Applying IPS patch on already patched rom?

[komawoyo]

Is is possible to apply this patch over an already patched rom? I have a rom that supports 2 player mode.
(https://www.romhacking.net/hacks/1013/)

[ejona86]

Cross-linking ejona86/taus#28. In short: sometimes you can, but not in this case. There are some changes necessary to hook into the built-in twoplayer support, and then there's a problem of the two mods using the same space for their code.

[ejona86]

Oh, this is linked to Tetris Zero, not the taus twoplayer mod. I've not looked into how the Tetris Zero ROM operates, but it is much larger and than the taus twoplayer mod and does overwrite some of the same sections as the hard-drop ips (which means incompatible).