I'd be interested in some additional information regarding the outcome of pressing a key when a program is running on the HP67, HP25C and HP29C in the table below.
HP25C : Unknown - same as HP67?¹ After the current instruction (incuding a PAUSE).
HP29C : Unknown - same as HP67?
HP67A : I beleive that all keys except R/S are ignored, except that digits can be entered while the program paused.
(What about CHS and EEX or any other functions?)
HP33C : Any key halts a running program¹
HP34C : Same as 33C (from memory).
HP11C : Any key halts a running program¹
HP10C : Same as 11C (from memory).
Many thanks.
Mike T.
Edited: 7 Apr 2008, 8:47 p.m.