/*
 * TODO en plus des commands hp28s
 */
general:

entry:
- parse en entier la ligne de commande puis si pas de pb de syntaxe entrer
- entrée sur plusieurs lignes
- entrée d'une variable sans '' = rcl
- rpn <"commande entière">

commands:
print
system
alias
alt-R + recherche ?
date / time

/*
 * FONCTIONNALITES en plus de celles marquées '*' dans la liste HP-28s commands
 */
verbose augmenter / diminuer la verbosité
vars lister les variables
erase effacer toute la stack

/*
 * HP-28s commands
 *
 * STACK
 *  DROP*, SWAP*, ROLL, DUP*, OVER, DUP2*, DROP2*, ROT*, LIST->, ROLLD, PICK*, DUPN, DROPN, DEPTH*, ->LIST
 * 
 * STORE
 *  STO*, RCL*, PURGE*, STO+, STO-, STO*, STO/, SNEG, SINV, SCONJ
 * 
 * MEMORY
 *  MEM, MENU, ORDER, PATH, HOME, CRDIR, VARS, CLUSR
 * 
 * ALGEBRA
 *  NEG*(+), COLCT, EXPAN, SIZE, FORM, OBSUB, EXSUB, TAYLR, ISOL, QUAD, SHOW, OBGET, EXGET
 * 
 * STAT
 *  ∑DAT, ∑PAR, ∑+, ∑-, N∑, CL∑, STO∑, RCL∑, TOT, MEAN, SDEV, VAR, MAX∑, MIN∑, COL∑, CORR, COV, LR,
 *  PREDEV, UTPC, UTPF, UTPN, UTPT, COMB, PERM
 * 
 * PRINT
 *  PR1, PRST, PRVAR, PRLCD, CR, TRAC, PRSTC, PRUSR, PRMD
 * 
 * CONTRL
 *  SST, HALT, ABORT, KILL, WAIT, KEY, BEPP,  CLLCD,  DISP,  CLMF, ERRN, ERRM
 * 
 * BRANCH
 *  IF*, IFERR, THEN*, ELSE*, END*, START*, FOR*, NEXT*, STEP*, IFT, IFTE, DO, UNTIL, END, WHILE, REPEAT, END
 * 
 * TEST
 *  !=*, >*, >=*, <*, <=*, SF, CF, FS?, FC?, FS?C, FC?C, AND, OR, XOR, NOT, SAME, ==*, STOF, RCLF, TYPE
 * 
 * CATALOG
 *  NEXT, PREV, SCAN, USE, FETCH, QUIT
 * 
 * UNITS
 *  CONVERT
 * 
 * CURSOR
 *  INS, DEL, ← → ↑ ↓, STD, FIX, SCI, ENG, DEG, RAD, CMD, UNDO, LAST, ML, RDX, PRMD
 * 
 * TRIG
 *  PI*(+), SIN*, ASIN*, COS*, ACOS*, TAN*, ATAN*, P→R, R→P, R→C, C→R, ARG, →HMS, HMS→, HMS+, HMS-, *D→R, *R→D
 * 
 * LOGS
 *  LOG*, ALOG*, LN*, EXP*, LNP1, EXPM, SINH*, ASINH*, COSH*, ACOSH*, TANH*, ATANH*
 * 
 * SOLV
 *  STEQ, RCEQ, ISOL, QUAD, SHOW, ROOT,
 * 
 * PLOT
 *  PPAR, STEQ, RCEQ, PMIN, PMAX, INDEP, DRAW, RES, AXES, CENTR, *W, *H, STO∑, RCL∑, COL∑, SCL∑, DRW∑, CLLCD, DIGTIZ
 * 
 * CUSTOM
 *  MENU, CUSTOM
 * 
 * integration, differentiation, flags, reserved variables, system operations
 */