Pachi Com is a Japan-exclusive pachinko game for the Nintendo Entertainment System.
This game is well-known for an angry hidden message left in by Y.S., one of the game's programmers.
In one section of said message, Y.S. mentions that the "previous" sounds can be re-enabled by changing a few bytes at certain addresses.
This hack applies said changes. The difference is most notable on a sound effect which only uses the triangle channel - the pitch is lower after applying the changes.
You will need an IPS patch installer to patch the rom such as
http://www.romhacking.net/utilities/240/.
Database match: Pachicom (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: C52A70A1A0CCCEC9BBC6A7D04C9C597FB9109F74
File CRC32: 1DD60E53
ROM SHA-1: EFE9DD039206C59420ECD58436EF0CD8E640E30C
ROM CRC32: E30B2BCF