Procedure which divides a 32-bit number by a 16-bit number, Computer Engineering

Assignment Help:

Write a procedure which divides a 32-bit number by a 16-bit number. The procedure must be general which is it's defined in one module and can be called from another assembly module.

; REGISTERS   : Uses CS, DS, SS, AX, SP, BX, CX

; PROCEDURES: Far Procedure SMART_DIV

DATA_SEG SEGMENT   WORD PUBLIC

     DIVIDEND DW 2345h, 89AB; Dividend = 

    ; 89AB2345H

     DIVISOR DW 5678H; 16-bit divisor

     MESSAGE DB 'INVALID DIVIDE', '$'

DATA_SEG ENDS    

 

MORE_DATA   SEGMENT     WORD

                                 QUOTIENT   DW   2 DUP (0)

                                 REMAINDER   DW      0 

MORE_DATA ENDS

STACK_SEG   SEGMENT   STACK

                                 DW   100 DUP (0); Stack of 100 words

                                 TOP - STACK   LABEL WORD; top of stack pointer

STACK_SEG   ENDS

PUBLIC       DIVISOR

PROCEDURES SEGMENT   PUBLIC                    ; SMART_DIVis declared as an

EXTRN SMART_DIV: FAR                                    ; external label in procedure 

                                                                                    ; Segment of type FAR

PROCEDURES ENDS

; declare the code segment as PUBLIC so that it can be merged with other PUBLIC

; Segments

CODE_SEG SEGMENT WORD   PUBLIC

            ASSUME CS: CODE, DS: DATA_SEG, SS: STACK SEG

            START:  MOV AX, DATA_SEG; Initialize data segment

            MOV DS, AX   ; using AX register

            MOV AX, STACK_SEG   ; Initialize stack segment

            MOV SS, AX; using AX register

            MOV SP, OFFSET TOP_STACK; Initialize stack pointer

            MOV AX, DIVIDEND   ; Load low word of

                                                ; Dividend

            MOV   DX DIVIDEND + 2; Load high word of

                                                ; Dividend

            MOV CX, DIVISOR   ; Load divisor

            CALL SMART_DIV   

; This procedure returns Quotient in the DX: AX pair and Remainder in CX register. 

; Carry bit is set if result is invalid.

                                 JNC SAVE_ALL; IF carry = 0, result valid

                                 JMP STOP          ; ELSE carry set, don't

                                                             ; save result

                                 ASSUME DS: MORE_DATA   ; Change data segment

SAVE_ALL:  PUSH DS   ; Save old DS 

MOV BX, MORE_DATA          ; Load new data segment

MOV DS, BX                              ; register

MOV QUOTIENT, AX              ; Store low word of

                                                     ; Quotient

MOV QUOTIENT + 2, DX   ; Store high word of

                                                     ; Quotient

MOV REMAINDER, CX   ; Store remainder

ASSUME DS: DATA_SEG  

POP   DS; Restore initial DS

JMP ENDING

STOP:                       MOV DL, OFFSET MESSAGE

                                 MOV AX, AH 09H

                                 INT   21H  

ENDING:   NOP

CODE_SEG ENDS

                                 END START


Related Discussions:- Procedure which divides a 32-bit number by a 16-bit number

Explain simple interfacing, Q. Explain Simple Interfacing? The followin...

Q. Explain Simple Interfacing? The following is a sample of the coding, used for procedure interfacing: PUBLIC CUROFF             _TEXT SEGMENT WORD PUBLIC 'CODE'

E-r diagrams, for ticket reservation in trains for payroll processing for i...

for ticket reservation in trains for payroll processing for insurance database

What is delegation, What is delegation? Delegation gives a proper mecha...

What is delegation? Delegation gives a proper mechanism to achieve the desired code reuse. The method is caught in the desired class and forwarded to another class for actual i

Different industries which use this marketing tool, What are the different ...

What are the different industries which use this marketing tool? Ans) Many dissimilar companies can use this tool for developing their business plan but it is often three main

Why network layer is used, Network Layer is used for (A)  Breaking up ...

Network Layer is used for (A)  Breaking up the data in frames for transmission (B)  Deal with Error correction (C)  Automatic Recovery of Procedure (D)  Physica

Constraint satisfaction problems, Constraint Satisfaction Problems: Fu...

Constraint Satisfaction Problems: Furthermore I was perhaps most proud of AI on a Sunday. However this particular Sunday, a friend of mine found an article in the Observer reg

#computer architecture, explain common bus system with the help of neat dia...

explain common bus system with the help of neat diagram in basic computer.

What is mother board, What is mother board? Mother Board is a main syst...

What is mother board? Mother Board is a main system printed circuit board which having the processor. It will occupy an unacceptably large amount of space on the board.

Gather some ram data after system was powered off, (a) When a forensic exa...

(a) When a forensic examiner arrives at a crime scene, the first task done is referred to as "Incident Response". Summarize the different incident response tasks done in 10 steps.

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