ftp.nice.ch/pub/next/tools/emulators/vice.0.15.0.NeXT.sd.tgz#/vice-0.15.0/src/pruser.c

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/*
 * pruser.c - Printer device for userport.
 *
 * Written by
 *  André Fachat        (a.fachat@physik.tu-chemnitz.de)
 *
 * This file is part of VICE, the Versatile Commodore Emulator.
 * See README for copyright notice.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 *  02111-1307  USA.
 *
 */

#include "vice.h"

#include <stdio.h>

#include "types.h"
#include "print.h"
#include "pruser.h"
#include "resources.h"
#include "cmdline.h"

static BYTE value;		/* userport value */
static int strobe;
static int fd;

/***********************************************************************
 * resource handling
 */

static int userport_printer_enabled = 0;
static int userport_printer_device;

static int set_up_enabled(resource_value_t v)
{
    int newval = ((int) v) ? 1 : 0;

    if (newval && !userport_printer_enabled) {
	/* switch printer on */
	fd = print_open(userport_printer_device);
	if (fd>=0) {
            userport_printer_enabled = 1;
	}
    }
    if (userport_printer_enabled && !newval) {
	print_close(fd);
	userport_printer_enabled = 0;
    }

    return 0;
}

static int set_up_device(resource_value_t v) {
    userport_printer_device = (int) v;
    return 0;
}

static resource_t resources[] = {
    { "PrUser", RES_INTEGER, (resource_value_t) 0,
      (resource_value_t *) &userport_printer_enabled, set_up_enabled },
    { "PrUserDev", RES_INTEGER, (resource_value_t) 0,
      (resource_value_t *) &userport_printer_device, set_up_device },
    { NULL }
};

int pruser_init_resources(void)
{
    return resources_register(resources);
}

static cmdline_option_t cmdline_options[] = {
    { "-pruser", SET_RESOURCE, 0, NULL, NULL, "PrUser",
        (resource_value_t) 1, NULL,
        "Enable the userport printer emulation" },
    { "+pruser", SET_RESOURCE, 0, NULL, NULL, "PrUser",
        (resource_value_t) 0, NULL,
        "Disable the userport printer emulation" },
    { "-pruserdev", SET_RESOURCE, 1, NULL, NULL, "PrUserDevice",
        (resource_value_t) 0,
      "<0-2>", "Specify VICE printer device for userport" },
    { NULL }
};

int pruser_init_cmdline_options(void)
{
    return cmdline_register_options(cmdline_options);
}

/*********************************************************************/


void userport_printer_write_data(BYTE b)
{
    value = b;
}

void userport_printer_write_strobe(int s)
{
    if (userport_printer_enabled && strobe && !s) {	/* hi->lo on strobe */
	print_putc(fd, value);

        userport_printer_set_busy(1);	/* signal lo->hi */
        userport_printer_set_busy(0);	/* signal hi->lo */
    }

    strobe = s;
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.