AppleSoft II BASIC

ABS(numeric-experssion)

  Returns absolute value. Always a non negative number.

  Examples:
  
  100 PRINT ABS(42.3)

  100 VV=ABS(-6.124)
  
 

ASC (char)

  Returns numeric value of a single character.



CALL value

  Example:
  
  100 CALL -936
  
  Example will clear the screen



CHR$ (integer) 

  CHR$ can be used to convert a number between 0 and 255 into an ASCII character

  Special:
  CHR$(7)	Make a "beep" 
  CHR$(8)	Backspace (move cursor left, wrap up)
  CHR$(10)	Line feed (move cursor down)



CLEAR

  Clear all variables



COLOR = integer
  
  Sets the color for plotting in low resolution graphics.
  
  0 = black
  1 = magenta
  2 = dark blue
  3 = purple
  4 = dark green
  5 = grey
  6 = medium blue
  7 = light blue
  8 = brown
  9 = oragne
  10 = grey
  11 = pink
  12 = green
  13 = yellow
  14 = aqua
  15 = white
  
  COLOR = set to zero by the GR command.



DATA

  The DATA command is used to store constant information in the program code, and 
  is used with the BASIC command READ.
  
  Example:
  
  100 DATA 156,243,311,22,99,500,111,132,101,909,33,35
  110 FOR X=0 TO 11 
  120 READ A 
  130 PRINT A
  140 NEXT



DIM

  The DIM command allocates space in array memory for a new array.
  
  Example:
  
  100 DIM T(8,1,5)
  
  Example creates a three-dimensional array.
  


DRAW aexpr [ AT aexpr, aexpr ]

  DRAW draws a hi-res shape table shape in color



END

  Stops the execution of code.
  
  Example:
  
  100 IF X>200 END



FLASH

  Set text output mode to flashing



FOR .... NEXT

  FOR creates a loop with counter variable  - ends with NEXT [var [, var ...] ]

  NEXT Ends the loop(s)



GET variable

Read single key stroke to variable.



GOSUB line-number

  The program branches to the indicated line-number.  When a RETURN statement
  is executed, the program branches to the statement immediately following the 
  most recently executed GOSUB.



GOTO line-number

  Jump [branch] to line number



GR

  The GR command turns on Low-resolution color graphics mode.
  (40x40)
  
  GR sets COLOR to zero (black).
  The GR command will black out the top twenty lines of text on your screen and
  leave only four lines of text at the bottom.



HCOLOR = integer

  Set hi-res color (0...7)
  
  0 = black
  1 = green
  2 = violet
  3 = white
  4 = black 2
  5 = orange
  6 = blue
  7 = white 2



HGR

  Starts Hi-Res graphics mode.



HLIN



HOME
  
  Clears the screen of text and places the cursor for text in the upper top left
  of the screen.



IF ...THEN




INVERSE

  Set text output mode to inverse [black-on-white]



MID$



NORMAL



PLOT



PRINT

  Output text. 

  PRINT expr [ [;,] expr ... ] [;]

  ; concatenates, 
  , advances to next tab stop. 
  A trailing ; suppresses line break. 
  
  expr can include SPC(aexpr) to advance by multiple spaces, or TAB(aexpr) to 
  advance to column.



READ var [, var ...]

  Read the next DATA value



REM

  Program documentation. Documentation can be entered after the statement without 
  effecting the program.

  Example:

  100 REM THIS LINE DOES NOTHING



RETURN

  See the GOSUB command. When a RETURN statement is executed, the program branches 
  to the statement immediately following the most recently executed GOSUB.



ROT = number

  Number can be 0 to 255.



TEXT

  Set display to text mode



VLIN



XDRAW aexpr [ AT aexpr, aexpr ]

  Draw hi-res shape table shape with XOR