References Tandy 2000 BIOS AMD 80C186/80C188 Preliminary Intel 80C186EA/80C188EA Microprocessor User's Manual Similar http://www.testech-elect.com/tern/acore.htm https://www.embeddedts.com/products/TS-2100 https://www.jamieiles.com/80186/ https://www.retrobrewcomputers.org/doku.php?id=boards:sbc:sbc-188:start https://www.kswichit.com/C188/c188sbc.htm