Data Structure and Modem

Data structure is a collection of data elements. It is also called data type. It is a tool to solve problems. Used to represent entities and to implement entities operations. Elements in the data type is called values of the type. There are four basic/atomic/primitive data types – int, float, char, double. More data types …

Continue reading ‘Data Structure and Modem’ »

Input output organisation

I/O system organisation Two methods for identifying I/O device identification, they are 8 bit address and 16 bit address identification. 8 bit address is used in peripheral mapped I/O  and 16 bit address is used in memory mapped I/O. In 8 bit address lines I/O read control signal is used for input devices and I/O …

Continue reading ‘Input output organisation’ »

memory organisation

Associated memory is content addressable memory (CAM), used to increase speed of memory access. Parallel access is possible in CAM, because of the locality of reference property of programs a large number of memory requests found in cache memory. Average time to reach a memory location of a memory and obtains its content is called …

Continue reading ‘memory organisation’ »

computer organisation – basics

Decoded instruction is stored in IR. The MAR (memory address register) is used to hold the address of the location to or from which data are to be transferred. MDR(memory data register) contains the data to be written into or read out of the addressed location. ISP stands for Instruction Set Processor. processor BUS is …

Continue reading ‘computer organisation – basics’ »

C programming tutorial

C has 32 keywords, these keywords cannot be used as variable name. Father of C programming – Dennis Richie. 16 bit compiler have integer range -32768 to 32767. C is a high level language with some low level features. C is primarily developed as system programming language If integer need two bytes of memory to …

Continue reading ‘C programming tutorial’ »