mouse.c

微操作系统（c＋＋）

/*
 *  LittleOS
 *  Copyright (C) 1998 Eran Rundstein ([e-mail])
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 ** Mouse driver 0.0.2
 ** Written by Eran Rundstein ([e-mail])
 ** For LittleOS

 ** Known Limitations:
 ** Only supports mice on COM port 1

*/

#include <kernel.h>

#define MOUSE_IRQ_COM1  4
#define MOUSE_IRQ_COM2  3

#define COM1_PORT       0x3f8
#define COM2_PORT       0x2f8

#define max_screen_x    79
#define max_screen_y    24


extern int c_x,c_y;


static unsigned int MOUSE_IRQ=MOUSE_IRQ_COM1;
static unsigned int MOUSE_COM=COM1_PORT;

static unsigned int     bytepos=0, coordinate;
static unsigned char    mpacket[3];
static signed int       mouse_x=40, mouse_y=12,mo_x=40,mo_y=12;
static unsigned char    mouse_button1, mouse_button2;
static signed int       horiz_sensitivity, vert_sensitivity;
static int    mo_c=0;


unsigned int microsoft_mouse_handler(unsigned long irq)
{
	unsigned int mbyte=inb(MOUSE_COM);
	int i;
	ushort *vid = (ushort *)VIDEO_ADDR;
	int scx,scy;

	scx=c_x;
	scy=c_y;
	
	vid[mo_x+mo_y*80]=mo_c;
	mo_c = vid[mouse_x+mouse_y*80];
	vid[mouse_x+mouse_y*80]=((int)'