inportp.asm

在DOS下进行IO端口查看的小软件

;.386
.model small
.code
public _inport32

;code1  segment byte public 'CODE'  use16
_inport32 PROC NEAR
        push bp
        mov  bp,sp
        mov  dx,[bp+4]
        db   66h,0EDh     ;IN   EAX,DX
        db   66h,8Bh,0D0h ;MOV  edx,EAX      ;low  2 Bytes within AX
        mov  cl,16
        db   66h,0D3h,0EAh ;shr  edx,cl      ;high 2 Bytes  within DX
        pop bp
        ret
_inport32 endp

;code1  ends
         end