Anyone with a TI-89 should check out http://paxm.org/symbulator/download/rpn.html.
It provides RPN for the TI-89 and also has an option for 86 style bar menus.
It's by far the single most useful program I have on my 89.
"A common mistake people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools." - Douglas Adams
Anyone with a TI-89 should check out http://paxm.org/symbulator/download/rpn.html.
It provides RPN for the TI-89 and also has an option for 86 style bar menus.
It's by far the single most useful program I have on my 89.
"A common mistake people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools." - Douglas Adams