ASC (str)
 
- Returns ASCII code of first charactr of specifed string.

  Example:
  
  A = ASC( T$ )   
    
    


CLS c

– Clears screen, optionally filling it with a color (0-8).

  CLS c Clears display to specified color c. If color is not specified, green 
  is used.

  0-Black
  1-Green 
  2-Yellow
  3-Blue
  4-Red
  5-Buff (white)
  6-Cyan
  7-Magenta
  8-Orange

  Example:
  
  CLS 7

  

COLOR (forground,background) 

- Sets forground and background color.

  Example:
  
  COLOR 1, 3
  
  

CONT 

- Continues program execution after pressing or (break) useing STOP statement



DRAW "string"

- Draws a line beginning at specified starting point of specified length of 
  specified color. Will also draw to scale, draw blank lines, draw non-updated 
  lines, and execute substrings. If starting point in not specified, the last 
  DRAW position or default of (128,96) is used. 
  
  Example:
  
  DRAW "BM100,100;S10;U25;BR25;ND25,XA$;"
  
  Movement Commands
  
  The DRAW command uses specific character codes to determine direction and 
  movement: 

  Un: Up
  Dn: Down
  Ln: Left
  Rn: Right
  En: Diagonal Up/Right
  Fn: Diagonal Down/Right
  Gn: Diagonal Down/Left
  Hn: Diagonal Up/Left
  "n" represents the number of pixels to move. 
  
  For example, DRAW "U10 R5" moves the cursor 10 pixels up and then 5 pixels 
  right. 

  Special Control Commands
  
  M x,y: Move to absolute coordinate (x,y) or relative (+x,+y) if a + or - sign 
         is used.

  B: Move without drawing (Blank). E.g., DRAW "BU10" moves up 10 pixels without 
     plotting them.

    Like with the U and other movement commands, B and M can be combined as for 
    example:
  
    DRAW "BM100,100"

  N: Move and draw, but return to the original position afterward (No-update).
  
    For example, drawing down for 25:
    
    DRAW "ND25"

  Cn: Set color (n = 0-3 for CoCo 1 and 2, or higher with CoCo 3 palettes).

  Sn: Set scale factor (n). Default is 4. Scale 1 is smallest, 255 is largest.

  An: Set angle (n = 0, 1, 2, 3). 0=0°, 1=90°, 2=180°, 3=270°. 
  



END

- Ends execution of BASIC code.



FOR and NEXT

- Create a stepped loop

  Example:
  
  10 FOR I = 1 TO 10
  20 PRINT I 
  30 NEXT I



GOSUB 

- Calls a subroutine beginning at specified line number.

  Example:
  
  GOSUB 500



GOTO 

- Jumps to a specified line number.

  Example:
  
  GOTO 300 
  


IF and THEN and ELSE

- check values for condtions 

  Example 1:
  
  IF A=5 THEN 30
  
  will jump to line 30 if the value of A is 5.
  
  
  Example 2:

  IF A>B THEN 100
  
  will jump to line 100 if the value of A is greater than the value of B
  
  
  Example 3:
  
  IF X=10 THEN PRINT "YES" ELSE PRINT "NO"

  


INPUT var

- Takes input from keyboard

  Example 1:
  
  INPUT A$
  
  This will read and store a string from the keyboard
  
  INPUT D
  
  This will read and store a number from the keyboard



MEM 

- Finds the amount of free memory.

  Example:
  
  PRINT MEM



MID$ (str,pos,length) 

- Returns a substring of another string starting at pos. If lenght is omitted, 
  the entire string right of position is returned.

  Example:
  
  F$ = MID$( A$, 3)
  ? MID$(A$, 3, 2) 



PEEK

  Example Command: 
  
  PEEK(116)

  Result: Returns 127 in a 32K/64K System or 63 in a 16K System.
  Remarks: Can be used to ascertain the memory size of a computer.

  Example Command2: 
  
  PEEK(116) * 256 + PEEK(117)

  Result: Returns maximum memory in System.



PLAY "string"

  [**tested]

  PLAY "note"
  PlAY "length;note"
  PLAY "volume;note"

  MUSICAL NOTE/NUMBER
  Number Note
  1      C
  2      C#/D
  3      D
  4      E-/D#
  5      E/F
  6      F/E#
  7      F#/G
  8      G
  9      G#/A
  10     A
  11     A#/B
  12     B

  

  Note: PLAY does not recognize the notation B# or C-. 
  
  Play A note:
  PLAY "A"

  Add another note:
  PLAY "A;A#"
  
  Add pause

  PLAY "A;P2;A#"

  Change Volume

  PLAY "V5;A;P2; V10;A;P2; V30;A;P2"

  Change Note Length
  
  PLAY "L2;A;L4;A;A;L2;A;A"
  

  


POKE (location, value) 

- Puts value (0-255) into specified memory location.

  Example:
  
  POKE 25,6:POKE 26,1:POKE 1536,0:NEW

  Makes maximum memory available for basic programs.
  Any basic program in memory is cleared. Not compatible with disk systems. 
  Does not allow the use of graphics.
  
  Example Command2: 
  
  POKE 280,PEEK(275)

  Result: Helps COCO Generate 'TRUE' Random Numbers.
  Remarks: Same as the Ext. Basic Statement   
  X = RND(-TIMER).
  



PRESET 

- Reset a point to background color.

  Example:
  
  PRESET (5,6)



PRINT 

- Prints specified message or number to screen.

  Example:
  
  PRINT "HI" 



REM

- Non executed comment or a remark usually for documenting purpose. 



RETURN

- Used to return to the place of the GOSUB



RND

- Creates a random number

  Example:
  
  RND(0) 
  
  Returns a random floating-point number between 0 and 0.99999999999999.

  Example 2:
  
  10 X = RND(-TIMER) :REM Seed the generator
  20 FOR I = 1 TO 10
  30 PRINT RND(10); :REM Print 10 random numbers between 1-10
  40 NEXT I

  

SGN (numeric) 
  
-  Returns sign of specified numeric expression



SIN (numeric) 

- Returns sine af angle gleen in radians



SOUND tone, duration

  tone can be 1 to 255
  duration can be 1 to 255


  10 PRINT "TO MAKE ME CHANGE MY TONE"
  20 PRINT "TYPE IN A NUMBER FROM 1 TO 255"
  30 INPUT T
  40 SOUND T, 50
  50 GOTO 10


  SOUND 1 , 100 
  SOUND 255, 100 






STRINGS (length, code or string) 

- Returns a string of characters (of specified length) specified by ASCll code 
  or by the first character of the string.



SQR (numeric)

- Square root of a number

  Example:

  Y=SQR(5+2)