.g. D34A), write: ld a,(FFD3) ; a=random "~~D-sum~~hRandomAdd" ~~byte 1~~ number. ld (FFF8),a ; put a into FFF8, which controls what buttons are being pressed. ret ; Don't execute any code after D350.