Module II (Assembly Language Programming) 

8086 Addressing modes – Instruction set – Data transfer Instructions – String Instructions – Logical Instructions – Arithmetic Instructions – transfer control Instructions – Processor control instructions. Basic Concepts of modular programming – Assembler directives – Memory organization – full segments and models – Macros Assembly language programming examples for block transfer, multi precision arithmetic operations, Code conversion, searching Sorting, subroutine calls, stack operations, Time delay loops, simple programs using DOS and BIOS interrupts etc. 

Concepts of executing assembly language programs using MASM.

Module III (Interfacing with 8086) 

Programmable Peripheral interface (8255) – Mode 0,1,2 operations – Interfacing programs – A/D and D/A interfacing and programming examples. 

Serial Communication Interfaces – Asynchronous communication – Synchronous communication – Programmable communication Interface (8251) – Interfacing programs –Programmable interval timers – Operating modes – Interfacing and Programming Intel 8253 – Interval timer application A/D interfacing. 

DMA Controller – Organization of Intel 8237 – Different modes of operation. Interrupt Controller - Organization of programmable interrupt controller 8259. 

Keyboard and Display interface – key board display controller – Internal block diagram of 8279. Interfacing of matrix key board, seven segment LED display using 8279 – Interfacing programs for key board and LED display.

Module IV (Microcontroller 8051)

Overview of 8051 microcontrollers – Architecture – Assembly programming –data types and directives –flag bits – register banks and stack – loop and Jump instructions – call instructions – Arithmetic and Logic instructions and simple programs – 8051 interrupts – programming timer interrupts. 

Interfacing of microcontroller – External memory interfacing-LCD and Keyboard interfacing – Parallel and serial ADC interfacing – DAC interfacing – Interfacing 8255 - Stepper motor control – DC motor interfacing.