直接使用BIOS服务的打印机I/O

[c]代码库

#include <stdio.h>
#include <conio.h>
#include <bios.h>

int main ( void )
{
#define STATUS  2    /* printer status command */
#define PORTNUM 0    /* port number for LPT1 */

	int status, abyte=0;

	printf ( "Please turn off your printer.  Press any key to continue\n" );
	getch();
	status = biosprint ( STATUS, abyte, PORTNUM );
	if ( status & 0x01 )
		printf ( "Device time out.\n" );
	if ( status & 0x08 )
		printf ( "I/O error.\n" );

	if ( status & 0x10 )
		printf ( "Selected.\n" );
	if ( status & 0x20 )
		printf ( "Out of paper.\n" );

	if ( status & 0x40 )
		printf ( "Acknowledge.\n" );
	if ( status & 0x80 )
		printf ( "Not busy.\n" );

	return 0;
}