INTERNET OF THINGS -A HANDS ON APPROACH by Vijay Madistti

By

Comments

Post a Comment

Popular posts from this blog

PROGRAMMER'S MODEL OF 8086

By
Image
The programming model for a microprocessor shows the various internal registers that are accessible to the programmer.   The Following Figure is a model for the 8086. In general, each register has a special function. In the programming model there are -           4 General Purpose registers( Data Registers) -           4 Segment registers -           2 Pointer registers -           2 Index registers -           1 Instruction Pointer register -           1 Flag register General purpose registers: AX Register (Accumulator):  This is accumulator register. It gets used in arithmetic, logic and data transfer instructions. In manipulation and division, one of the numbers involved must be in AX...
Read more

8086 Main Features

By
a)      The 8086 microprocessor is a 16 bit microprocessor.   The term “16 bit” means that its arithmetic logic unit, internal registers and most of its instructions are designed to work with 16 bit binary words. b)        The 8086 microprocessor has a 16 bit data bus. It can read data from or write data to memory or ports either 16 bits or 8 bits at a time. c)         The 8086 microprocessor has a 20 bit address bus, so it can directly access 220 or 1,048,576 (1M) locations. d)      The 8086 microprocessor can generate 16 bit I/O address; hence it can access 216 or 65536 ports. e)      It is possible to perform bit, byte, word, and block operations in the 8086 microprocessor. It performs the arithmetic and logical operations on bit, byte, word and decimal numbers including multiplication and division. f)        The ...
Read more

Instruction Execution

By
  8086 fetches instructions and data from memory. The process of instruction execution is as follows. - The BIU outputs the contents of the instruction pointer register (IP) onto the address bus, causing the selected byte or word to be read into the BIU. -   Register IP is incremented by 1 to prepare for the next instruction fetch. -   Once inside the BIU, the instruction is passed to the queue. -   Assuming that the queue is initially empty, the EU immediately draws this instruction from the queue and begins execution. -           While the EU is executing this instruction, the BIU proceeds to fetch a new instruction. -           Depending on the execution time of the first instruction, the BIU may fill the queue with several new instructions before the EU is ready to draw its next instruction. -           The B...
Read more