Q-Bert does not work (PRG and CRT)

[sy2002]

Reported by @dansanderson here https://github.com/MEGA65/mega65-core/issues/778#issuecomment-1909362620

"Q-Bert: player select works, then screen goes black

Same behavior on R3, might be a bad cart."

Since it also does not work on R3, this is not blocking the V5.1 release.