Tag Archives: instruction


Write and explain the sequence of micro-operations that are required to fetch and execute this instruction? – IGNOU MCA Assignment 2015 – 16

MASTER OF COMPUTER APPLICATIONS Course Code : MCS-012 Course Title : Computer Organisation and Assembly Language Programming Assignment Number : MCA(I)/012/Assignment/15-16 Maximum Marks : 100 Weightage : 25%   Assume that the machine as stated in part (a) has named 5 of its general purpose registers based on their possible role in instruction execution as… Read More »

Evaluate the effective address if addressing mode is Direct, Relative, Register indirect, Index with lndex register 6m Dec2005

An instruction is stored at location 500 with its address field at location 501. The address field has the value 300. A processor register R1 contains the number 100. Evaluate the effective address if the addressing mode of the instruction is   6m Dec2005                        … Read More »

Explain the working of the instruction pipelining, with the help of a diagram 5m Dec2005

Explain the working of the instruction pipelining, with the help of a diagram 5m Dec2005  INSTRUCTION PIPELINING To extract better performance instruction execution can be done through instruction pipeline. The instruction pipelining involves decomposing of an instruction execution to a number of pipeline stages. Some of the common pipeline stages can be instruction fetch (IF),… Read More »

Write and explain the sequence of micro-operations that are required to fetch and execute this instruction? – IGNOU MCA Assignment 2014 – 15

MASTER OF COMPUTER APPLICATIONS Course Code : MCS-012 Course Title : Computer Organisation and Assembly Language Programming Assignment Number : MCA (2)/012/Assign /2014-15 Maximum Marks : 100 Weightage : 25% A hypothetical 16 bit machine has PC, AC, MAR, IR, DR and Flag registers (You may assume the roles of these registers same as that… Read More »

Assume that a new machine has been developed. Give justification of the selection of every addressing mode? – IGNOU MCA Assignment 2014 – 15

MASTER OF COMPUTER APPLICATIONS Course Code : MCS-012 Course Title : Computer Organisation and Assembly Language Programming Assignment Number : MCA (2)/012/Assign /2014-15 Maximum Marks : 100 Weightage : 25% Assume that a new machine has been developed. This machine has 64 general purpose registers of 64 bits each. Out of these 64 registers, 32… Read More »

An Assembly program to exchange two memory variables using XCHG instruction

Now we will write another Assembly program which does some Exchange Operation.   Before actually starting to write the program, Let’s understand XCHG instruction. As we know the programs work only with the instructions in the instruction set. Instruction XCHG is used to EXCHANGE memory variables in the following permutations above. REG stands for Registers (Eg.  AX, BX,… Read More »