Z''=info:Z'''=INT(Z''*.0001):IF Z'''=>300}2
| MATHX.HLP
  Copyright 1991 By David W. Denker
  Box 115, Isanti, Mn. 55040 |
DSP nn; Sorry, this file must be used with MATHX V3.00 or greater!;n
wait20:quit
#2
title= HELP INFORMATION 
wlcc b0f14l0:mon2:goto10
#10
HEAD B0F13"  Select by the PICK LETTER or use MOUSE or  CURSOR keys."
wlcc l9
menuu b14BB1BF15I" MAIN HELP MENU 
  "!A"nswer system
  "!D"ata input
  "!E"rror messages
  "!F"unctions (math)
  "!I"nstruction line
  "!M"anual calculations
  "!O"perating environment
  "!P"riority of calculations 
  "!Q"uit help"x
j=mlvl:on(j)g{350,400,500,150,80,450,600,100}:quit
#26:head"  END help, PAGE UP, else help menu":ret
#27:head"  END help, HOME to help menu, PAGE UP, else continue":ret
#28:head"  END help, HOME to help menu, else continue":ret
#29:head"  END help, else main help menu":ret
#36:call60:if r=4}q:if r=6}q:if r<>1}r
if i>9999}}if i<10012}q:if i>10011}}if i<10021}}r=2:ret
#37:call60:if r=4}q:if r=6}q:if r<>1}r
if i>9999}}if i<10012}q:if i>10011}}if i<10031}}r=7
if i>10030}}if i<10040}}r=2:ret
#38:call60:if r=4}q:if r=6}q:if r<>1}r
if i>9999}}if i<10012}q:if i>10011}}if i<10031}}r=7:ret
#39:call60:if r=4}q:if r=6}q:if r<>1}r
if i>9999}}if i<10012}q:ret
#60
i=mloc:if i>9999}60
#61:k=kyck:if k<>0}62:I=MLOC:IF I>9999}}IF I<10079}66
i=mlin:if i=0}61:if i>99}64:if i>x-2}61:if i=j}61:j=i:goto63
#62:if k=13}65:if k=27}69
if k=272}}if j>0}}j=j-1:if k=280}}if j<x-2}}j=j+1
if k=273}67:if k=281}68:if k=271}72:if k=279}71
if k>64}}if k<91}}k=k+32:if k>96}}if k<123}70
#63:wlcc L(j):goto61
#64:i=i-int(i/100)*100:j=i:i=mloc:if i>9999}}if i<10079}66
#65:r=0:ret
#66:r=1:ret:|top bar|
#67:r=2:ret:|PgUp|
#68:r=3:ret:|PgDn|
#69:r=4:ret:|ESC|
#70:r=5:k=k-97:ret:|A to Z|
#71:r=6:ret:|END|
#72:r=7:ret:|HOME|

#80:call28:x=0:i=0:j=0
WIND r1c0wr22wc78BB1BF15B7F0" INSTRUCTION LINE  (1 of 3) 
  The instruction line is made up of seven 78 character lines wrapped 
  around to form a 546 character instruction area.  The special key
  functions for the instruction line are listed below.

     Cursor keys:  Moves the cursor around the instruction line within the
                   data that has been entered.  (Mouse can be used too.)

     HOME key:  Moves the cursor to the start of the instruction line.

     END key:  Moves the cursor to the end of the instruction line data.

     INSERT key:  Toggles between INSERT mode and OVERtype mode.  The
                  bottom information bar will display the mode you are in.

     DELETE key:  Deletes the character the cursor is on.

     Back Space key: <--  Deletes the character left of the cursor.

     F1 to F8 keys:  Inserts information as defined by FKEY statements.
                     (Does not work for an INP response.)
":call38:if r=7}10
#90:call27
wind" INSTRUCTION LINE  (2 of 3) 

     F9 key:  Inserts the last decimal answer into the instruction line.
              If responding to an INP statement, the last variable value
              or memory string will be returned if nothing is entered yet.

