ADAM Delta DRAM to SRAM Converter

A repair and modernization mod rather than an expansion. The ADAM's main memory uses vintage DRAM chips that are now obsolete and increasingly failure-prone, and that also demand the awkward +12V and −5V supply rails of early-1980s memory.

This Lundy Electronics PCB mod replaces that DRAM with modern, readily available SRAM. Besides solving the parts-availability problem, it eliminates the need for the inefficient +12V and −5V rails entirely.