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SM1 audio driver ROM found on a 1FZS board.

SM1 is the name of the 64kB M1 ROM containing the default sound driver embedded in some NeoGeo MVS systems. It allows testing of the audio without having a cartridge inserted.

Dump name: SM1.SM1 in BIOS sets. Signature:

Ver 1.5b by Mr.Pac h Ber.02/01/08

Same pinout as 27C1000A.