newRPL: [UPDATED April 27-2017] Firmware for testing available for download

[rprosperi]

(10-29-2015 12:00 AM)Han Wrote:  Here's how it currently works:

1. On the HP48, with nothing in the command line (i.e all you see is the stack) pressing [RS] [A] (or [RS][F1] on the HP50G) would recall the contents of the variable corresponding to the [A] key or [F1] key. And pressing [LS] [A] while an object is in level 1 would replace the content of the corresponding variable with the object on the stack.

2. If the command line is active, then the command line is terminated (as if one were to press ENTER) and then the same (as described above) would apply if not in programming mode. Otherwise if programming mode is active then #3.

3. On the other hand, if the command line is active, and in programming mode (e.g. inside << >>), then pressing [RS][A] would merely type in 'VARNAME' RCL (where VARNAME is the actual name of the variable corresponding to the [A] key). This is what I mean by typing aid. The command line is not terminated and continues to stay active for further editing (presumably a program).

My proposal leaves #1 and #2 as-is. My proposal would, however, eliminate #3 so that [RS][A] would have a different behavior (i.e. either preview the contents of VARNAME, or actually recall it directly into the command line -- maybe the latter since that behavior would more closely resemble #3). This would apply to both programming entry as well as algebraic entry or whichever mode people prefer.

Thanks for the detailed comments and breakdown by mode. I understand now what you are suggesting - recalling the variable's current value and inserting into the program being entered indeed is analogous to the proposed 'trailing dot' notation's meaning, i.e. immediate evaluation. Neat.

Thanks for the patient comments and explanation.