The
GB Xchanger is a very
popular console backup unit from a
company called
Bung, located in
Hong Kong. It's
intended use is to
burn games into its
EEPROM so that the Nintendo
Game Boy (or
Game Boy Color) can
play them.
However, one of the best
side-effects of this tool of
piracy is that it allows you to
program for said console. In fact, the
software that has been
created to
hack away at the
GameBoy is quite good, with a whole suite of
disassemblers and
debuggers.
The unit is in no way affiliated with
Nintendo of America, (or
Nintendo of any other company). In fact, Nintendo
sued Bung to keep such units out of the
United States. They are VERY difficult to get a hold of, but if you are a
programming fanatic, then you will definately want to get one of these (through an importer) and try your hand at the Gameboy.