Befunge-93 instruction list 0-9 Push this number on the stack + Addition: Pop a and b, then push a+b - Subtraction: Pop a and b, then push b-a * Multiplication: Pop a and b, then push a*b / Integer division: Pop a and b, then push b/a, rounded down. If a is zero, ask the user what result they want. % Modulo: Pop a and b, then push the remainder of the integer division of b/a. If a is zero, ask the user what result they want. ! Logical NOT: Pop a value. If the value is zero, push 1; otherwise, push zero. ` Greater than: Pop a and b, then push 1 if b>a, otherwise zero. > Start moving right < Start moving left ^ Start moving up v Start moving down ? Start moving in a random cardinal direction _ Pop a value; move right if value=0, left otherwise | Pop a value; move down if value=0, up otherwise " Start string mode: push each character's ASCII value all the way up to the next " : Duplicate value on top of the stack \ Swap two values on top of the stack $ Pop value from the stack . Pop value and output as an integer , Pop value and output as ASCII character # Trampoline: Skip next cell p A "put" call (a way to store a value for later use). Pop y, x and v, then change the character at the position (x,y) in the program to the character with ASCII value v g A "get" call (a way to retrieve data in storage). Pop y and x, then push ASCII value of the character at that position in the program & Ask user for a number and push it ~ Ask user for a character and push its ASCII value @ End program My extentions: