The book contains: Microprocessors: 8085 architecture, bus organization, registers, ALU, control section, pin-diagram, basic fetch and execute cycle of a program, timing diagrams, types of instructions, instruction format, data format, addressing modes, instruction set of 8085, Programming the 8085, Interrupts and ISR Memory Interfacing: address space partitioning, logic devices for interfacing, R/ W and ROM models, memory map addresses, memory address range of 1K memory chip, memory address lines, memory word size, memory classification, memory structure and its requirements, basic concepts in memory interfacing, address decoding and memory addresses, interfacing the 8155 memory chip, absolute vs. partial decoding.