Three byte instruction , Electrical Engineering

Assignment Help:

Three byte instruction

The  instruction which  have 16  bit data address  as its  operand  are three byte  instruction. They  need three  memory  locations to store  them in memory.

Followings  are some  examples  of three  byte  instructions .

LXI 16 bit

JMP 16 bit  address

CALL 16 bit address

Let  us consider  a jump  instruction JMP 2050H. Now  notice  how this  instruction is stored  in the memory.

Notice that first byte is the operation  code. Second  byte is  the low  order byte of the 16  bit data  address. Third  byte is  the high  order  byte of the  16 bit  data  address.

Note  :Low  order byte  of 16 bit address  is multiplexed  with data  bus  and requires de multiplexing  which requires additional  time. But  high  order  byte of  the address does not  require  de multiplexing  therefore  we write  low order byte  first. The  de multiplexing  is already  discussed in cahpter2.


Related Discussions:- Three byte instruction

Compute the fourier transform, Compute the Fourier Transform of the followi...

Compute the Fourier Transform of the following function: f(x) = exp( - x 2 /(2σ 2 )) cos (2πx/k) where σ and k are constants. What is the minimum sampling rate required

THE THEORY, I WANT TO KNOW WHAT IS THE THORY OF PLOTTING V-I CHARACTERISTIC...

I WANT TO KNOW WHAT IS THE THORY OF PLOTTING V-I CHARACTERISTIC CURVE OF SILICON DIODE ???

Analog signal processing, Derive Equation 13-20 pertaining to the convers...

Derive Equation 13-20 pertaining to the conversion algorithm based on redefined unit capacitor

Binary coded decimal to decimal conversions, Binary Coded Decimal to Decima...

Binary Coded Decimal to Decimal Conversions • Step1. Break up the Binary Coded Decimal number into 4 bit binary number, starting from the least significant binary bit. • Step2

What is right-through routing, Q. What is right-through routing? In rig...

Q. What is right-through routing? In right-through routing, originating exchange determines complete route from source to destination. No routing decisions are taken at interme

Find the corresponding change ib in the base current, Q. Using the small-s...

Q. Using the small-signal equivalent circuit of a BJT with gm = 0.03 S, β = 75, and VA = 65 V, a load resistor RL is connected from the collector to the emitter, as shown in Figure

Discuss dos function call with one example, Discuss DOS function call with ...

Discuss DOS function call with one example. DOS function call: So as to use DOS function calls, always place the function number in register AH and load all other pertinent

For carry flag - return instructions , For Carry Flag  RC (Return of ...

For Carry Flag  RC (Return of Carry) and RNC ( Return on no Carry) Instruction RC returns from  the subroutine  to the calling  program if carry  flag is et (CY= 1). The

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