Documenting the reverse engineering efforts of my Robomow City 120
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Updated
Jun 30, 2026 - C
Documenting the reverse engineering efforts of my Robomow City 120
Custom firmware turning the Roland SP-808 Groove Sampler into a guitar looper / MPC-style sampler. Reverse-engineered H8S OS, homemade H8S assembler/disassembler tools, and disk-flashable builds that install straight from a Zip or ZuluIDE SD card. Adds MPC sample modes, looper and keyboard modes, and new menus.
Custom OS for the Roland VS-840EX: sampler / looper / synth conversion, port of the SP-808 Rosetta OS (H8S + ESP2). Discord: discord.gg/R3CQkFdRtf
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