Return To Castle Intel: 16 Years Of Motherboard HistoryBy September of 1994, Intel was ready to bail on the 5V Pentium plan. The Plato motherboard jumped to Socket 5 while preserving many of Batman’s quirks. You still only find PS/2 on the back. There’s 256KB of cache mounted on the PCB—a laughable amount compared to the several megabytes now baked into modern CPUs—and the board could support system memory configurations up to 128 MB across two banks. Plato supported Pentium 75 or 90 chips, and there was a jumper on the motherboard (JP7) you had to set in order to enable the correct processor.
Gateway came out with an OEM version of Plato called Neptune, which just makes you wonder if someone in the company erroneously thought the name was Pluto and wanted to be one planet closer to Earth.
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