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Bottom-right comms section
Full description and reverse-engineering analysis here: www.eevblog.com/forum/projects/avionics-teardown-looking-...
McCann's Pharmacy CPU. Washington County. Photo by E Kalish, Mar. 2010.
Part of the Post Mark Collectors Club (PMCC) collection.
A Computer CPU is, in simple terms, the “brain” of your computer. It is also known as the processor. CPU’s are used to process everything from basic to complex functions. Every time something needs to be computed it gets sent to the CPU. It attaches directly to the motherboard using a socket and is usually cooled by a heat sink or fan. Depending on the manufacturer of the computer processor, the socket types will be different. They are measured in "clock speed" or the amount of processing it can do per second (megahertz).
(Updating album with better photography)
Many inner-layer traces visible between the two mystery ASICs
Full description and reverse-engineering analysis here: www.eevblog.com/forum/projects/looking-inside-an-old-airc...