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1、#include #include #include #include #define COM232 0x2f8#define COMINT 0x0b#define MaxBufLen 500#define Port8259 0x20#define EofInt 0x20static int comportaddr;static char intvectnum;static unsigned char maskb;static unsigned char BufferMaxBufLen;static int CharsInBuf,CircIn,CircOut;static void (inte
2、rrupt far *OldAsyncInt)();static void interrupt far AsyncInt(void);void Init_COM(int ComPortAddr, unsigned char IntVectNum, int Baud, unsigned char Data, unsigned char Stop, unsigned char Parity)unsigned char High,Low;int f;comportaddr=ComPortAddr;intvectnum=IntVectNum;CharsInBuf=0;CircIn=0;CircOut=
3、0;f=(Baud/100);f=1152/f; High=f/256;Low=f-High*256;outp(ComPortAddr+3,0x80);outp(ComPortAddr,Low);outp(ComPortAddr+1,High);Data=(Data-5)|(Stop-1)*4);if(Parity=2) Data=Data|0x18;else if(Parity=1) Data=Data|0x8;outp(ComPortAddr+3,Data);outp(ComPortAddr+4,0x0a);outp(ComPortAddr+1,0x01);disable();OldAsy
4、ncInt=getvect( IntVectNum );setvect( IntVectNum, AsyncInt );enable();maskb=inp(Port8259+1);if(IntVectNum=0x0c)outp(Port8259+1,maskb&0xef);else outp(Port8259+1,maskb&0xf7);static void interrupt far AsyncInt(void)disable();if(CharsInBufMaxBufLen) BufferCircIn=inp(comportaddr);if(CircIn0) (*Char)=Buffe
5、rCircOut; if(CircOutMaxBufLen-1)CircOut+; else CircOut=0; CharsInBuf-; Flag=0; return Flag;int SendChar(unsigned char Char)if(inp(comportaddr+5)&0x20)=0) return -1;outp(comportaddr,Char);return 0;main()int i,c;unsigned char InChar;Init_COM(COM232,COMINT,1200,8,1,0);while(1) if(kbhit() if(InChar=getch()=27)break; else while(SendChar(InChar); if(GetCharInBuf(&InChar)=0) printf(%c,InChar);Restore();