Getting Started
Tradition dictates that the first program that is written in any programming language should be Hello, World!
In that same spirit, let’s look at the “hello world” of Bitsy: Passthrough:
1mod Passthrough {
2 incoming in of Word[8];
3 outgoing out of Word[8];
4
5 out := in;
6}
We see a module declaration, mod Passthrough.
Inside, we see two ports, one incoming port named out and one outgoing port named in.
Both have type Word[8], meaning that an 8-bit value passes across them.
The line out := in connects the input port in to the output port out.
The notation := is called a wire.