I Did Some Of The Code But Cant Figure Out The Rest, I Need Help. In Class We Ar

Question

I Did Some Of The Code But Cant Figure Out The Rest, I Need Help. In Class We Are Using Ubunto Linux . So Can You PLEASE help .

Question : Write a program to read in a hex digit A-F and display it on the next line in decimal.

My Work :  

.section .data

msg1:    .ascii "Enter A Hex Value From A Through F "

msg2:    .ascii "In Decimal It Is "

char: .ascii "? "

msgend:

.equ len1, msg2 - msg1

.equ len2, msgend - msg2

.section .text

.global _start

_start:

movl     $4,        %eax

movl     $1,        %ebx

movl     $msg1,     %ecx

movl     $len1,      %edx

int      $0x80

mov1 $3,             %eax

mov1 $0,             %ebx

mov1 $char,          %ecx

mov1 $2,             %edx

int $0x80

movb char,         %al

movb %al,          char

This Part Is The End :

movl     $1,        %eax

movl     $0,        %ebx

int      $0x80

Explanation / Answer

.MODEL SMALL .STACK 100H .DATA MSG_1 EQU 'Enter the Hex digit (A-F) : $' MSG_2 EQU 0DH,0AH,'The corresponding Decimal dgit is : $' PROMPT_1 DB MSG_1 PROMPT_2 DB MSG_2 .CODE MAIN PROC MOV AX, @DATA ; initialize DS MOV DS, AX LEA DX, PROMPT_1 ; load and display PROMPT_1 MOV AH, 9 INT 21H MOV AH, 1 ; read the hex digit INT 21H MOV BL, AL ; save the hex digit into BL LEA DX, PROMPT_2 ; load and display PROMPT_2 MOV AH, 9 INT 21H MOV AH, 2 ; display the first decimal digit i.e. 1 MOV DL, 31H INT 21H SUB BL, 11H ; convert the character into second digit MOV DL, BL ; display the second digit INT 21H MOV AH, 4CH ; return control to DOS INT 21H MAIN ENDP END MAIN

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