如何使用汇编语言实现多态和重载？

Question

请问，有人知道如何用汇编语言编写代码重载吗？我有错误：

(70),(72) A4057: Illegal size for operand

错误代码：

mov   ax, offset ob1.DRAW
mov   _this.DRAW, ax      //(70)
mov   ax, seg ob1.DRAW
mov   _this.DRAW+2, ax    //(72)

我尝试执行与此非常相似的程序（示例14）： http://www.drdobbs.com/embedded-systems/object-oriented-programming-in-assembly/184408319

我的代码：

    .MODEL SMALL
dseg            segment byte public 'data'
_This           equ     es:[bx]         ;Provide a mnemonic name for THIS.
Shape_Draw PROC FAR
    MOV   AX,@DATA
    MOV   DS,AX
    LEA DX,MSG3         ;print msg3
    MOV AH,09H
    INT 21H
    RET
Shape_Draw ENDP

Rect_Draw PROC FAR
    MOV   AX,@DATA
    MOV   DS,AX
    LEA DX,MSG1         ;print msg1
    MOV AH,09H
    INT 21H
    RET
Rect_Draw ENDP

Circle_Draw PROC FAR
    MOV   AX,@DATA
    MOV   DS,AX
    LEA DX,MSG2         ;print msg2
    MOV AH,09H
    INT 21H
    RET
Circle_Draw ENDP

Shape    struc
ix       dw      ?     ;Wspolrzedna X
iy       dw      ?     ;Wspolrzedna Y
Draw     dd      Shape_Draw     ;Default (overridden) DRAW routine
Shape    ends
;
Rect     struc
         dw      2 dup (?)      ;Reserve space 
         dd      Rect_Draw      ;Draw a rectangle
Rect     ends
;
Circle   struc
         dw      2 dup (?)      ;Reserve space 
         dd      Circle_Draw    ;Draw a circle
Circle   ends

dseg        ends
.DATA
MSG1   DB  "Klasa RECT: ",'$'
MSG2   DB  "Klasa CIRCLE: ",'$'
MSG3   DB  "Klasa SHAPE: ",'$'
ob1     Shape       <'1','1'>
ob11        Shape       <'2','2'>
ob2     Rect        <,>
ob3     Circle      <,>


cseg        segment byte public 'CODE'
        assume  cs:cseg, ds:dseg, es:dseg

main:  

mov      bx, seg ob1
mov      es, bx
mov      bx, offset ob1
call     ob1.Draw          ;Assuming S1 is in the data seg


mov   ax, offset ob1.DRAW
mov   _this.DRAW, ax
mov   ax, seg ob1.DRAW
mov   _this.DRAW+2, ax



MOV AH,4CH 
    INT 21H
END

cseg end

我不懂汇编语言。 :(我将代码插入C ++中，以解释我想要做什么。

    class Figura{
    public:
    int x=2;
    int y=3;
    virtual void draw();
};
class Rect :public Figura{
    public:
    void draw(){
        cout << "RECT DRAW" << endl;
    };
};

int main()
{
    Rect object;
    object.draw();
    return 0;
}