HP Forums

XRPN s now available in version 1.2. You can now easily install the programming language with: .

From the documentation:

Quote:XRPN is a superset of FOCAL (Forty One CALculator Language). The bulk of the documentation is found in the user manuals for the HP-41CX calculator (Vol 1 & Vol 2).

XRPN accepts both the original HP-41 command and also the XRPN format. Since XRPN has a limit on certain characters used in the commands, the system internally converts some of the HP-41 commands to the XRPN equivalent. While the internal functions/commands in XRPN are lower case, you are free to write them in UPPER, lower or CaMeL case as you wish.

Full documentation is available here

Version 1.3 just out.

It now has descriptions for every command in debug mode. Just fire up XRPN, put the command name in Alpha and enter CMDHELP (e.g. "LASTX" and then CMDHELP will show "Get content of Last X (L register) to X".

Also, history is retained in debug mode. Just use UP/DOWN keys to traverse the command history.