getlsr.c

异步通讯C语言例行子程序

/* A module of ASYNCx.LIB version 1.02 */

#include <dos.h>
#include "asyncdef.h"

/**************************************************************
 Return the value of the Line Status Register. If the
 specified port is not open, return -1.
 **************************************************************/

int a_getlsr(ASYNC *p)
{if (p)
   return(inportb(p->base+LSR));
 return -1;
} /* end of a_getlsr(p) */