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43s:project [2012/02/04 19:54]
pauli [Data Types]
43s:project [2012/05/14 02:17] (current)
pauli
Line 1: Line 1:
 +====== WP 43S Project ======
 +
 +===== Introduction =====
 +
 +A brain storming area for the development of the 43S calculator. ​ Just a collection of ideas and goals for the moment. ​ Everything is subject to change on a whim including the name.
 +
 +===== Goals =====
 +
 +To create the best ever RPN calculator.
 +
 +    * A feature super set of the HP-42s.
 +    * A (mostly) feature super set of the WP 34S.
 +
 +===== Technicalities =====
 +
 +    * Proper alpha keyboard like the 34S or 41C series.
 +    * Menu based or XEQ alpha based -- there will be too many functions for the keyboard. ​ Maybe both menus and XEQ alpha.
 +    * Typed values like the 42s and later RPL machines.
 +    * Fully assignable keyboard with the 41C series hold to see function, keep holding to cancel.
 +    * Less cluttered keyboard than the 34S -- fewer shift keys, less overloading and complexity in the keyboard state engine and no hot keys.
 +    * Dynamic memory allocation.
 +    * I/O of some kind (serial, USB, SD).
 +    * Modular software design to allow independent development of (native) functions.
 +    * A less limited font -- sub and superscripts for every available character.
 +
 +===== Data Types =====
 +
 +    * Reals (decimal or binary or both?)
 +    * Long reals (again decimal or binary -- leaning towards binary here to make use of lots of existing libraries)
 +    * Integers (binary integers like the 16C/34S or unlimited precisions ones like the 50g or both?)
 +    * Strings
 +    * Complex numbers
 +    * Arrays (at least one and two dimensional,​ at least real and complex)
 +    * Fractions (i.e. exact rationals)
 +    * Intervals (?)
 +    * Quaternions (?)
 +    * Units
 +
 +===== Hardware =====
 +
 +    * Likely ARM embedded system on a chip based.
 +    * Lots more memory (flash and RAM) than the 34S (128kb & 2kb respectively).
  
43s/project.txt · Last modified: 2012/05/14 02:17 by pauli