PRINT A HALF PIRAMID UPSIDE DOWN

.DATA
MSG1 DB "PRINT A HALF PIRAMID UPSIDE DOWN$"
MSG2 DB 10,13,"ENTER A NUMBER: $"
R DB ?
C DB ?

.CODE
MAIN PROC
    MOV AX,DATA
    MOV DS,AX
    INT 21H

    ;PRINT MSG1
    MOV AH,9
    MOV DX,OFFSET MSG1
    INT 21H

    ;PRINT MSG2
    MOV AH,9
    MOV DX,OFFSET MSG2
    INT 21H

    ;INPUT TO R
    MOV AH,1
    INT 21H
    SUB AL,30H
    MOV R,AL

    MOV C,AL


    MOV DL,10 ;NEW LINE
    MOV AH,2
    INT 21H

    MOV DL,13 ;CARRIAGE RETURN
    MOV AH,2
    INT 21H

    MOV CL,R

    TOP:
    MOV R,CL
    MOV CL,C

    TOP1:
    MOV DL,42 ;PRINT STAR
    MOV AH,2
    INT 21H
    LOOP TOP1

    MOV DL,10 ;NEW LINE
    MOV AH,2
    INT 21H

    MOV DL,13 ;CARRIAGE RETURN
    MOV AH,2
    INT 21H

    DEC C
    MOV DL,R
    MOV CL,DL
    LOOP TOP

    MOV AH,4CH
    INT 21H

ENDP
END MAIN