Re: Launching EQW on a 48
- From: Saturn rising <nyet@xxxxxxxxx>
- Date: Sat, 03 Nov 2007 19:49:46 -0500
Arnaud Amiel wrote:
> I have played in the last few days writing a USR RPL program
> which is trying to show up an equation
> using the built in equation writer of the 48.
Do you mean to display (and edit) an existing algebraic,
the same as when pressing the down-arrow key?
That general "display anything in best view" function,
made available as new UserRPL command EDITB in HP49/50 series,
is performed by SysRPL entry point "ViewLevel1"
(ROM address #42D46h in old HP48[S/G] series only),
and works on formulas by invoking the Equation Writer
(in HP48 this displays first, then edits after pressing ON).
Thus, to add an EDITB command to an old "48"
\<< #42D46h SYSEVAL \>> 'EDITB' STO @ old HP48 series only!!!
If you want only to view it as a graphic image, without editing,
0 \-> GROB creates an "equation writer" picture of a formula,
which then may be displayed via \->LCD 3 FREEZE
or PICT STO { } PVIEW etc. (or Jazz/EdVV command VV etc.)
"ViewLevel1" is not phased by any object type,
nor even by an empty stack,
so you don't have to pre-check anything
(except for accurately typing the hex address :)
For anyone interested,
the corresponding plain EDIT (always as "text editor")
is "EditLevel1" -- #42D32h on old "48"
-=-=-=-
.
- References:
- Launching EQW on a 48
- From: Arnaud Amiel
- Launching EQW on a 48
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