Craig, I see... the thing about X,Y,Z,T is that some HP calculators have only 4 stacked register with some tricks with X,Y and T always rolling. My little stack is limited only by the memory available. I am trying to shoehorn the rolling T right now...
I just read http://www.hpmuseum.org/rpn.htm to have some clear mental picture of how x,y,z,t behave and also R dn, Last X and CLx I think I can create something here... :-) ho ho ho my little RPN calc is growing. On Wed, Oct 13, 2010 at 6:07 PM, <dunb...@aol.com> wrote: > Andre. > > The whole point of registers is that data entry is naturally terminated by > either an "enter" or an operator. The data is loaded, and waits for the > user > to command it. This is unlike an algebraic (or operator prefix) system > where the operator is entered between the operands, and therefore the > process is > locked into a prescribed state. You cannot change your mind, and add, > instead of multiply, those two numbers you are interested in. The four > register > stack permits any number of levels of nested, complex chain calculations. > This requires a separate temporary register in a prefix system. > > But you know all that. I just think that a register based gadget would be > easier to author than any other, and you could make it so those registers > are > visible, if you wanted to. Like that calculator I cannot remember... > > Craig > > > In a message dated 10/13/10 4:47:53 PM, an...@andregarzia.com writes: > > > > Craig, > > > > Just added a new revision to RevOnline, now there is a negate button and > > the > > minus sign behave as expected (by executing the operation) > > > > the switch and rolldown button would depend on me having registers which > I > > don't right now. There is "swp" which swaps the last two entries in the > > stack. > > > > Will find out how hard it is to have some HP like registers. > > > _______________________________________________ > use-revolution mailing list > use-revolution@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-revolution > -- http://www.andregarzia.com All We Do Is Code. _______________________________________________ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution