Super Mario Bros. 3: SMB3 - Sound Effect Fix is a patch for the Nintendo Entertainment System that corrects a bug affecting the 1up sound effect. By changing a specific instruction, the patch ensures that the sound is properly masked by other byte-defined sound effects like the Raccoon tail wag. The modification is based on the SMB3 disassembly and requires an IPS patch installer to apply.
This patch fixes the bug notably known for causing the "Extended 1up Sound Effect". It changes a single instruction (STY to STA) so that the 1up sound effect is correctly masked out by the byte-defined sound effects (e.g. Raccoon tail wag).
Hacking was done by modifying the SMB3 disassembly provided by (captain)southbird.
You will need an IPS patch installer to patch the rom such as http://www.romhacking.net/utilities/240/.
Database match: Super Mario Bros. 3 (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: A03E7E526E79DF222E048AE22214BCA2BC49C449
File CRC32: 85A79D9C
ROM SHA-1: A611B90B4833B20A364BF06EE3BE3B9093EA4DF9
ROM CRC32: A0B0B742
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