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A Modern Replica of the Legendary ISA Sound Card

Beavis Ultrasound PnP

schlae / GitHub

Hacker News • 55 Points

02

The Legacy

Understanding the Gravis Ultrasound phenomenon

Sound Card Evolution

1992
Gravis Ultrasound Born

Advanced Gravis releases the original GUS, revolutionizing PC audio

1994
PnP Version Launch

Plug and Play ISA variant simplifies installation for users

1990s
Golden Era

GUS becomes legendary for DOS gaming and tracker music

2020s
Beavis Replica

Open-source recreation preserves hardware legacy

Project Highlights

  • 01
    Open Source Design Complete schematics and PCB files available on GitHub
  • 02
    Hardware Accurate Faithful recreation of the original GF1 chip functionality
  • 03
    Modern Manufacturing Uses contemporary components while maintaining ISA compatibility
  • 04
    Community Driven Active development with contributions from retro computing enthusiasts

Technical Features

memory

GF1 Compatible

Recreates the Gravis Ultrasound GF1 sound processor

audio_file

32 Voices

Supports 32 concurrent voices with hardware mixing

storage

Onboard RAM

Expandable memory for sample loading and MIDI

settings_input_component

ISA Interface

Authentic ISA card form factor and connector

piano

MIDI Support

Full MIDI implementation for music production

gamepad

DOS Gaming

Perfect for authentic retro gaming experience

Original vs. Beavis Replica

Original GUS PnP
  • Discontinued hardware
  • Expensive on eBay
  • Aging capacitors
  • Limited availability
Beavis Replica Recommended
  • Open source design
  • New manufacturing
  • Fresh components
  • Community supported
The Gravis Ultrasound wasn't just a sound card—
it was a piece of computing history that defined
an era of PC audio excellence.
Retro Computing Community

Explore the Project

github.com/schlae/BeavisUltrasound

Open Source • Hardware • Preservation
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