(Comp.sys.handhelds) Option: 
Item: 924 by cloos at acsu.buffalo.edu
Author: [James H. Cloos]
  Subj: Re: ->PRG & PRG-> RPL Versions
  Keyw: 
  Date: Thu Oct 18 1990 12:02 
 Lines: 51

In article <8979@helios.TAMU.EDU> Rick Grevelle posts the 2 programs
\->PRG and PRG\->.  He also mentions the addresses of routines to do
\->ALG, plus that the routine used to do PRG\-> also will break up an
algebraic or a list.  We already have LIST\-> and \->LIST, he gave us
PRG\-> anmd \->PRG, so here, based on his routines (to check for args,
etc.) are ALG\-> and \->ALG.

These routines work exactly like those Rick posted; the decomp is:

ALG\->
02D9D   :    ::
18AB2   :    need one arg from stack
18FB2   :    check one argument for following type
04049   :    <9h>
1C973   :    program->, algebraic->, list->
0312B   :    ;

\->ALG
029D9   :    ::
18C34   :    need % n arguments from stack {% n == real_n}
0546D   :    ->algebraic
0312B   :    ;

Now, in the start of his article, he listed 0x054AF as the address of
the alg,list,prg-> routine, but used 0x1C973 in his programs.  I used
the 0x1C973 as I didn't notice this at first; it does work, though,
with algebraics.

With these, you can easily convert between algebraic and rpn display
formats; this could be helpful in understanding rpn if you don't
already.

(Please backup before playing with, just in case.)

-JimC
--
James H. Cloos, Jr.         Phone:  +1 716 673-1250
cloos@ACSU.Buffalo.EDU      Snail:  PersonalZipCode:  14048-0772,
cloos@ub.UUCP