     F10 key:  Recalls the previous instruction line for editing. 
               (if nothing is entered on the new line yet)

     S-F1 to S-F8 keys:  Used to display environment pop-down menus.
                         (The mouse is normally used for this.)

     SHIFT-F10 key:  Display the HELP WINDOW.
                     Valid for INP statement if help window available.
                     (not valid when in a KYIN response)
                     (not valid in application or utility files)

     CTRL-X:  Clear all entered characters from the instruction line.

     ESC key:  Quits the MATHX program.  Also quits an INP response
               with no change to the variable or memory contents.
":call37:if r=7}10:if r=2}80
CALL26
wind" INSTRUCTION LINE  (3 of 3) 
 Math Instructions:
     KEY    DEFINITION                                  EXAMPLE
      +     Entering positive sign or addition.         125+258
      -     Entering negative sign or subtraction.       -15-128
      *     Multiplication instruction.                 159*X*Y
      /     Division instruction.                       Z/158
      \     Exchange and division instruction.          1.234\1
      ^     Power instruction.                          X^2
      .     Enter decimal point.                        .012*2.369
      ( )   Input parentheses.                          SIN(A+B)
      [ ]   Input exponent for scientific notation.     1.589 [-25]
      E     Alternate scientific notation form.         1.589 E-25

 Constant:  PI or π    Input Pi.             Example:   pi*6.875

 Note: After completing a calculation, if one of  + - * / \ ^  keys are hit
       first,  the preceding  calculation result  is used as  data for  the
       next calculation.  Starting with any other key,  including the space
       key, or separating the calculations with a second hit of the <enter>
       key,  will  cause  the  program  not  to  use  the  preceding result.
":call36:if r=2}90:goto10
#100:call29:x=0:i=0:j=0
wind r1c0wr22wc78BB1BF15B7F0" PRIORITY OF CALCULATIONS 
  Calculations are done from the left to the right with some exceptions.
     Functions have priority over power.
     Power has priority over multiplication or division.
     Multiplication or division has priority over addition or subtraction.
     Calculations in parentheses will occur first.  For multiple
        parentheses, calculations in the innermost parentheses have
        priority over all others.
     Compound functions are calculated from right to left.
        example (LOG SIN DEG 12.3456)
     A string of powers are calculated from right to left.
        example (x^y^2)
     Example of order of calculations:
                1.2 + PI * SQR 2 - LN TAN (10+25) ^ 2 / SQR 5
                 │    │    └ 1 ┘   │   │   └ 4 ┘    │   │   │
                 │    └── 2 ─┘     │   └─ 5 ─┘      │   │   │
                 └── 3 ───┘        └── 6 ─┘         │   └ 8 ┘
                     │                 └───── 7 ────┘     │
                     │                        └──── 9 ────┘
                     └──────────── 10 ──────────────┘
":call39:go10
#150:call28:x=0:i=0:j=0
wind r1c0wr22wc78BB1BF15B7F0" MATH FUNCTIONS:  (1 of 3) 

  SIN       Trigonometric function Sine.
  COS       Trigonometric function Cosine.
  TAN       Trigonometric function Tangent.
  ASN       Inverse trigonometric function sine.
  ACS       Inverse trigonometric function cosine.
  ATN       Inverse trigonometric function tangent.
  SINH      Hyperbolic Sine function.
  COSH      Hyperbolic Cosine function.
  TANH      Hyperbolic Tangent function.
  ASNH      Inverse Hyperbolic Sine function.
  ACSH      Inverse Hyperbolic Cosine function.
  ATNH      Inverse Hyperbolic Tangent function.
"nnnnnnn:call 38:if r=7}10
#160:call27:wind" MATH FUNCTIONS:  (2 of 3) 

