phillrb/mega-tech-cartridges

Sega Mega-Tech reproduction game carts

Mega-Tech-Cartridges

DIY Sega Mega-Tech game cart designs based on reverse engineering of the original 171-5782/171-5783 cartridges.

171-5782 - Mega Drive

This is the original cart for MD based games with a single 4 Megabit ROM.

171-5782 Repro

• 1:1 reverse engineered copy to the original.
• No jumper settings needed for use.
• Only supports 40-pin ROMs.

171-5782 Redux

• Removed unused jumpers / capacitors.
• Add 8-32Meg 42-pin EPROM support by jumpers.
• Add 1mm edge connector length for shells with low tolerances.
• Add JLCPCB silkscreen for "Remove Order Number - Specify a location"

171-5783 - Master System

This is the original cart for SMS based games with a single 1 or 2 Megabit ROM.

171-5783 Repro

• 1:1 reverse engineered copy to the original.
• Needs JP1 bridged for 1 Megabit ROMs.
• Needs GND knot on IC1 drilled out as is done on original carts.

171-5783 Redux

• Removed unused jumpers / capacitors.
• Removed GND knot.
• Add 1mm edge connector length for shells with low tolerances.
• Add JLCPCB silkscreen for "Remove Order Number - Specify a location"

Manufacturing Notes

The gerber zip files in each project folder can be uploaded directly to most suppliers.

JLCPCB

• PCB specifications: standard 2 layer PCB, 1.6mm thickness. Select "Gold Fingers" and "30°finger chamfered".
• Redux PCBs: select "Remove Order Number - Specify a location".