PiISA / PiGUS

ISA card emulation on the Raspberry Pi Pico's RP2040 microcontroller, and Raspberry Pi 3, 4, and CM4. Initially focusing on Gravis Ultrasound (GUS) sound card emulation.

This is a work in progress in the experimentation phase. It can emulate a GUS and produce sound but things are nowhere near perfect! Please see the Wiki for current status.

See/hear it in action on YouTube:

For Raspberry Pi Pico:

For "big" Raspberry Pi:

Credits

The Raspberry Pi Pico project uses:

• Raspberry Pi Pico C/C++ SDK
• pico_audio_i2s from pico-extras
• stdio_async_uart from PicoCart64
• gus.cpp from DOSBox-X
• OPL/AdLib emulation from rp2040-doom

The Raspberry Pi project uses:

• circle
• circle-stdlib
• gus.cpp from DOSBox-staging
• Initial PCB design and AdLib emulation based on RPiISA

License

The hardware portions of this repository (hw/, hw-pico/ directories) are licensed under the CERN OHL version 2, permissive.

The software portions of this repository (sw/, sw-pico/, pgusinit/ directories) are licensed under the GNU GPL version 2.