Why is there more than one ground on Pin-outs?

Includes but not limited to: SNES, Genesis, Sega CD, PlayStation 1, Nintendo 64, Dreamcast, Game Gear and I guess the Virtual Boy.

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hailrazer
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Post by hailrazer »

Kyo wrote:buuuut ground is the place where the electrons are getting the hell out of the circuit.
Technically ground is the place where the electrons are jumping onto the circuit. :)
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bacteria
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Post by bacteria »

What I know is that, for example, the Intellivision plug'n'play system - two grounds, if you connect both together the system doesn't work right; the buttons on one side (d-pad) have a common ground and the other side (buttons) have a different one. They need to work independently.

I don't have the electronics knowledge to explain this, but I know it to be true as I experimented on the board in question. As someone else mentioned, this situation happens on some other gadgets too, so is not unique, but annoying none the less.
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