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A comment on Teardown of a PC Power Supply. Parent comment

Re:Teardown of a PC Power Supply by kens on Sunday May 23, 2021 @05:35PM (#27258799)
Early DRAM chips like the MK4116 required -5 V, +5 V, and +12 V. (-5 was the substrate back bias for the chip.) So the ISA standard required -12 V, -5 V, +5 V, and +12 V.
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