User Manual

Stack commands
command
stack
effect
description
DEPTH +1 gets the number of numbers on the stack
DROP -1 removes the top number from the stack
DUP +1 duplicates the top number
OVER +1 duplicates the number directly below the top, copying it onto the top
PICK -1,+1
takes a number n between 0 and 63, then puts the nth number below the top
onto the stack (0 PICK is equivalent to DUP)
SWAP
a,b →
b,a
swaps the top two numbers
ROT
a,b,c
→
b,c,a
permutes the top three numbers so that the 3rd becomes the top and the others
move down one position
ROLL -1,*
takes a number n, then permutes the top n+1 numbers so that the n+1th
becomes the top and all of the others move down one
PEEK -1,+1
(Mini Maestro 12, 18, and 24 only) takes a number n, then copies the nth
value on the stack (measured from the bottom) to the top of the stack
POKE -2,+1
(Mini Maestro 12, 18, and 24 only) takes a number n, then removes the next
value from the stack and puts it at the nth location on the stack (measured from
the bottom)
Mathematical commands (unary)
These commands take a single argument from the top of the stack, then return a single value as a
result. Some of these have equivalents in C (and most other languages), listed in the “C equivalent”
column below. We use “false” to mean 0 and “true” to mean any non-zero value. A command returning
“true” always returns a 1.
Pololu Maestro Servo Controller User’s Guide © 2001–2019 Pololu Corporation
6. The Maestro Scripting Language Page 74 of 102