Hi RxGian,
1-
NO! DO NOT buy that. It's not what you need.
2-You have to buy one of these:
---1: for NES:
---2: for Sega Mega Drive:
---3: for Sega Master System:
3-
Yes, you have to buy this:
4-If there aren't any of those in your country, you must make one yourself:
---1: An EEPROM is the memory inside your game cartridge that the game's data are stored.
---2: If you want to move your own data into the cartridge, you need EPROM programmer and eprom eraser.
---3: You have to buy EPROM programmer and eprom eraser from electronics store.
---4: After that, you can open up your cartridge and use the tools to insert your own data into the cartridge.
If you can't understand any part of this, tell me and I'll explain more.
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@others: I understand that I didn't exactly add anything new, but I tried to be a little bit more understandable for him.![]()