DOS XMS library is a DOS real mode and large memory model C library. Because DOS is ran under real mode, programmer only can access RAM under 1MB-DOS XMS library is a real mode DOS and large m emory model C library. Because ran under DOS is r Leverag

#include <reg52.h> //52系列单片机头文件 #define uchar unsigned char #define uint unsigned int sfr WDT_CONTR=0xe1 sbit led1=P0^0 sbit leds=P1^4 //led使能 void delayms(uint xms) { uint i,j for(i=xms i>0 i-