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Turbo C 2.0、Borland C++库函数及用例(6) 用 法: int bdosptr( int dosfun, void *argument,
unsigned dosal );
程序例:#include <string.h>
#include <stdio.h>
#include <dir.h>
#include <dos.h>
#include <errno.h>
#include <stdlib.h>#define BUFLEN 80int main(void)
{
char buffer[BUFLEN];
int test; printf("Enter full pathname of a directory\n");
gets(buffer); test = bdosptr(0x3B,buffer,0);
if(test)
{ printf("DOS error message: %d\n", errno);
/* See errno.h for error listings */
exit (1);
} getcwd(buffer, BUFLEN);
printf("The current directory is: %s\n", buffer); return 0;
}
函数名: bioscom
功 能: 串行I/O通信
用 法: int bioscom(int cmd, char abyte, int port);
程序例:
#include <bios.h>
#include <conio.h>#define COM1 0
#define DATA_READY 0x100
#define TRUE 1
#define FALSE 0#define SETTINGS ( 0x80 0x02 0x00 0x00)int main(void)
{
int in, out, status, DONE = FALSE; bioscom(0, SETTINGS, COM1);
cprintf("... BIOSCOM [ESC] to exit ...\n");
while (!DONE)
{
status = bioscom(3, 0, COM1);
if (status & DATA_READY)
if ((out = bioscom(2, 0, COM1) & 0x7F) != 0)
putch(out); if (kbhit())
{
if ((in = getch()) == '\x1B')
DONE = TRUE;
bioscom(1, in, COM1);
}
}
return 0;
}
函数名: biosdisk
功 能: 软硬盘I/O
用 法: int biosdisk( int cmd,int drive,int head,int track,
int sector,int nsects, void *buffer);
程序例:#include <bios.h>
#include <stdio.h>int main(void)
{
int result;
char buffer[512]; printf("Testing to see if drive a: is ready\n");
result = biosdisk(4,0,0,0,0,1,buffer);
result &= 0x02;
(result) ? (printf("Drive A: Ready\n")) :
(printf("Drive A: Not Ready\n"));
return 0;
}
函数名: biosequip
功 能: 检查设备
用 法: int biosequip(void);
程序例:#include <bios.h>
#include <stdio.h>int main(void)
{
int result;
char buffer[512]; printf("Testing to see if drive a: is ready\n");
result = biosdisk(4,0,0,0,0,1,buffer);
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