Beavis Ultrasound PnP ISA Sound Card Replica

The Beavis Ultrasound PnP is an open-source replica of the Gravis Ultrasound sound card that includes complete schematics and reverse-engineered GAL source code. The design centers around the AMD InterWave chip (AM78C201) and is a 4-layer board measuring 8.2 x 4.2 inches, though the creator notes it has not been fabricated or tested for functionality yet. Assembly allows for substitutions of components like op amps and ferrite beads, with detailed notes provided for builders.