Phosphoneo is a Neo6502 emulator that runs the firmware's own code: it lets you test programs without the board.
Status In development · v0.5.0
In the line of Phosphoric, Phosphoneo is a reference emulator of the Neo6502: cycle-stepped, 65C02 core 100% validated on the SingleStepTests test suite (2.54 million cases), firmware API linked from the official code, deterministic tooling (running without a display, captures, auto-typing, traces, save states). NeoBASIC boots there without a display, and its captures match those of the official emulator.
Source code not published yet.
Porting Astéroric (a study clone of Asteroids for the Oric-1) to the Neo6502: arcade logic kept, XOR rendering through the firmware API, half-open lines, 16-bit coordinates, 30 Hz, HID keyboard, 4-channel sound, the cc65 OptStackOps case, bit-for-bit tests in Phosphoneo — then the tests on a real board. Read the article →
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