Unconditional jump - jump instruction , Electrical Engineering

Assignment Help:

Unconditional Jump

JMP ( Unconditional Jump ) Instruction: This  instruction is used to transfer  the execution to the  specified  memory  address unconditionally ( does not check any condition before jump).  It is  normally  used to create an indefinite  loop. The  instruction format is

                            JMP 16 bit memory address

Actually it copies  the specified  memory address into the  program counter register. Hence the  microprocessor reads  the next  instruction from the address  stored in the program  counter. Now as  usual  the contains  of the  program  counter register  starts  incrementing by  one. Program executes sequentially until it encounters any other  branch  instruction.

See followings   example to  understand  the working  of JMP  instruction.

Note: You  must have noticed that Sex codes  of IN  and OUT  instruction  are written  at two  consecutive  memory  locations and Hex  codes  of JMP instruction  are written at  three  consecutive  memory  locations. Without going  into the  details of the Hex  codes and size of the instruction at this moment ( which will be  discussed later in this chapter) let us concentrate on the working  of the JMP  instruction.

In the  above program the instruction JMP  20502H will  transfer  the execution back to the first instruction which is stored  at 2050H and keep on repeating the  task by  creating  an indefinite  loop.

The  above  program may be  written  as shown  below using labels when written  using  assembler. In laboratory using microprocessor  kit one has to the hex  codes( programming techniques will be explained in detail in chapter4).

The label  represent the  memory  address of the instruction written  along with  it. In the above  program the label  START represents the  memory  address 2050H where IN  instruction is stored. It is referred  by JMP  instruction  written at memory  location 2054H.


Related Discussions:- Unconditional jump - jump instruction

What are the different types of distributing frames, Q. What are the differ...

Q. What are the different types of distributing frames used in exchanges? Ans: Different distribution  frames  used  in  exchange  are  displayed in  figure.  Each subscribe

Find the small-signal equivalent circuit parameters, Given that a BJT has β...

Given that a BJT has β = 60, an operating point defined by I CQ = 2.5 mA, and an Early voltage V A = 50 V. Find the small-signal equivalent circuit parameters g m , r o , and rπ.

Rankine cycle and modified rankine cycle, Discuss in detail the several ene...

Discuss in detail the several energy resources and their availability. How does a Rankine cycle differ from a modified Rankine cycle? Write down the mathematical expression of m

Explain the and gates - microprocessor, Explain the AND GATES - Microproces...

Explain the AND GATES - Microprocessor? The AND GATE has a logic 1 or high output if the entire inputs are high. The boolean and symbol expression for a 3-input AND gate is sho

Assmblly language, hi PA DS:1234 = AB PA DS:1235 = CD if i typed mov DX,[...

hi PA DS:1234 = AB PA DS:1235 = CD if i typed mov DX,[1234H] WHAT SHOULD I GET IN DX ?

Determine the value of the capacitance in single phase, Q. Three loads in p...

Q. Three loads in parallel are supplied by a single phase 400-V, 60-Hz supply: Load A: 10 kVA at 0.8 leading power factor Load B: 15 kW at 0.6 lagging power factor Load C:

Explain dipolar polarization, Explain dipolar polarization. Dipolar ...

Explain dipolar polarization. Dipolar polarization is a polarization which is particular to polar molecules. Such polarization results from permanent dipoles that retain po

Explain the importance of distributing frames, Q. Explain the Importance of...

Q. Explain the Importance of distributing frames? Basically four levels of cabling are used as displayed in Figure. At the subscriber end, drop wires are taken to a distributio

Determine the current in the circuit and the voltage, Q. Two identical junc...

Q. Two identical junction diodes whose volt-ampere relation is given by Equation in which I S = 0.1 µA, V T = 25 mV, and η = 2, are connected as shown in Figure. Determine the cu

Mixed bonding, Mixed Bonding Displayed by III-V compounds bonding p...

Mixed Bonding Displayed by III-V compounds bonding partly ionic and partly covalent. Ionic character of bonding becomes much more prominent since the constituent atoms m

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd