.;A Quick Interactive d/BASIC calculator and evaluator
.title QCALC
.H _
.U !

   _QCALC_ is an extremely powerful _d_/_BASIC_ expression evaluator.
   It can be used as a simple calculator or a full _d_/_BASIC_ expression
   evaluator. 

   _Numeric_ expressions and/or _String_ expressions can be evaluated.
   
   To evaluate string expressions preceed all input with a _$_.
   Example:

        >_$parse("A B C D")_

   _QCALC_ supports its own variable structure. Variables that may be
   used on expressions are named with a single letter optionally followed
   by a number from _0_ to _1023_. Letter case is ignored.

   Numeric variables are specified by the use of a letter.
   Example:
   
        _A0_
        _Z120_
\

   String variables are specified by the use of a _$_ after the letter
   variable.
   Example:

        _A$1_
        _z$120_

   String variables may be up to _32_ characters in length.

   _QCALC_ stores up to _10_ lines of retrievable input. Previous input
   lines  can recalled by pressing the _up_ (^K) or _down_ (^J) arrows.

   _QCALC_ uses the _d_/_BASIC_ _EVAL_ and _SEVAL_ functions to perform
   all evaluations. Therefore _QCALC_ will evaluate most _d_/_BASIC_
   expressions. Example:

        >_a = 123456+654321_
        >_if a > 10 then b = 25 else c = 50_
        >_$ljust$("AMUS", 20)_
        >_juliantodate(2448528)_
\

   _QCALC_ also some options that can be set or toggled. The option
   window can be displayed by pressing the _F7_ function key.

 _Turn BASE Display ON/OFF_

        _Octal_, _Hex_ and _Binary_ bases are usually displayed for all
        NUMERIC evaluations. Selecting this option from the option
        window will toggle the base display _on_ or _off_.

 _Set all input for NUMERICS or STRINGS_

       Normally all input is evaluated as a _numeric_ expression unless
       preceeded by a _$_ which will then evaluate the expression as
       a _string_. Selecting this option from the option window will 
       toggle between NUMERIC and STRING mode. In _NUMERIC_ mode all
       input will be accepted as a numeric expression unless preceeded
       by the _$_. In _STRING_ mode all expressions will be evaluated
       as a STRING and the _$_ is not required before the expression
       to be evaluated.
\
 _Normal Display for Bases_  

       All base displays will be displayed _normally_.

       Result: _42949672_
          Hex: _28F5C28_	
        Octal: _243656050_
       Binary: _10100011110101110000101000_

        Pressing _F1_ from input mode will also set _Normal_.

 _Word Display for Bases_ 
	
        All base displays will be seperated into two _word_ displays.

        Result: _42949672_
           Hex: _28F         5C28_	
         Octal: _1217        56050_
        Binary: _1010001111  101110000101000_
	
        Presssing _F2_ from input mode will also set _Word_.

 _Byte Display for Bases_

        All base displays will be seperated into four _byte_ displays.

        Result: _42949672_
           Hex: _2   8F          5C         28_
         Octal: _2   217         134        50_
        Binary: _10  10001111    1011100    101000_

        Pressing _F3_ from input mode will also set _Byte_.

.