|Re: 50G Programming question|
Message #6 Posted by James M. Prange (Michigan) on 11 Dec 2007, 6:02 p.m.,
in response to message #5 by Graham Gibbs
Thanks; it's always nice to read that someone finds my posts useful.
Have you considered writing a book on User RPL? - I'll buy one!!
The trouble with that idea is that almost all of the information that I write about UserRPL is already available, either in the documentation written by HP, or in Bill Wickes's (the "Father of RPL" and a very clear writer besides) Insights books, although (at least usually) re-written into "my own words". I suggest that anyone interested in gaining in-depth knowledge of UserRPL purchase the Museum's CD/DVD set (see: http://www.hpmuseum.org/cd/cddesc.htm), which has scans of all of Bill Wickes's books about RPL, and HP's documentation for at least the 28 series and the 48SX/S. For HP's 48G series and 49 series documentation (and much additional information), try some searches at http://www.hpcalc.org/. For those more comfortable with Classic RPN, it may be better to read Bill Wickes's HP 41/HP 48 Transitions (also available as a scan on the Museum's CD/DVD set) first.
I do try to write clearly and be sure that what I write is technically correct, but I know that I have a strong tendency to be "wordy" and "ramble" into topics that have only a minor connection to what I'm trying to explain (and everything is somehow connected with everything else), so my writing is often not what I'd consider to be concise.
UserRPL commands are written (mostly) in SysRPL, with some Saturn assembly language. SysRPL commands are written using other SysRPL commands or Saturn assembly language, and ultimately it all gets down to Saturn assembly language. A good deal of information on these can be found at http://www.hpcalc.org/.
Also make it a habit to read the comp.sys.hp48 usenet group. In case you don't already use a news client, the newsgroup can also be accessed at http://groups.google.com/group/comp.sys.hp48/.