#include	<stdio.h>
#include	<conio.h>
#include	<dos.h>
#include	<time.h>
#include	"pcbios.h"
#define		RAMIO
#include	"ramio.h"
#undef		RAMIO


/*	LOW level I/O routine	*/

	/*	port	*/

void	get_lpt()
{
	unsigned int	far *bios_data;

	FP_SEG(bios_data) = 0x40;

	FP_OFF(bios_data) = 0x08;
	lpt_addr[1] = *bios_data;

	FP_OFF(bios_data) = 0x0a;
	lpt_addr[2] = *bios_data;

	FP_OFF(bios_data) = 0x0c;
	lpt_addr[3] = *bios_data;

/*
	FP_OFF(bios_data) = 0x0e;
	lpt_addr[4] = *bios_data;
*/
	lpt_addr[4] = (unsigned int)0x0000;

	lpt_num = 0;

	return;
}


int	initport()
{
	if(lpt_addr[lpt_num] == 0x0000)
		return 1;

	direction = DIRAT;

	outp(CONTROLP,cport[direction][PORTSTBY]);
	twait();
	outp(DATAP,0xff);
	twait();

	return 0;
}


void	ramdir(int dir)
{
	direction = dir;

	outp(CONTROLP,cport[dir][PORTSTBY]);
	twait();

	return;
}


void	addrinc(void)
{
	outp(CONTROLP,cport[direction][PORTAINC]);
	twait();
	outp(CONTROLP,cport[direction][PORTSTBY]);
	twait();

	return;
}


void	ramwrite(int data)
{
	outp(DATAP,data);
	twait();
	outp(CONTROLP,cport[direction][PORTWR]);
	twait();
	outp(CONTROLP,cport[direction][PORTSTBY]);
	twait();

	return;
}


void	addrclr(void)
{
	outp(CONTROLP,cport[direction][PORTCLR]);
	twait();
	outp(CONTROLP,cport[direction][PORTSTBY]);
	twait();

	return;
}


void	twait()
{
	static long	l = 0;

	if(l < 7)
	{
		l++;
		twait();
		l--;
	}

	return;
}