8086 data sheet **broken link removed**
8086 architecture **broken link removed**
8086 addressing mode and instruction set **broken link removed**
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the best book that shall help you is "8086/8088 Microprocessor Interfacing and Software" by Muhammed Ali Mazidi is the best content book that shall help you.
Also if you want to extend your knowledge to the Pentium-4 Architecure the "barry b.brrey Intel Microprocessor" is very good as well