Imported from GitHub: bbbbbr/gb_to_megaduck_cart_adapter · commit efe789e · license Unlicense

Description

Cart slot adapter to use Game Boy cartridges on MegaDuck consoles

README

Game Boy to MegaDuck Cart Slot Adapter

Design files for a plug-in adapter to use Game Boy cartridges on a MegaDuck console.

The consoles have near identical cpu cores (1) and an almost identical cart pinout but a different edge connector style (Game Boy: one-sided, MegaDuck double-sided) and different cartridge widths (MegaDuck cart slot is narrower). This adapter allows plugging GB carts into the MegaDuck Console.

*1. But with modified register addresses, values and other changes to make the MegaDuck incompatible.

Game Boy game compatibility

• Q: Does this mean regular Game Boy carts/games will run unmodified on the Mega Duck with this adapter?
• A: No. Game Boy games require manual ROM patching to alter their register addresses, values and other changes in order to run on the Mega Duck.

Why?

Flash carts for the Game Boy are easier to obtain and are available with a wider variety of features than those for the MegaDuck. Having access to the full range of GB flash carts opens up a lot of options for Mega Duck homebrew development, research and testing. This includes Game Boy Cameras modified to allow running custom ROMs run on them.

Cartridge Shell

The following 3D printable cartidge shell design can be used with this adapter if the top edge of it is either removed from the design before printing or manually trimmed after printing.

https://github.com/bbbbbr/megaduck_cartridge_shell

TODO: Make cart shell specicially meant for this adapter

Riser Height

The design has been built with 11mm risers which provides enough clearance to plug in a some GB Interceptor builds.

Riser heights down to 3.5mm - 4mm should work and would result in a much smaller gap between the cart and the back of the console.

License

Per the LICENSE file this design is released into the public domain and no attribution is required.

Credits & Thanks

Thanks to Sean Riddle, Nitro2k, TexElec (pcb design)

Alternate Top Board for Game Boy Camera

A different top board that allows using a regular Game Boy Camera Shell (modified ROM still required) is also available. It changes the orientation so the Game Boy cart connector is facing UP.

The design is by Raphaël Boichot: https://github.com/Raphael-Boichot/Megaduck-to-game-boy-camera-adapter

Pix

GB to MegaDuck Cart Edge Connector Pinout Mapping

Mega Duck Cart Side	Pin Num	GB/DMG Pin	Mega Duck Pin
top	1	VCC	+5 VDC
bottom	2	CLK	CLK
top	3	/WR	/WR
bottom	4	/RD	/RD
top	5	CS	CS
bottom	6	A0	A0
top	7	A1	A1
bottom	8	A2	A2
top	9	A3	A3
bottom	10	A4	A4
top	11	A5	A5
bottom	12	A6	A6
top	13	A7	A7
bottom	14	A8	A8
top	15	A9	A9
bottom	16	A10	A10
top	17	A11	A11
bottom	18	A12	A12
top	19	A13	A13
bottom	20	A14	A14
top	21	A15	A15
bottom	22	D0	D0
top	23	D1	D1
bottom	24	D2	D2
top	25	D3	D3
bottom	26	D4	D4
top	27	D5	D5
bottom	28	D6	D6
top	29	D7	D7
bottom	30	/RST	/RST
top	31	VIN	NC
bottom	32	GND	NC
top	33	-	NC
bottom	34	-	NC
top	35	-	GND
bottom	36	-	GND