emulator/PLAN.md: run the unported DOS Rel 4.10 games in the
surviving cockpits via a DOSBox-X fork with an HLE device
impersonating the Division VPX board at its C012/B004 link
interface (I/O port 0x150 per BTLIVE SETENV.BAT), rendering the
frame stream in OpenGL. Cockpit RIO (COM1) and plasma (COM2) pass
through to the game's original serial drivers (L4RIO.CPP).
Eight phases with acceptance criteria, evidence table, protocol
appendices, risks, and test strategy. Gauge displays deferred.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
