Bigger scheme - sam's capsule: Befunge-93 instruction list

           /       \       /
    k --- a         b --- f
   /       \       /       \
           me --- l         i
   \       /       \       /
    j --- c         d --- e
           \       /
            g --- h

- 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 towards 0.
- % Modulo: Pop a and b, then push the remainder of the integer division of b/a.
- ! 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 and discard it
- . Pop value and output as an integer followed by a space
- , Pop value and output as ASCII character
- # Bridge: 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 (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
- (space) No-op. Does nothing