nand2tetris/projects/08/FunctionCalls/FibonacciElement/Sys.vm

// This file is part of www.nand2tetris.org
// and the book "The Elements of Computing Systems"
// by Nisan and Schocken, MIT Press.
// File name: projects/08/FunctionCalls/FibonacciElement/Sys.vm

// Pushes a constant, say n, onto the stack, and calls the Main.fibonacii
// function, which computes the n'th element of the Fibonacci series.
// Note that by convention, the Sys.init function is called "automatically"
// by the bootstrap code.

function Sys.init 0
push constant 4
call Main.fibonacci 1   // computes the 4'th fibonacci element