(1)MOV 2[DI], relative addressing of BX register [10020h+di+2]

(2)MOV [BP+DI+2], AX relative to base address index addressing [20020h+bp+di+2]

(3)MOV DS:[22H], BX direct addressing [10020h+22h].

(4) Add [BX], CX registered indirect address [10020h+bx].

(5)SUB ES:[DI], and the AX register indirectly addresses [40020h+di].

2。

(1)ADD 2, AX The first operand cannot be an immediate number.

(2) Push BL only by 16 digits,

(3) mov [di+si] and dx are not addressed correctly.

(4)SUB 2[DX], AXDX cannot be used for addressing.

⑤MOV DS, AX is correct.

3.

mov al，[buf+ 1]

mov [buf+2]，al

Mov bx, offset buffer

Company bx

Mobile aluminum, [bx]

Company bx

mov [bx]，al

Mov bx, offset buffer

mov si， 1

mov al，[bx+si]

Company si

mov [bx+si]，al