TheReFmB1rth

TheReFmB1rth v0.1.0-beta.18 — corrective FM-1 beta

This prerelease contains the corrective hardware architecture produced after the first physical FM-1 test exposed disconnected Felucca/ReFm control paths, plus the browser/readback and runtime-diagnostic work added since beta.1.

Built from commit 5e2cc6fa89cb34241e40241054abc3433d4743e0 only after that exact commit passed host DSP/integration tests, the browser/WASM build, JieLi FM-1 target compile/link, target memory budgets, package manifest/checksum verification and the target sample link-size experiment.

Physical workflow

• dedicated 240×240 ReFm pages: HOME / ACID / STEP / DRUM / MIXER / FX / SONG / PROJECT
• physical keyboard routed directly to the selected ACID A / ACID B engine
• physical PLAY starts/stops the ReFm sequencer instead of Felucca's old audible sequencer
• fresh Pattern A contains an audible factory demonstration for immediate PLAY testing
• 16-step ACID editing with NOTE / REST / TIE, Accent, Slide and probability
• 808/909 lane editing with OFF / HIT / ACCENT
• mixer level/pan/delay/reverb plus mute/solo and master FX editing
• four project save/load slots using Felucca's CRC-checked storage
• held-note panic on editor-page/machine transitions
• target-only idle ACID fast path to reduce wasted DSP work

Browser/editor additions

• device-to-browser live state synchronization
• START / CONTINUE / STOP through the firmware MIDI realtime path
• full A–H ReFm project backup and restore using the versioned project codec, project CRC and chunked SysEx transport
• restore changes live RAM only; persistence still requires the normal FM-1 project SAVE action
• one-click read-only runtime diagnostic capture for CPU, DMA lateness and user/supervisor stack headroom
• downloadable runtime JSON compatible with tools/target_runtime_report.py

Physical beta gates shown in the browser

• zero DMA deadline misses
• sustained audio CPU <= 75%
• peak render <= 82% of one DMA-half deadline
• user-stack free headroom >= 4096 bytes
• supervisor/ISR-stack free headroom >= 1024 bytes

Install asset

• TheReFmB1rth-experimental.fwsc

Verification assets

• SHA256SUMS
• manifest.json
• target-memory.json
• refm-overlay.txt
• refm-ui-overlay.txt

Status

This remains software-gated beta firmware, not hardware-proven stable firmware. The next required step is the second physical FM-1 pass covering LCD/control behavior, live keys, Pattern A, sustained stress diagnostics, USB/TRS MIDI, USB audio, project persistence and rollback/recovery.

Keep the verified official V15/recovery path available while testing. No custom firmware has a zero-brick guarantee.