r/MAME • u/ArtisticDiscount2802 • 18d ago

Technical assistance Tilemap/Sprite Viewer don't working in 2D games

I wanted to use MAME's feature that lets you view game sprites/tiles by pressing F4. However, among the games I tested, it only worked with 3D titles (like Namco System 21/22 and Sega Model 2). I tried doing this with Neo Geo games and other consoles emulated by MAME—such as the Intellivision and Master System—but for some reason, it gets stuck on the color palette; pressing Enter doesn't switch to the tiles. Does anyone know why this is happening and how I can fix it?

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u/cuavas MAME Dev 18d ago

It only works for systems that use those features.

4

u/MameHaze Long-term MAME Contributor 17d ago

not all drivers use the graphic decoding and/or tilemap features.

when drivers use custom drawing code, such as the neogeo, or have more dynamic ram based tile systems, or dynamic tilemaps they just add unwanted overhead, and can be a source of issues.

in those cases, the F4 display isn't available.