  ABS       Absolute value.
  DEG       Degree.minute second to decimal conversion.
  DMS       Decimal to degree.minute second conversion.
  EXP       Exponential function of e.
  LN        Natural logarithm. (base e)
  LOG       Common logarithm. (base 10)
  CINT      Integer. (by rounding the fractional portion)
  FIX       Integer. (truncated integer)
  INT       Integer. (next lower integer)
  SGN       Signum.  (result is 1 if positive, 0 if zero, -1 if negative)
  SQR or √  Extraction of square root.
  RAND      Generate a random whole number from 0 to 99.  Does not need any
            other information or seed.  Wherever RAND is encountered, a
            random number will be used in its place.
               Example  RAND*100+RAND

  NOTE:  All two or three letter functions must have a space
            between the function and a variable or other function.
":call37:if r=7}10:if r=2}150
call26:WIND; MATH FUNCTIONS:  (3 of 3) 
  F$A to F$Z    Special definable functions using a string memory as the
                definition of the function.
                  Format:  F$letter expression
                  Example 1:  $Z="2*Z^2+4*Z-16":F$Z 5
                     Wherever Z is in the definition of $Z, the value
                     5 will be put in its place to obtain the result of
                     F$Z for 5.  Note: variable Z is not required in the
                     definition and if not used, 5 would be a dummy value.
                     A dummy value is required but not used.
                  Example 2:  $x="x^2+x+1":$y="y^3+y^2+y+1":F$X F$Y 6
                     Here two functions are defined and the result of the
                     F$X for F$Y for 6 will be displayed.  (F$Y for 6 is
                     done first)
                  NOTE!  When the variable used in the definition of a
                     function is the same as the defining string letter,
                     that variable is temporarily given the value of the
                     function expression.  The old value of that variable
                     is saved.  All other variables are not affected and
                     can be used in the definition if needed.
;:call36:if r=2}160:goto10
#350:call28:x=0:i=0:j=0
wind r1c0wr22wc78BB1BF15B7F0" ANSWER SYSTEM  (1 of 2) 

  The MATHX programs can display answers to problems or  values  of
  variables  in  two  forms.    Normal decimal form and Hexadecimal
  form.


  Hexadecimal form:
      This is done by using the  DSP,  PRN,  or the DPRN statements
      and the  H  sub-statement.    Example:  1000*256:DSP H.  This 
      display sub-statement displays the answer in Hex form for the
      previous math expression.   The  Hex  answer for the previous
      example will be displayed as    0003E800 (HEX).    There  are
      two  statements  that control the Hex display.   They are CON
      and COFF.   They control the way negative Hex answers will be
      handled.   See the STATEMENTS section for descriptions on the
      use of these statements.
"nnnn:call 38:if r=7}10
call26:wind" ANSWER SYSTEM  (2 of 2) 

  Decimal form:          
      The MATHX programs use 16 digit binary coded decimal math for
      all  calculations.   The maximum number of digits that can be
      displayed is 14.   The answer is  rounded  off  to  the  14th
      place.    This can be changed to a smaller number through the
      use of control statements.   The following statements  change
      the way the answer will be displayed:  DIGL, DIGR,  EON, EOFF
      AON,  AOFF,  RON,  ROFF,  EREQ,  XON  and  XOFF.     See  the
      STATEMENTS  section  for  information  on  these  statements.
      These  statements  will  change  the maximum number of digits
      allowed on the left and right  side  of  the  decimal  point,
      whether scientific notation is allowed  and  its display form
      and if the display will use commas.   Usually  if  the answer
      cannot be displayed in the  form allowed, scientific notation
      will  be used.   If scientific notation is not allowed then a
      DISPLAY FORM ERROR will result.   For  normal math  use,  the
      default settings will be good,  but, for some special purpose
      application programs you may want to tailor your answer form.
"n:call36:if r=2}350:goto10
#400:call28:x=0:i=0:j=0
wind r1c0wr22wc78BB1BF15B7F0" DATA INPUT  (1 of 4) 

  Numbers can be entered into the program in two forms.   Like  the
  answer  display  system,  numbers  can  be  entered in decimal or
  hexadecimal form.  

