Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Describe Program Control Instructions?
These instructions specify conditions for altering the sequence of program execution or we can say in other words that the content of PC (program counter) register. PC points to memory location which holds the subsequent instruction to be executed. The alteration in value of PC as a result of execution of control instruction such as BRANCH or JUMP causes a break in sequential execution of instructions. The most common control instructions are as following:
JUMP and BRANCH may be unconditional or conditional. JUMP is an unconditional branch used to implement simple loops. JNE jump not equal is conditional branch instruction. The conditional branch instructions like BRP X and BRN X causes a branch to memory location X if the result of most recent operation is positive or negative correspondingly. If the condition is true PC is loaded with branch address X and next instruction is taken from X otherwise PC is not changed and the subsequent instruction is taken from location pointed by PC. Figure below displays an unconditional branch instruction and a conditional branch instruction if content of AC is zero.
MBR←0; Assign 0 to MBR register
X←2001; Assume X to be an address location 2001
READ X; Read a value from memory location 2001 into AC
BRZ 1007; Branch to location 1007 if AC is zero (Conditional branch on zero)
ADD MBR; add the content of MBR to AC and store result to AC
TRAS MBR; Transfer the contents of AC to MBR
INC X; Increment X to point to next location
JUMP 1001;Loop back for further processing.
What is MASK OPERATION The mask operation is similar to selective-clear operation except which the bits of Aare cleared only where there are corresponding 0's in register B. th
Six machines H1, H2, ..., H6 are linked by two Ethernet switches SW1 and SW2 as given below. Both switches have four ports drawn. The port numbers are as indicated. Suppose the two
In this task you are supposed to create three UML diagrams. The conditions are given by the scenario in the document Theatre Case (on Blackboard). A theatre manager has ordered a s
Q. Designing the instruction format is a complex art? Instruction Length Significance: It's the fundamental issue of the format design. It concludes the richness and flex
First Generation Electronic Computers (1937-1953) Three machines have been promoted at different times as first electronic computers. These machines used electronic switches
As a resource manager As a virtual machine
Explain about CSMA/CD It is an access method used mainly with LANs configured in a bus topology. With CSMA/CD, any station (node) can transmit a message to any other statio
Multiprogramming or multitasking? Ans: The OS manages the concurrent execution of many application programs to make best possible use of computer resources. This pattern of si
Karnaugh map is used for the purpose of ? Ans. Karnaugh map is used for, to minimize the terms in a Boolean expression.
Instruction Cycle The instruction cycle consists of a series of steps needed for the implementation of an instruction in a program. A typical instruction in a program is descri
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd