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Code: Select all

/* CakeOS */
#include <system.h>

//Mouse Driver
//Some code based on code by SANiK
volatile unsigned char mouse_cycle=0;
volatile char mouse_byte[3];
volatile int mouse_x=0;
volatile unsigned char mouse_y=0;
static int dx, dy;
static char cursor[8] = {0xf0, 0xe0, 0xe0, 0x90, 0x8, 0x0, 0x0, 0x0};

//Static functions prototypes
static void mouse_wait(unsigned char a_type);
static unsigned char mouse_read();
static void mouse_write(unsigned char a_write);

extern int graphical_mode;
extern int g_wd, g_ht;


//Mouse functions
static void mouse_handler(registers_t regs)
{
  if(!graphical_mode)
       return;
  switch(mouse_cycle)
  {
    case 0:
      mouse_byte[0]=inb(0x60);
      mouse_cycle++;
      break;
    case 1:
      mouse_byte[1]=inb(0x60);
      mouse_cycle++;
      break;
    case 2:
      mouse_byte[2]=inb(0x60);
      //mouse_x=mouse_byte[1];
      //mouse_y=mouse_byte[2];
      mouse_cycle=0;
      
      dx = (mouse_byte[0] & 0x10) ? mouse_byte[1] - 256 : mouse_byte[1];
      dy = (mouse_byte[0] & 0x20) ? -(mouse_byte[2] - 256) : -mouse_byte[2];

      if (dx > 5 || dx < -5)
	     dx *= 4;
      if (dy > 5 || dy < -5)
	     dy *= 4;

       mouse_x += dx;
       mouse_y += dy;

       if (mouse_x > g_wd) mouse_x = g_wd;
       if (mouse_x < 1) mouse_x = 1;
       if (mouse_y > g_ht) mouse_y = g_ht;
       if (mouse_y < 1) mouse_y = 1;
      
      break;
  }
  
  int i, l;
  int j = mouse_x;
  int h = mouse_y;
  int c;
  
  //Print mouse - TODO: mouse
  refresh_screen();
  	for (l = 0; l < 8; l++)
	{
		for (i = 8; i > 0; i--)
		{
			if ((cursor[l] & (1<<i)))
				c = 9;
			else
				c = g_read_pixel(j, h);		// Don't overwrite background
			g_put_pixel(j++, h, c);
		}
		h++;
		j = mouse_x;
	}
}

static void mouse_wait(unsigned char a_type)
{
  unsigned int _time_out=100000;
  if(a_type==0)
  {
    while(_time_out--) //Data
    {
      if((inb(0x64) & 1)==1)
      {
        return;
      }
    }
    return;
  }
  else
  {
    while(_time_out--) //Signal
    {
      if((inb(0x64) & 2)==0)
      {
        return;
      }
    }
    return;
  }
}

static void mouse_write(unsigned char a_write)
{
  //Wait to be able to send a command
  mouse_wait(1);
  //Tell the mouse we are sending a command
  outb(0x64, 0xD4);
  //Wait for the final part
  mouse_wait(1);
  //Finally write
  outb(0x60, a_write);
}

static unsigned char mouse_read()
{
  //Get's response from mouse
  mouse_wait(0);
  return inb(0x60);
}

void init_ps2_mouse()
{
  unsigned char _status;
 
  //Enable the auxiliary mouse device
  mouse_wait(1);
  outb(0x64, 0xA8);
 
  //Enable the interrupts
  mouse_wait(1);
  outb(0x64, 0x20);
  mouse_wait(0);
  _status=(inb(0x60) | 2);
  mouse_wait(1);
  outb(0x64, 0x60);
  mouse_wait(1);
  outb(0x60, _status);
 
  //Tell the mouse to use default settings
  mouse_write(0xF6);
  mouse_read();  //Acknowledge
 
  //Enable the mouse
  mouse_write(0xF4);
  mouse_read();  //Acknowledge

  //Setup the mouse handler
  register_interrupt_handler(IRQ12, &mouse_handler);
} 

int detect_ps2_mouse()
{
    unsigned char tmp = mouse_read();
    if(tmp != 0xFA)
         return 0; //No mouse
    else
         return 1; //Mouse there
}

Code: Select all

 
install_int0x12:
cli
push ds
xor ax,ax
mov ds,ax
mov  WORD[ds:74h*4+0],m_hn
mov WORD[ds:74h*4+2],cs
pop ds
sti
;some more code here
;m_hn is address of handler label