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D70-Rosetta-Os, image 1 from its README
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D70-Rosetta-Os

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WIP: Rosetta OS for the Roland D-70, a step-by-step replacement for the stock firmware. Today it patches v1.11 with a Hex girl boot animation, a BIOS-style ROSETTA menu, common sliders and the demo re

D70-Rosetta-Os is a mod for the Roland D-70, by @yuyoi. Latest release v0.6 (October 2026).

forRoland D-70·by@yuyoi

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Download v0.6

RosettaPatcher-D70.exe· 28 MB

Custom license· yuyoi/D70-Rosetta-Os·downloads come from the creator’s GitHub releases

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8 commits and 1 release in the last year
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  1. v0.6Rosetta OS v0.6 + Rosetta PatcherLatest1 file

    Rosetta Patcher for Windows: pick dumps of your own D-70's v1.11 EPROMs (IC4 + IC9, either order, or one combined 128 KB file; not included), and it builds D-70 Rosetta OS v0.6: two 27C512 images to burn (IC4 even, IC9 odd). Every build runs the full check set first (a few minutes). Keep your original chips; hold EXIT at power-on for the plain D-70.

    v0.6:

    • DLM page with a live view of the loop slice
    • WAVE sweep through every wave with its name; EFFECTS page reloads the effects chip
    • arpeggiator: up / down / up-down / random, 1-4 octaves, tempo, hold
    • MIDI OUT page: key mode, split, velocity, per-section channel, program, volume, transpose, zone
    • Alpha Dial in every menu, sliders keep working in the menu, KNOB LOCK (SETTINGS): slider 1 keeps the parameter it grabbed
    • EFFECT/CTRL and MIDI OUT buttons open the Rosetta pages
    • stock tone / rhythm / effector / MIDI / data-transfer screens cut (4 KB), their menu numbers open Rosetta instead
    • Hex girl boot drawn at 2x

    Do not share the built .bin files: they contain Roland code. Share the patcher instead.