  Decimal input:
      The first thing to enter is the sign of the number.   Use the
      + or - keys for this.   (For plus values the + sign is can be
      omitted.)   Normal input or scientific notation can  be  used.
      The exponent (scientific notation) can be entered in two ways.
      Using brackets with the sign of the exponent in the  brackets
      before the number or using a capital  E  before the  exponent.
      Example:  1.23 E-19 or 1.23 [-19].  The largest exponent that
      is  allowed  on entry is  E+99  or  E-99  but answers will be
      displayed up to E+200 or E-200.   Up to 16 digits are allowed
      on entry not counting leading zeros.
"nnnn:call 38:if r=7}10
#410:call27:wind" DATA INPUT  (2 of 4) 

   Here are some examples of allowed decimal inputs.

           +12345678901234
           -12345.6789
          .000000000012345678901234  same as 1.2345678901234 E-11
          1.23456 [-12]              same as 1.23456*10^-12
          .000123456 E25             same as 1.23456 [+21]
          123456 E20                 same as 1.23456 [+25]
           -1234567890000000         same as -1.23456789 E+15

  Note:  If you are entering a negative number (or a + sign
         that is not for addition) at the beginning of a new
         instruction line, first hit the space bar or the <enter>
         key so that the program doesn't bring up the previous
         answer first.  See the MANUAL CALCULATIONS section.
"nnn:call37:if r=7}10:if r=2}400
#420:call27:wind" DATA INPUT  (3 of 4) 

  Hexadecimal input:
     The   `   character  is  used  at  the  start  and  end  of a
     hexadecimal number to be input.   A minus sign can be entered
     before  the  hex  number to input a negative value.   The hex
     number is converted to decimal by the MATHX  program for  all
     math  operations.    Here  are  some  examples of hexadecimal
     inputs.

         `AF301`
         `ffffffff`    (this is the largest hex number allowed)
         `-0012fac9`
         `+0100000F`
         `-fe000`
         `00abcdef12`
"nnnn:call37:if r=7}10:if r=2}410
call26:wind" DATA INPUT  (4 of 4) 
                     VARIABLES AND STRING MEMORIES

  Direct input to variables is done by the use of the = character.
  The format for this is variable=expression.  (Only the result is saved.)
    Examples:      A=1.2345
                   B=12*sin15
                   C=`af2b`
                   D''=x^3-y^2+z

  Direct input to string memories use the same method with one additional
  requirement.  The string must be put between ";" or ;"; characters.
  Formats: $letter=";"string" or: $letter=;";string;.  (60 characters max.)
       or: $letter=$letter  or: $letter=$(expression) 
    Examples:     $A=";" degrees ";"
                  $B=;End of program.;
                  $c=";"c^2+c-1"
                  $d=$(6)            (same as $D=$F)
                  $e=""              (clears the string memory)
                  $f=$x+$y+$(2)+" end."
;:call36:if r=2}420:goto10
#450:call28:x=0:i=0:j=0
wind r1c0wr22wc78BB1BF15B7F0" MANUAL CALCULATIONS  (1 of 3) 

  There are two general type of manual calculation methods that can
  be  used  with  the MATHX programs.   The first is the subsequent
  calculations method.   In this method you hit the ENTER key every
  time you put in a operation and a number or variable.  The answer
  will be displayed at each step of the way.  What happens is every
  time one of the operation characters +  -  /  \  *  ^  is entered
  at the start of the instruction line,  the program brings up  the
  answer  to  the  previous  math  expression  and then puts in the
  operation.  If the instruction line is started with any character
  other  then  the  six operation characters given above,  the math
  expression will be treated as a new math problem.
"nnnnnnnn:call 38:if r=7}10
#460:call27:wind" MANUAL CALCULATIONS  (2 of 3) 

