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RED and GREEN swapped at SEGA 315-5242 outputs? #14

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jotego opened this issue May 27, 2022 · 3 comments
Open

RED and GREEN swapped at SEGA 315-5242 outputs? #14

jotego opened this issue May 27, 2022 · 3 comments

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@jotego
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jotego commented May 27, 2022

We are extracting the schematics for the SEGA System 18 PCB. We've found that the way signals go to the JAMMA connector seem to have RED and GREEN swapped with respect to the schematic you made below. I wonder whether it is updated, or whether there is some room for doubts about it. Thanks.

https://github.com/furrtek/VGChips/blob/master/Sega/315-5242/315-5242_schematic.png

@furrtek
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furrtek commented May 27, 2022

On the two Sega schematics I have, the 315-5242 module's pinout matches the schematic.
Maybe they didn't follow the same order for the output channels on some boards ? It shouldn't make any difference if the game doesn't use the greyscale mode.

@jotego
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jotego commented May 28, 2022

Which SEGA schematics use this chip? I'd like to check them, please.

@furrtek
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furrtek commented Jun 27, 2022

They're the schematics for After Burner and Galaxy Force.

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