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Ángel Martin · (This post was last modified: 09-06-2019 07:40 AM by Ángel Martin.)

(09-01-2019 08:01 PM)hth Wrote: The changed keyboard and display trick is really done by the I/O poll vector (and partial key sequence parsing), but unfortunately the HP-41 firmware skips calling the I/O poll vector when it is in the hurry, so the changed behaviour needs page 4 to make it reliable.

That's quite something, I'd've thought the I/O_Standby event was infallible!
Also there's no I/O poll from page 4, so your solution really feels mysterious (as well as fantastic!) to me ;-)