     Example:   For the expression  125.12 + 12.23 - 159.56 + 6.12 + 45
              First input:
                   125.12+12.23<enter>
              Answer returned:
                            137.35
              Then input:
                   -159.56<enter>    (will be displayed as: 137.35-159.56 )
              Answer returned:
                            -22.21
              Then input:
                   +6.12<enter>      (will be displayed as: -22.21+6.12 )
              Answer returned:
                            -16.09
              Then input:
                   +45<enter>        (will be displayed as: -16.09+45 )
              Answer returned:
                             28.91
"n:call37:if r=7}10:if r=2}450
call26:wind" MANUAL CALCULATIONS  (3 of 3) 


  The second way of entering a math problem is to enter the whole
  math expression at one time and get one answer.
  Same example as above:
  
              Input:
                   125.12+12.23-159.56+6.12+45<enter>
              Answer returned:
                             28.91


     Note:  If  you  are  starting  a  math  expression with a negative
            number,  hit the space bar first or the  <enter>  key again
            so the program will not treat it as a subtraction operation.
"nnn:call36:if r=2}460:goto10
#500:call28:x=0:i=0:j=0
wind r1c0wr22wc78BB1BF15B7F0" ERROR MESSAGES  (1 of 9) 

   APPLICATION file not loaded!
        Displayed when an attempt is made to use an application and one
        has not been loaded or when there is an application file loading
        error. 


   DATA STATEMENT ERROR (VARIABLE TOO BIG)
        Displayed when the variable used for a DATA statement has a value
        that is bigger then the number of data positions in the data part
        of the DATA statement.
           example  X=6:DATA X {1,10,20,30,40,50}
        (remember the zero position in the data part of the statement)


   DISPLAY FORM ERROR
        Displayed when the decimal answer cannot be displayed in the form
        allowed by DIGL and XOFF statements.  Set XON or make DIGL bigger.
"nn:call38:if r=7}10
#510:call27:wind" ERROR MESSAGES  (2 of 9) 

   DIVIDE BY ZERO ERROR
        Displayed when at some point in the math expression an attempt
        is made to divide by zero or divide by a variable that equals zero.


   ERROR, Bad COMSPEC data!
        Displayed when using the EDIT or DOS commands and the program
        cannot find COMSPEC= in the DOS environment.  Add the line
        SET COMSPEC=COMMAND.COM to the autoexec.bat file.
        (include the path to command.com)


   (EDITOR statement over 40 characters long)
   SYNTAX ERROR
        Displayed when the path and command are over 40 characters long.
"nn:call37:if r=7}10:if r=2}500
#520:call27:wind" ERROR MESSAGES  (3 of 9) 

   EXPONENT OVERFLOW ERROR
        Displayed when at some point in the math expression the exponent
        of the answer register was over 200.


   FILE LOAD ERROR, could not find file!
        Displayed when the file being asked for can not be found.  Check
        for the correct path and name.


   FILE LOAD ERROR, could not open file!
        Displayed when the file being loaded cannot be opened by DOS.


   FILE LOAD ERROR, not enough memory!
        Displayed when there is not enough memory left in RAM to hold
        the contents of the file being loaded.
"n:call37:if r=7}10:if r=2}510
#530:call27:wind" ERROR MESSAGES  (4 of 9) 
   FILE LOAD ERROR, wrong file type!
        Displayed when the variables, string memories or parameters setup
        file being loaded is not of the right length to be of the correct
        MATHX version.  (Those file lengths may change for new versions.)


   FILE READ ERROR!
        Displayed when DOS is not able to read the file being loaded.


   FILE WRITE ERROR, access denied!
        Displayed when the variables or string memories are being saved
        to a read only disk or for some other reason the program was
        denied access to the disk.


   FILE WRITE ERROR, not enough memory!
        Displayed when there is not enough memory on the disk for the
        variables or string memories file.
":call37:if r=7}10:if r=2}520
#540:call27:wind" ERROR MESSAGES  (5 of 9) 

   (FKEY definition over 40 characters long)
   SYNTAX ERROR
        Displayed when there is more then 40 characters in
        the definition part of the FKEY statement.


