Use of array in assembly language, Marketing Management

Assignment Help:

Q. Use of array in assembly language?

Let's write a program to add two 5-byte numbers stored in an array. For illustration two numbers in hex can be:

1018_Use of array in assembly language.png

Let's also presume that numbers are represented as the lowest significant byte first and put in memory in two arrays. The result is stored in third array SUM. SUM also includes the carry out information therefore would be 1 byte longer than number arrays.

; Program: Add two five-byte numbers using arrays

; ALGORITHM:

;           Make count = LEN

;           Clear the carry flag

;           Load address of NUM1

;           REPEAT

;                       Put byte from NUM1 in accumulator

;                       Add byte from NUM2 to accumulator + carry

;                       Store result in SUM

;                       Decrement count

;                       Increment to next address

;           UNTIL count = 0

;           Rotate carry into LSB of accumulator

;           Mask all but LSB of accumulator

;           Store carry result, address pointer in correct position.

; PORTS   : None used

; PROCEDURES: None used

; REGISTERS: Uses CS, DS, AX, CX, BX, DX

DATA SEGMENT

                        NUM1 DB 0FFh, 10h ,01h ,11h ,20h

                        NUM2 DB 10h, 20h, 30h, 40h ,0FFh

                        SUM DB 6DUP (0)

DATA ENDS

                        LEN EQU 05h; constant for length of the array

CODE SEGMENT

                        ASSUME CS: CODE, DS: DATA

START:           MOV AX, DATA; initialise data segment

                        MOV DS, AX; using AX register

                        MOV SI, 00; load displacement of 1stnumber.

                                                ; SI is being used as index register

                        MOV CX, 0000; clear counter

                        MOV CL, LEN; set up count to designed length

                        CLC   ; clear carry. Ready for addition

AGAIN:          MOV AL, NUM1 [SI]; get a byte from NUM1

ADC AL, NUM2 [SI]; add to byte from NUM2 with carry

MOV SUM [SI], AL; store in SUM array

INC SI

LOOP AGAIN; continue until no more bytes

RCL AL, 01h; move carry into bit 0 of AL

AND AL, 01h; mask all but the 0th bit of AL

MOV SUM [SI], AL; put carry into 6th byte

FINISH:          MOV AX, 4C00h

INT 21h

CODE             ENDS

END START


Related Discussions:- Use of array in assembly language

Buying process, what is proposal solicitation in buying process

what is proposal solicitation in buying process

Marketing, marketing factors influencing pricing decisions

marketing factors influencing pricing decisions

Describe about the sales promotion tool, Describe about the Sales promotion...

Describe about the Sales promotion tool Advertising and sales promotion are tools which allow for a high level of control by the sponsor while public relations, and publicity in

Test Marketing, What is test marketing? Explain the various approaches that...

What is test marketing? Explain the various approaches that are followed by FMCG companies in test marketing

Choice of an advertising agency by location, Q. Choice of an advertising ag...

Q. Choice of an advertising agency by location? A main consideration in the choice of an advertising agency is location of office of agency. A significant amount of communicati

Define the advertisement contents, Define the Advertisement contents? ...

Define the Advertisement contents? Advertisement contents Message : - Consist of opinion, symbols, Facts and Pictures related to the product. Purpose: -        Communi

Need answers, Quantitative Techniques Q4. Find elasticity of demand of the...

Quantitative Techniques Q4. Find elasticity of demand of the function x=150-5P at (1) P=15, (2) P=20. (5 marks) Q5. Find dy/dx of the following cases 1. y=x2 log x. 2. log x /x. (

Commercialization or crash introduction strategy development, What is Comme...

What is Commercialization or Crash Introduction Strategy Development? Commercialization or Crash Introduction: A crash introduction is about full scale commercialization

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