汇编内容

最近在工作中遇到的汇编
DX：数字寄存器
AL:8位寄存器累加器

MOV A B ；A赋值为B if(A!=B) A=B
==以下是代码
EC_Command_Port = 0x29Ah
EC_Data_Port = 0x299h
Write EC HW ram = 0x89
Watch dog event flag = 0x57
Watchdog reset delay time = 0x5E
Reset event = 0x04
Start WDT function = 0x28
.model small
.486p
.stack 256
.data
.code
org 100h
.STARTup
mov dx, EC_Command_Port
mov al,89h ; Write EC HW ram.
out dx,al;
mov dx, EC_Data_Port
mov al, 5Fh ; Watchdog reset delay time low byte (5Eh is high byte) index.
out dx,al
mov dx, EC_Data_Port
mov al, 30h ;Set 3 seconds delay time.
out dx,al
mov dx, EC_Command_Port
mov al,89h ; Write EC HW ram.
out dx,al
mov dx, EC_Data_Port
mov al, 57h ; Watch dog event flag.
out dx,al
mov dx, EC_Data_Port
mov al, 04h ; Reset event.
out dx,al
mov dx, EC_Command_Port
mov al,28h ; start WDT function.
out dx,al
.exit
END