PROCEDURE TO DISPLAY CHARACTERS IN MEMORY

;********************************************************************************************************************
;*                       AUTHOR: ANUEBUNWA VICTOR OGECHUKWU                                                         *
;*                                                                                                                  *
;*                    PROCEDURE TO DISPLAY CHARACTERS IN MEMORY                                                     *
;* Procedure DISPLAY displays characters in memory starting from a given address till it encounters CARRIAGE-RETURN.*
;* ............................................HOW TO USE.......................................................... *
;* (1) Load the starting address of the memory into SI register.                                                    *
;* (2) Call DISPLAY.                                                                                                *
;********************************************************************************************************************

;         SAMPLE PROGRAM
.MODEL SMALL
.STACK
.DATA
    AVON DB ?
.CODE
START:      MOV AX, @DATA
            MOV DS, AX

            MOV AH, 3FH             ;Input string function
            LEA DX, AVON
            INT 21H

            LEA SI, AVON
            CALL DISPLAY

            MOV AH, 4CH
            INT 21H

;;Procedure DISPLAY
DISPLAY PROC
            PUSH AX
            PUSH DX
            PUSH SI
            PUSHF

            MOV AH, 02H
DLOOP1:     MOV DL, [SI]            ;Moves character at current address to DL
            CMP DL, 13
            JE XDLOOP1              ;Exits loop if DL contains CARRIAGE-RETURN
            INT 21H                 ;Else, displays character
            INC SI                  ;Moves to next address
            JMP DLOOP1              ;Continues loop

XDLOOP1:    POPF
            POP SI
            POP DX
            POP AX
            RET
DISPLAY ENDP
;End of procedure DISPLAY

END START
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