Operating Systems > macOS

MoBo on the Backplane

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hm_murdock:
obob...

The entire mainboard, including processor, plugs into an edge-connector slot on a combination power/wiring/speaker/port board.

On another riser slot that's on the mobo itself, are the PCI slots.

Pretty crrrazy design.

obob:
wow, that's hard to invision, I don't see any advantages over something like ATX/BTX either, as having the PSU integrated into a mainboard provides for a more complex board + if it takes a surge other stuff is likely to go with it

davidnix71:
There were DOS/Win processor cards. You could run more than one OS natively on the same machine. Upgrading was plug and play. Bus speeds were so slow it didn't matter that you were running from a pci slot.

hm_murdock:
obob, the power supply is a standard ATX in the case. The difference is that instead of having a wire bundle and a connector, it's wired directly to the wiring board. There's a line of fuses to protect the mainboard.

As for upgrades, that's the main reason they went to this wierd design. The idea was that when the G3 procs arrived, there would be a mobo swap. That way, you have an entirely modernized board for your G3, and not just a proc upgrade.

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