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"News & info related to GameBoy software & hardware development."
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Cart Writers

2005-10-21 - Gameboy Xchanger & Doctor GB 64M card - Posted by: Martin Halbach
Here's a review of the Gameboy Xchanger. It featurres also other devices and has links to later GBA devices as well.

2000-11-01 - GameJack Help - Posted by: Reuben Helms
This page tells of my experience with getting the GB Gamejack working and may be helpful for anyone else wishing to do the same.

2000-03-06 - Lukas Zimmermann's GB page - Posted by: Lukas Zimmermann
A description on how to make a cart programmer based on the design by Michael McCormack (synchronized CartIO) with single sided PCB layout.

Includes detailed pictures.

2001-07-09 - Power Of Asm :Kit de Programmation pour Game Boy - Posted by: Jeff
Plans for making your own cart reader / writer can be found here (in french)...

2000-08-17 - Reiner's Page - Posted by: Jeff Frohwein
Plans for making your own cart reader / writer can be found here.

2001-03-10 - The Best way of Setting up the Gameboy Gamejack - Posted by: Paul Fon
The is the best way of setting up UFO/Gametech's Gameboy Game Jack. With Pics, steps, and easy guide. It also has the solution to the NON-DOS Problem of writing Multi-Carts with the Gameboy Gamejack.

2007-06-03 - USB/RS-232 GB Programmer - Posted by: Jeff Frohwein
GB Cart Flasher is a new cartridge reader and programmer for use with Gameboy consoles and was designed as cheap and easy to build alternative for existing devices. You can connect it to your PC via serial port (RS232) or USB.

Game Link

2000-10-16 - Adding a Game Link to a Super GameBoy - Posted by: Jeff Frohwein
The idea came from a web page in Japanese, so the original credit goes to the authors of that page, Papa and Shaora, as they are the ones who figured out that it would work. You may want to check out their page for the pictures.

2001-04-05 - Connecting a PC keyboard to your Gameboy - Posted by: Steven M and Joe Bardell
A working, easy-to-use PC keyboard driver for gameboy! NO interface chips required! Just a direct connection. NO messy interrupts to deal with. NO extra pins needed. Just include the file, call the init function, and it's ready to work! Has functions for inputting numbers as well as strings Works in graphics mode as well as the text mode. Supports shift and caps lock, and automatic scrolling if the input gets too big. Includes 2 demo ROMs, the include file, and a connection diagram.

2000-03-01 - Four-Player Adapter / Game Link Cable / Cable Adapter - Posted by: Jeff Frohwein
Allows 4 GBs to connect together for multi-player games that support it.

2000-03-01 - GameBoy - to - Parallel Port Cable, Rev G - Posted by: Jeff Frohwein
Diode added. Diode is needed by some PC ports. Up until now this cable has only worked on some computers due to a design bug (Thanks go to Scott Kroeger for finding it. :) It *should* now work on most computers. Here's a schematic for connecting your GameBoy to an IBM-PC Parallel Port for exchanging data. NOTE: ONLY GB BASIC CURRENTLY MAKES USE OF THIS CABLE.

2000-03-01 - GameBoy Link Port I/O - Posted by: Jeff Frohwein
Here's a circuit for controlling 16 digital outputs & reading 16 digital inputs with a GameBoy.

2000-03-01 - GameBoy Link Port Output Format - Posted by: Jeff Frohwein
Here's assembly code, a timing diagram, and a circuit for controlling external projects with a GameBoy. You can add as many digital outputs as you want to this port.

2000-10-16 - MadCatz GameBoy-to-PC Cable - Posted by: Jeff Frohwein
Here's a schematic of the cable made by Mad Catz which appears to use a PIC chip as an interface. The circuitry all fits inside the clear purple DB25 connector housing and uses a DIP package that can easily be replaced with a machined socket. Check the Mad Catz page for suggested price & cable photo.

NOTE: The data format for using this interface and the code required to program the PIC chip ROM are unknown by myself.


2000-10-16 - 134a Power Down Chip - Posted by: Jeff Frohwein
Here is the 8 pin 134a chip found in MBC5 carts that contain RAM + Battery. It protects cart RAM from false writes during power down. This document is in PDF format. It appears to be the same as the 26a chip found in MBC1 carts with RAM. Here is a simple view of what this chip does.

2000-03-01 - GameBoy Cart Info - Posted by: Jeff Frohwein
Cartridge information on ROM-only & ROM/RAM cartridges. Provided courtesy of Pascal Felber.

2000-03-01 - GameBoy LCD Schematic - Posted by: Jeff Frohwein
This is the schematic for the separate LCD board in the older, full-size GameBoy.

2000-03-01 - GameBoy Power & Cartridge Schematic - Posted by: Jeff Frohwein
This is a schematic of the switching power supply onboard the older, full-size GameBoy as well as the two external power supplies available from Nintendo. An example EPROM cartridge is also here.

2000-03-01 - GameBoy Schematic - Posted by: Jeff Frohwein
This is the older, full-size GameBoy main board.

2000-03-01 - MBC1 Circuit Equivalent - Posted by: Jeff Frohwein
For connecting an eprom larger than 256KBits to GameBoy you need a Nintendo MBC chip or you can use this circuit.

