HP 50g questions

[Joe Horn]

(03-28-2019 01:49 AM)TravisE Wrote:  In fact, there are several other keys that change their behavior depending on whether you press and release the shift key or keep it held down while pressing the other key. ...

34 of the 50g's built-in press-and-hold key combinations are listed in Appendix G ("Keyboard Shortcuts") of the Advanced User's Reference Manual. I think the only one missing is the three keys B, C, and D, which, if held down throughout a warmstart, puts the 50g into "Smart Mode" (RPN and a few other settings). This unsupported feature was added during product development by Cyrille de Brebisson for his own use, and he nicely left it in for the rest of us to use. He chose those three keys not because BCD stands for Binary Coded Decimal, but because they are his own initials.