The book contains Microprocessors, Microprocessor Instruction Set, Computer Languages, Microcomputers. Interfacing I/O devices and Memory. Memory mapped I/O and I/O mapped I/o. Register Organisation of 8086, Architecture, Signal Descriptions of 8086, Physical Memory Organisation, General Bus Operation, I/O Addressing Capability, Special Processor Activities, Minimum Mode 8086 System and Timings, Maximum Mode 8086 System and Timings. Machine Language Instruction Formats, Addressing Modes of 8086, Instruction Set of 8086, Assembler Directives and Operators, ALP. Introduction to Stack, Stack structure of 8086, Interrupts and Interrupt Service Routines, Interrupt Cycle of 8086, Non Maskable Interrupt, Maskable Interrupt (INTR), Interrupt Programming, Passing Parameters, to Size More than 64K, MACROS, Timings and Delays.