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Super Mario Bros. Special for NES - Unused Spiny Egg Behaviour

Hack of Super Mario Bros.

Description:

This is an IPS patch intended to restore the presumed original Spiny Egg behaviour to this hack, as an optional feature, much the same as the patches already existing for the NES version of Super Mario Bros. and the FDS version of Super Mario Bros. 2.

This replaces the hex values found in the “Super Mario Bros. Special for NES” image of…

20 FF C2 A0 02 95 58 C9 00 30 01 88

…with…

A0 02 95 58 C9 00 30 01 88 20 FF C2

…which re-enables the unused horizontal movement logic.

The eggs were supposed to be thrown out relative to the player’s speed, Lakitu’s speed, the player’s position, and a pseudorandom value, as well as bounce off of any blocks or walls that they hit on the way down.

This optional patch is intended to be used in conjunction with TRIFORCE89’s “Super Mario Bros. Special for NES” hack, not in place of it. This addendum patch is to be applied after applying the original patch.

ROM / ISO Information:

  • Super Mario Bros. Special (Japan, USA) - v2017114.nes
  • MD5: 828DAE7554BE1967AFD437FE28E059D4
  • Super Mario Bros. Special (Japan, USA) - v2017325.nes
  • MD5: C8F5EF6E907303D1016A58FBAD90254D

Links:

Screenshots:


Credits:

Credits
ContributorType of contributionListed credit
KoohiisanOriginal Workwrite-up of implementation for SMB2j, adapted here
TRIFORCE89Original WorkSuper Mario Bros. Special for NES

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