1)
Download JAZZ by Mika Heiskanen & Jan Brittenson and install it in your HP48
or use EMU48 to run JAZZ.
Jazz has documentration and explanation
about how to use it.
2)
If possible buy the book An Introduction
to HP48 System RPL and Saturn Assembly Language,
by James Donelli from Da Vinci or AMAZON
3)
Download some of the following
Tutorials from HPCALC.ORG for HP48 and for HP49.
And look for Programming in User RPL Doc by Eduardo Kalinowski
4)
Use and study the following examples:
A little more about SysRPL and ML
Area48 Site is a site for HP48/49 beginners
and intermediate users.
Maintain a site for advanced programming
is out of our purpose.
You can, however, find more about
Sys RPL in the folowing sites:
1 - http://www.hpcalc.org,
by Eric Rechlin - USA
2 - http://www.hp-souces.com,
by Jean Roger Condat - France