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✅ = done, 📝 = work in progress, 💭 = still to be done
✅ Design prototype PCB
✅ Source parts & build prototype PCB
✅ Create ISA bus interface code in PIO
✅ Copy over GUS emulation code from sw/ directory and adapt to PIO programming model
✅ Implement port-only emulation of GUS
✅ Optimize GUS emulation to achieve 14 channels at 44.1KHz audio output
✅ Speed up PSRAM access to be fast enough for GUS sample playback
✅ Implement IRQs
✅ Implement sample upload via DMA
✅ Design release candidate PCB
✅ Fabricate and test release candidate PCB
✅ Complete AdLib support
✅ Better IRQ support
📝 Better DMA support
📝 Implement MPU-401 emulation and MIDI out on Pico UART
The current version of the board design is what I'd consider a "beta". I have fabricated it and have done quite a bit of testing on it. However, produce boards at your own risk!
Compatibility of various demos, trackers, players, and games are at the Compatibility list page.