86Box/src/lpt.c

/* Copyright holders: Sarah Walker
   see COPYING for more details
*/
#include "ibm.h"
#include "io.h"

#include "lpt.h"

static uint8_t lpt1_dat, lpt2_dat, lpt3_dat;
static uint8_t lpt1_ctrl, lpt2_ctrl, lpt3_ctrl;

void lpt1_write(uint16_t port, uint8_t val, void *priv)
{
        switch (port & 3)
        {
                case 0:
                lpt1_dat = val;
                break;
                case 2:
                lpt1_ctrl = val;
                break;
        }
}
uint8_t lpt1_read(uint16_t port, void *priv)
{
        switch (port & 3)
        {
                case 0:
                return lpt1_dat;
                case 2:
                return lpt1_ctrl;
        }
        return 0xff;
}

void lpt2_write(uint16_t port, uint8_t val, void *priv)
{
        switch (port & 3)
        {
                case 0:
                lpt2_dat = val;
                break;
                case 2:
                lpt2_ctrl = val;
                break;
        }
}
uint8_t lpt2_read(uint16_t port, void *priv)
{
        switch (port & 3)
        {
                case 0:
                return lpt2_dat;
                case 2:
                return lpt2_ctrl;
        }
        return 0xff;
}

void lpt3_write(uint16_t port, uint8_t val, void *priv)
{
        switch (port & 3)
        {
                case 0:
                lpt3_dat = val;
                break;
                case 2:
                lpt3_ctrl = val;
                break;
        }
}
uint8_t lpt3_read(uint16_t port, void *priv)
{
        switch (port & 3)
        {
                case 0:
                return lpt3_dat;
                case 2:
                return lpt3_ctrl;
        }
        return 0xff;
}

uint16_t lpt_addr[3] = { 0x378, 0x278, 0x3bc };

void lpt_init()
{
	if (lpt_enabled)
	{
	        io_sethandler(0x0378, 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
        	io_sethandler(0x0278, 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
		lpt_addr[0] = 0x378;
		lpt_addr[1] = 0x278;
	}
}

void lpt1_init(uint16_t port)
{
	if (lpt_enabled)
	{
	        io_sethandler(port, 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
		lpt_addr[0] = port;
	}
}
void lpt1_remove()
{
	if (lpt_enabled)
	{
	        io_removehandler(lpt_addr[0], 0x0003, lpt1_read, NULL, NULL, lpt1_write, NULL, NULL,  NULL);
	}
}
void lpt2_init(uint16_t port)
{
	if (lpt_enabled)
	{
	        io_sethandler(port, 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
		lpt_addr[1] = port;
	}
}
void lpt2_remove()
{
	if (lpt_enabled)
	{
	        io_removehandler(lpt_addr[1], 0x0003, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
	}
}

void lpt2_remove_ams()
{
	if (lpt_enabled)
	{
	        io_removehandler(0x0379, 0x0002, lpt2_read, NULL, NULL, lpt2_write, NULL, NULL,  NULL);
	}
}

void lpt3_init(uint16_t port)
{
	if (lpt_enabled)
	{
	        io_sethandler(port, 0x0003, lpt3_read, NULL, NULL, lpt3_write, NULL, NULL,  NULL);
		lpt_addr[2] = port;
	}
}
void lpt3_remove()
{
	if (lpt_enabled)
	{
	        io_removehandler(lpt_addr[2], 0x0003, lpt3_read, NULL, NULL, lpt3_write, NULL, NULL,  NULL);
	}
}