   FUNCTION DEFINITION
   SYNTAX ERROR
        Displayed when the string for the definable function being used
        has a syntax error in it.  Look at the string statement used by
        the function for the error.


   GOTO or CALL location number 0 not allowed!
        Displayed when an attempt is made to define a GOTO location as 0.
        (:#0:)  Location 0 is reserved for the start of the instruction
        line or the start of the math application or utility file.
"nn:call37:if r=7}10:if r=2}530
#550:call27:wind" ERROR MESSAGES  (6 of 9) 
   GOTO or CALL location number not defined!
        Displayed when an attempt is made to GOTO a location that does
        not have a # number defined position.


   GOTO or CALL location number too big! (over 25)
        Displayed when an attempt is made to GOTO a location greater then
        25 in the instruction line or when an attempt is made to define
        a GOTO location that is greater then 25 in the instruction line.


   GOTO or CALL location number used already!
        Displayed when an attempt is made to define two or more
        locations the same number.


   HEX OVERFLOW ERROR!
        Displayed when the Hex value is greater then 0FFFFFFFF.
        (This is the limit of the Hex register)
":call37:if r=7}10:if r=2}540
#560:call27:wind" ERROR MESSAGES  (7 of 9) 

   LOG OF ZERO OR NEGATIVE NUMBER ERROR
        Displayed when an attempt is made to get the LOG or LN of zero or a
        negative number or a variable that equals zero or a negative number.


   MATHX.ENV file not loaded!
        Displayed when the MATHX program could not load the file.  This
        file is used for the pop-down menu operating environment.


   MATHX.HLP file not loaded!
        Displayed when asking for HELP and the help file was not loaded
        or as a result of a loading error.


   Parameter too long ERROR!
           Displayed when a command line parameter has more then 40
           characters.
"n:call37:if r=7}10:if r=2}550
#570:call27:wind" ERROR MESSAGES  (8 of 9) 
   POWER (ROOT) OF NEGATIVE NUMBER ERROR
        Displayed when an attempt is made to take a negative number or
        variable to a power that includes a root portion.
            example  -2^2.125


   Printer does not acknowledge or is out of paper!
        Displayed when PON statement is active and an attempt is made
        to send something to the printer and the printer does not
        acknowledge or is out of paper.  (printer not turned on)


   SQUARE ROOT OF NEGATIVE NUMBER ERROR
        Displayed when an attempt is made to square root a negative number
        or a variable that has a negative value.


   STACK ERROR, TOO MANY ()
        Displayed when over 100 parentheses are used in an expression.
"n:call37:if r=7}10:if r=2}560
call26:wind" ERROR MESSAGES  (9 of 9) 
   SYNTAX ERROR
        Displayed when data or an instruction is missing or not in the
        correct form or when a statement is not in the correct form or
        is not separated with a colon or comma.  The instruction line
        is returned and the cursor is set at the location of the error.


   SYNTAX ERROR
   THE NEXT 50 CHARACTERS FROM THE POINT OF ERROR ARE:
        Displayed when the application, utility or defaults file being used
        has a syntax error.  If so, the next 50 characters from the point
        of the error or until the end of the file, which ever comes first,
        will be displayed. (end of file is indicated by a small left arrow)


