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Please note that:

GatesBoy™ is designed for Non-Game Application development. Because of their enhanced I/O capabilities, GatesBoy™ carts CANNOT be used to copy, backup or download any Nintendo copyrighted material.

GatesBoy Cartridge GatesBoy™ Cartridge Specs

The GatesBoy™ cartridge is supplied complete in its translucent plastic case. It is ready to plug into a Game Boy Pocket or Color and carries a 6 month warranty.

128 KBytes of Flash ROM.

2 KBytes of volatile RAM. The RAM can be made non volatile by adding a 3V battery inside the cart.

The double sided PCB has a gold plated edge connector and is tinned over the rest of its surface. It does *not* have any resist (green paint). This makes life a bit easier for hardware designers who therefore do not risk damaging the PCB while trying to scrape off the resist.

Built in I/O ports
A built in female DB25 connector has 5 Bi-directional lines, 5 Output and 4 Input (all TTL) under user program control.
+5V from the Game Boy is also present but you should use this with great care to avoid damaging either your Game Boy or your GatesBoy™. In any case, you should not draw more than 10 mA.

Program (ROM) Download
The female DB25 connector is also used to program the GatesBoy™ Cartridge via the Parallel Port of an IBM PC.

We wanted to provide developers with the lowest possible startup costs, so we eliminated the need (and cost) of a special programmer to program the cart. All the many features of the GatesBoy™ cart are programmed via the Parallel Port of an IBM PC.

You will need a Parallel Port cable with a 25 pin male connector at each end. If you want to make your own, connect pins 2-9 and 11-19 at one end to the same pin numbers at the other end. If all 25 pins are connected that is also fine.
The download cable is not supplied.

Plastic case
The GatesBoy™ cartridge case is in translucent plastic. There is plenty of empty space in the case to mount your custom hardware. The case is designed with openings for a DB25 connector and a slot for either a SmartMedia card or through which you can pass a ribbon cable to connect to the outside world.

Rapid hardware development
The GatesBoy™ cartridge has an internal bus. Provision is made for mounting a SmartMedia Card connector. and two plug-in Daughter Boards on the main PCB Mother Board.

No SmartMedia Card Interface is supplied with the GatesBoy™ cartridge
However, the Mother Board PCB has provision for mounting a SmartMedia Card connector. In addition, there is a slot in the plastic case designed to take a SmartMedeia Card. One possibility is to use a second 3.3V processor on a Daughter Board in a circuit that you design and build yourself, to interface to a SmartMedia Card.

Rapid software development using free tools
Jeff's GB programming site has an extensive range of software tools ranging from Assemblers, C Compilers, Jeff's GB Basic, Tutorials, Graphic and music utilities. It is also a good source of GB development news and job opportunities.

DNC Ltd. has been serving the development community since 1997.
GatesBoy™ Specs updated 6 August 2004.
GatesBoy™ is a trademark of David Nathan Creations Ltd.
Game Boy & Nintendo are trademarks of Nintendo Co., Ltd. of Kyoto, Japan.
SmartMedia is a trademark of Toshiba Corporation.