We included a few examples in the
examples/ folder. To build the ROM files,
run the following from your terminal:
10 Print ☞
The gbforth version of the classic BASIC one-liner
10 PRINT CHR$(205.5+RND(1)); : GOTO 10. Produces a random maze-like pattern on
Aces Up ☞
A solitaire card game.
A Brainfuck interpreter running a program that prints “Hello World!” to the screen.
Happy Birthday ☞
Written for the Game Boy’s 30th anniversary. Uses the music lib to play Happy Birthday and prints the lyrics to the screen.
Hello World ASM ☞
The result of decompiling an example ROM at the very start of this project. Uses plain assembly to print “Hello World !” to the screen.
Hello World ☞
The most basic introduction to gbforth – essentially a Forth rewrite from the ASM version. Uses the term lib to print “Hello World !” to the screen.
A classic game where the player needs to memorise and repeat a growing sequence of notes. Read the step-by-step guide to learn how to implement this game yourself.
Bernd Paysan wrote this code
in 1995 for gforth.
We modified it slightly (but as little as possible) to make it run on the Game
Boy. The changes are limited to adding
RAM to control memory
locations, moving some definitions into meta definitions (
:m ... ;), and
adding a little initialisation code to
main. Most levels are commented out to
make the game fit on a 32 KB cartridge, and the UI strings are shortened to fit
the LCD display.