   Too many parameters ERROR!
        Displayed when the command line has more then just the name
        of a file to be loaded or when an application or utility file has
        more then three characters in its extension.
":call36:if r=2}570:goto10
#600:call28:x=0:i=0:j=0
WIND r1c0wr22wc78BB1BF15B7F0" OPERATING ENVIRONMENT  (1 of 6) 
   HEADER LINE & POP-DOWN MENUS:
          The header line below the top line has the names of the pop-down
        menus available to the user.  These pop-down menus can be accessed
        in three ways.
                  1.   With the mouse cursor on the name of the pop-down
                     menu desired, click the left mouse button.  Then
                     move the cursor to the item desired and click the
                     left mouse button again.
                  2.   With the mouse cursor on the name of the pop-down
                     menu desired, push the left mouse button and hold
                     it down then move the mouse cursor down to the
                     item desired and let up on the mouse button.
                  3.   Hold down the ALT key and hit the first letter of
                     the menu name desired.  Then use the cursor keys
                     to pick the desired item and then hit the Enter
                     key.  If the menu items have pick letters, hit that
                     letter on the keyboard to pick the item desired.
                     The pick letter will be of a different color or will
                     be highlighted and/or underlined.
":call38:if r=7}10   
#605:call27
WIND " OPERATING ENVIRONMENT  (2 of 5)

   COMMANDS:
     The COMMANDS menu has 8 selections available.
       Clear the Screen   (same as CLS)
       Clear inst. Line   (same as hitting the CTRL-X keys)
       Run Application    (application must be loaded first)
                          (see LOADAPL menu)
       Go To DOS shell    (enter EXIT to return to MATHX)
       Save Inst. Line    (only 1 line can be saved at a time)
       Get saved Line     (return the previously saved line)
       Edit Application   (the editor must be previously defined)
                          (an EDITOR statement should be in MATHX.DFT)
       QUIT MATHX         (you will be given a chance to change your mind)
                          (you will be able to save variables & memories)
                          (same as hitting the ESC key)


        See the CLS, @, LOAD, DOS, SAVE, GET, EDIT, and EDITOR statements
     and commands in the MATHX reference manual.
"nn:call37:if r=7}10:if r=2}600
#610:call27
WIND " OPERATING ENVIRONMENT  (3 of 5)

   PARAMETERS:
        This  menu  has most of the many parameters that can be changed
      to make  MATHX  look and do its job the way you want it to.   The
      way answers are displayed,  the  angular  modes and if you have a
      color monitor, the colors can be changed too.   If you change any
      of the  MATHX  parameters,  you will be asked if you want to save
      the changes to disk or if the changes are  temporary  only.   See
      the DIGR, DIGL, and EREQ statements in the MATHX reference manual.

   INFORMATION:
        This menu can be used to display this help  information file or
      you  can  display all of the variable values or all of the string
      memories.   This  menu gives you a quick and easy way to see what
      the function keys will do too.   The function keys  F1 through F8
      can be change using the  FKEY  statement and are normally defined
      in the MATHX.DFT file.   But they can be changed at any time from
      the instruction line.  See the FKEY statement in the MATHX
      reference manual.
"nn:call37:if r=7}10:if r=2}605
#615:call27
WIND " OPERATING ENVIRONMENT  (4 of 5)

   LOADAPL:
        This menu can be used to load an application file.   The file can
      then be run from the COMMANDS menu or by hitting the @ key and then
      Enter.   Only  one  application  can  be load at any time.   If the
      application  has  an  environment (.ENV) file available,  that file
      will be loaded onto the math environment and an MENUAPL  selection
      will be available on the header line.   The application  can now be
      run  by  selecting any item form this menu.   Application  filename
      extensions are (.APL).
      
   UTILITIES:
         The  UTILITIES  menu  can be used to load and run a utility file
      quickly.   A utility file does not stay loaded like the application
      file does.   Utility  files  do not have environment  (.ENV)  files
      because they are always run at the time they are selected.  Utility
      filename extensions are (.UTL).
"nnnn:call37:if r=7}10:if r=2}610
call26
WIND " OPERATING ENVIRONMENT  (5 of 5)

   NOTE:
        MATH EXTRA uses a file named MATHX.ENV to control the header, the
   pop-down menus and the operations of both.   This file is programmable
   and can be changed by the user so this information  is only  valid for
   the original MATHX.ENV file that came with MATH EXTRA.
"nnnnnnnnnnnnnn:call36:if r=2}615:goto10