2000-05-22 - MBC5 Pinouts - Posted by: Jeff Frohwein
MBC5 cart with rumble. Check here for an even nicer MBC5 pinouts. And here are MBC3 pinouts.

2000-03-01 - ROM+RAM+MBC1 Cart Schematic - Posted by: Jeff Frohwein
Here is the cart diagram for the Memory Bank Controller (MBC) 1.

2005-03-15 - SRAM Fix - Posted by: Fahad
This is a very easy SRAM fix involving a new FRAM replacement and 2 wires. This gets rid of the batteries and memory loss.

2000-03-01 - Super GameBoy Schematic - Posted by: Jeff Frohwein
When I saw Super GameBoy's on sale at the local store, I though, "Do I need this?" The longer I though about this the more my curiosity of what might possibly be inside seemed to take over my whole thinking process. I reached the point of 'no return'. I had to buy it relieve my curiosity. What I discovered inside is basically that it seems that the Super GameBoy is a regular GameBoy minus some parts (i.e., LCD, keys, power supply). An extra chip is added to interface the GameBoy to the SNES to control key inputs and to capture video to display.


2002-07-01 - DataBoy - Posted by: Jeff Frohwein
"DataBoy is an instrument for monitoring data traffic on a bidirectional RS-232 asynchronous serial communication link. This type of instrument is usually called a data scope or protocol analyzer. DataBoy consists of a cartridge that plugs into a standard Game Boy Color or Game Boy Advance console, converting the Game Boy into a useful engineering/troubleshooting tool."

2000-03-01 - Etienne Danvoye's GB Page - Posted by: Jeff Frohwein
Step by step instructions for building a GB Basic cartridge.

2002-04-09 - Floppy disk drive on GameBoy ! - Posted by: Jeff
This page show that a floppy disk drive on Game Boy is possible!

2000-06-21 - Gameboy Color/Pocket FM Radio - Posted by: Jeff Frohwein
Here's a US$10 device that turns your GB into a FM radio.

2001-03-09 - GatesBoy - Posted by: Jeff Frohwein
Plugs into the Game Boy. Reprogrammable Flash ROM and enhanced I/O facilities. Permits Rapid Development of Custom Interfaces. Ideal for Networking, Measure, Test, Instrumentation and Control Applications.

2000-02-29 - GB Camera-to-PC Circuit - Posted by: Jeff Frohwein
Victor Kemp has published a GB Camera to Parallel Port Interface schematic. This circuit allows you to interface the 128 x 128 pixel CCD camera element in the small round ball of the GB Camera to a PC parallel port. None of the rest of the GB camera circuitry is used for this purpose.

2001-02-22 - GBC ProSound mod - Posted by: Mathman/1.000.000 Boys
How to modify your Game Boy Color to get a bassy and clean sound, similar to that of the old Game Boy.

2001-01-09 - GBDSO - Digital Sampling Oscilloscope - Posted by: Jeff Frohwein
The GameBoy digital sampling oscilloscope converts a GBpocket or GBcolour into a multipurpose test instrument.

2005-10-07 - Gbne2k - Posted by: jan willeke
Connecting a ne2k networkcard to a Gameboy

2005-09-19 - Gbne2k - Posted by: jan willeke
Connecting a ne2k networkcard to a Gameboy

2001-04-03 - Interact Shark MX - Posted by: Jeff Frohwein
The Shark MX is a specially designed gameboy cart that has a modem and software that lets you send and receive email, along with organizer functions. Also the pinout and wiring information for the Game Shark cable.

2000-03-12 - Jeff's GameBoy Robot - 'CyberWeasel' - Posted by: Jeff Frohwein
Here's my GameBoy robot. Here's a bottom view. The mechanical kit I got from lynxmotion. For electronics I used a GameBoy Pocket, a game cartridge with SRAM (and the ROM removed), the GameBoy I/O Example, Robot Power/Servo Schematic and a 27C256 eprom running GB Basic. The eprom /CE is supplied from the GameBoy I/O Example. Even though I've already programmed it to move small objects around, basically this is just the starting point for more advanced electronics. Notice that there is still plenty of space underneath for future electronics expansion.

2000-02-29 - Ken's GB Page - Posted by: Jeff Frohwein
Various projects for GB can be found here. Universal learning remote, IBM keyboard to GBC , and make an N64 controller rumble using a GB Pocket.

2000-03-01 - Marc Rawer's GB Projects Page - Posted by: Jeff Frohwein
Lots of good documents and GB hardware projects can be found here.

2000-04-12 - Non Game Expansion Box - Posted by: Jeff Frohwein
Here's an expansion box for GB hardware developers from David Nathan. Check this page if you might be interested in owning your own.

2000-02-29 - SGB Link Cable Mod - Posted by: Jeff Frohwein
Here's information for adding a link cable port to a Super GB.

2001-07-29 - SongPro - Posted by: Jeff Frohwein
A portable MP3 music player for your GameBoy! Download, store and play MP3s on your GameBoy with the new Songboy. For only $89.00 (U.S. price estimate) , you can transform your GameBoy and GameBoy Color into a portable music player. Best of all, on the GameBoy screen you can see pictures and album covers, song lyrics and artist credits.

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