New cartridges with upgraded software now available.

DataBoy is an RS-232 data scope that runs on a Game Boy. This type of instrument is also known as a serial line monitor or protocol analyzer. DataBoy consists of a cartridge that plugs into a standard Game Boy Color, Game Boy Advance, or Game Boy Advance SP console, converting the Game Boy into a useful engineering/troubleshooting tool.


  • Setup page allows selectable baud rate, data bits, parity, and stop bits. Power-on default settings can be set by user.
  • Captures and displays RS-232 asynchronous serial data traffic on RXD and TXD lines simultaneously.
  • ASCII and hexadecimal display modes.
  • Freeze mode allows review of data captured in buffer.
  • Color LCD display. 16 rows of 20 characters are used to display alternating rows of RXD and TXD data in two distinct colors.
  • Error status indicators (parity, framing, break).
  • Line status page shows updated state of signal lines using simulated red/green LEDs.
  • DIP switches allow user to assert an active high RS-232 level on DTR, DSR, CTS, RTS signals.
  • Record serial data into flash memory for playback (DataBoy Plus).
  • Time-stamps (DataBoy Plus).
  • Multi-drop mode is compatible with gaming industry 9-bit SAS protocol and Raymarine SeaTalk protocol (DataBoy Plus).
  • Upload captured data to a PC.
  • Help screens explain how to use the instrument.
  • Field upgradable software.
  • Comes with a 5' ribbon cable with male and female DB9 connectors.

DataBoy Cartridge

DataBoy Plus


Test Drive (DataBoy Plus)

Why Game Boy?

Game Boy Color vs. Game Boy Advance

Users' Manual (191K PDF)

Printable Flyer (82K PDF)


Contact Information

DataBoy on Game Boy Advance SP.

DataBoy on Game Boy Advance.

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This website is maintained by Yosuf Taraki. Last updated on September 29, 2012.

Disclaimer: Game Boy is a trademark of Nintendo Corporation. DataBoy is a product of Micro Contraptions, and is not licensed by or associated with Nintendo Corporation.

DataBoy on Game Boy Color.