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I all. I'm going to do a Sonic the Hedgehog 1 repro for Game Gear. The rom is the one I did with the Master System's sprites style. I have a Lion King's cartridge donor, but I don't know what memory to use. The Lion King's size is 512KB, and Sonic the Hedgehog size is 256KB.

You need a donor with mapper, so a 1mo game, the most easy to find is Garefield.

Revo wrote

You need a donor with mapper, so a 1mo game, the most easy to find is Garefield.

I think that until 512KB roms, there's no need a mapper, so I don't have that problem. I am questioning about what pin 32 memory to use with.

I'm guessing most Game Gear games used ROM chips with the mapper embedded.
Since you're not going to be able to get new ROM chips with an embedded mapper, that is why the suggestion to get a cart with a separate mapper chip.

I think that he means about the writable memory where write a ROM file.

No, you need a separate mapper chip and they're quite rare/unknown for Game Gear.

Here a short video about my cartmodding of R-Type for Game Gear (in french but english subtitles):

Author	Message
tailsnic Joined: 17 Mar 2017 Posts: 46 Location: Spain	What type of memory I have to use with a Game Gear repro? Posted: Sat Apr 15, 2017 6:29 pm
tailsnic Joined: 17 Mar 2017 Posts: 46 Location: Spain	I all. I'm going to do a Sonic the Hedgehog 1 repro for Game Gear. The rom is the one I did with the Master System's sprites style. I have a Lion King's cartridge donor, but I don't know what memory to use. The Lion King's size is 512KB, and Sonic the Hedgehog size is 256KB.

Revo Guest	Posted: Sat Apr 15, 2017 8:29 pm
Revo Guest	You need a donor with mapper, so a 1mo game, the most easy to find is Garefield.

tailsnic Joined: 17 Mar 2017 Posts: 46 Location: Spain	Posted: Sun Apr 16, 2017 12:42 pm
tailsnic Joined: 17 Mar 2017 Posts: 46 Location: Spain	Revo wrote You need a donor with mapper, so a 1mo game, the most easy to find is Garefield. I think that until 512KB roms, there's no need a mapper, so I don't have that problem. I am questioning about what pin 32 memory to use with.

KingMike Joined: 14 Oct 2008 Posts: 513	Posted: Sun Apr 16, 2017 6:12 pm
KingMike Joined: 14 Oct 2008 Posts: 513	I'm guessing most Game Gear games used ROM chips with the mapper embedded. Since you're not going to be able to get new ROM chips with an embedded mapper, that is why the suggestion to get a cart with a separate mapper chip.

law81 Joined: 21 Oct 2015 Posts: 303	Posted: Sun Apr 16, 2017 6:23 pm
law81 Joined: 21 Oct 2015 Posts: 303	I think that he means about the writable memory where write a ROM file.

Maxim Site Admin Joined: 19 Oct 1999 Posts: 14745 Location: London	Posted: Sun Apr 16, 2017 8:21 pm
	No, you need a separate mapper chip and they're quite rare/unknown for Game Gear.

Revo Guest	Posted: Mon Apr 17, 2017 3:33 pm
Revo Guest	Here a short video about my cartmodding of R-Type for Game Gear (in french but english subtitles):

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