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PC related manual just scanned

Added:
First edition (Aug81) Technical Reference for the IBM 5150. Contains circuit diagram of 16-64KB motherboard and source listing for the first BIOS.
 
Added:
First edition (Aug81) Guide To Operations for the IBM 5150.

I love how page 1-7 shows that by using an Asynchronous Communications Adapter, one can get one's 5150 to communicate with a "Big Computer".
 
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