?TERMINAL reads CONSOLE-STATUS; KEY polls it until a character is pending and then takes it from CONSOLE-RX. Executed on the golden model at both cell widths, including a transcript of the v3 binary, and KEY shown still waiting after 5000 instruction words with no input. v3's KEY returned -1 at the end of its input; here KEY waits. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>