Hello. I come with Alpha #2 of the ER-301 firmware. I’ve been able to verify this against the ER-301 firmware above with my modded ER-301. All works according to plan.
The primary fix (although there was some internal reshuffling to enable it) is to support up to 600 (!!!) virtual outputs across the three addresses (300 TR and 300 CV across 0xB0, 0xB1, 0xB2).
Download the latest ALPHA firmware (with all of the caveats of above) here:
teletype.SCALPHA2.hex.zip (141.1 KB)
I’ve just a few more tweaks before submitting this to @scanner_darkly for inclusion in his build.