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// commands for PS2
#define ENABLE_PS2	0xA8
#define KBD_STAT	0x64
#define MOUSE		0xD4
#define MOUSE_STREAM	0xF4
#define MOUSE_DISABLE	0xF5
#define KBD_CMD		0x60
#define DISABLE_KBD	0xAD
#define ENABLE_KBD	0xAE

// checks the port
void CheckPort()
{
	unsigned char temp;
	while( true )
	{
		temp = inportb( KBD_STAT );
		if( (  temp & 2 ) == 0 )
			break;
	}
}

// waits for the ouse buffer to be full
void MouseBufferFull()
{
	unsigned char temp;
	while( true )
	{
		temp = inportb( KBD_STAT );
		if( (  temp & 0x20 ) == 0 )
			break;
	}
}

// checks the mouse
char CheckMouse()
{
	unsigned char temp;
	temp = inportb( KBD_STAT );

	if( temp & 1 )
		return 0;
	else
		return 1;
}

// set the ps2 bytes
void PS2Set()
{
	// mouse enabled
	outportb( KBD_STAT, ENABLE_PS2 );
	CheckPort();
}

// waits for the mouse
void WaitMouse()
{
	outportb( KBD_STAT, MOUSE );
	CheckPort();
}

// sets the streaming mode
void StartStream()
{
	WaitMouse();
	outportb( KBD_CMD, MOUSE_STREAM );
	CheckPort();
	CheckMouse();
}

// disables the keyboard
void DisableKeyboard()
{
	outportb( KBD_STAT, DISABLE_KBD );
	CheckPort();
}

// enables the keyboard
void EnableKeyboard()
{
	outportb( KBD_STAT, ENABLE_KBD );
	CheckPort();
}

// wait for the mouse - this is in the OSFAQ (http://www.osdev.org/osfaq2)
void MouseWait( char thetype )
{
	long timeout = 100000;
	if( thetype == 0 )
	{
		while( timeout-- )
		{
			if( inportb( 0x64 ) & 1 )
			{
				return;
			}
		}
		return;
	}
	if( thetype == 1 )
	{
		while( timeout-- )
		{
			if( ( inportb( 0x64 ) & 2 ) == 0 )
			{
				return;
			}
		}
		return;
	}
}

// get a byte from the port
char GetByte()
{
	MouseWait( 0 );
	char ret = inportb( 0x60 );

	return ret;
}

// info
int readable = 0;

// data pointer
MOUSEDATA LocalData;

// irq handler for the mouse
void MouseIRQ( struct regs* r )
{
	LocalData.status = GetByte();
	LocalData.xcoord = GetByte();
	LocalData.ycoord = GetByte();

	readable = 1;
}

// installs the IRQ
void InstallMouseIRQ()
{
	// enable the irq
	outportb( 0x64, 0x20 );
	KeyContWaitReady();
	unsigned char c = inportb( 0x60 ) | 2;
	outportb( 0x64, 0x60 );
	KeyContWaitReady();
	outportb( 0x60, c );

	// install the irq handler
	irq_install_handler( 12, MouseIRQ );
}

// get data from the mouse
void GetMouseData( MOUSEDATA* data )
{
	// is there data?
	if( ! readable )
	{
		// there's no data yet, so just make no movement
		*data.status = 0;
		*data.xcoord = 0;
		*data.ycoord = 0;
		
		// go back to caller
		return;
	}
	
	// disable interrupts
	__asm__ __volatile__ ( "cli" );

	// readable is false now
	readable = 0;

	// get the important stuff
	LocalData.leftbut = LocalData.status & 1;
	LocalData.rightbut = ( LocalData.status & 2 ) >> 1;
	LocalData.midbut = ( LocalData.status & 4 ) >> 2;
	LocalData.xsign = ( LocalData.status & 16 ) >> 4;
	LocalData.ysign = ( LocalData.status & 32 ) >> 5;
	LocalData.xover = ( LocalData.status & 64 ) >> 6;
	LocalData.yover = ( LocalData.status & 128 ) >> 7;

	// return the data
	*data = LocalData;
	
	// enable interrupts
	__asm__ __volatile__ ( "sti" );
}

// init the mouse
void InitMouse()
{
	PS2Set();
	InstallMouseIRQ();
	StartStream();
}

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typedef struct tagMOUSEDATA
{
	char xover;
	char yover;
	char xsign;
	char ysign;
	char midbut;
	char rightbut;
	char leftbut;
	char status;
	char xcoord;
	char ycoord; 
} MOUSEDATA;

// init the mouse
void InitMouse();

// get data from the mouse
void GetMouseData( MOUSEDATA* data );

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MOUSEDATA m;
GetMouseData( &m );

MouseX += ( m.xcoord * 1 );
MouseY += ( m.xcoord * -1 );

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; --------------------------------------------------
%MACRO INVOKE 1-*
  %REP    %0 - 1
    %ROTATE   -1
    PUSH    DWORD %1
  %ENDREP
  %ROTATE -1
  CALL    %1
%ENDMACRO
; --------------------------------------------------

Code: Select all

        void readMouse()
        {
            readMouse = !readMouse;
            short ack;
            short[] data = new short[10];
            int i;

            while (readMouse)
            {
                //Set mouse command: read mouse data packet 
                while ((Inp32(0x64) & 0x02) != 0) ; //Wait Input Buffer empty 
                Out32(0x64, 0xD4); // 0xD4

                //Send read command to mouse 
                while ((Inp32(0x64) & 0x02) != 0) ; //Wait Input Buffer empty 
                Out32(0x60, 0xEB);

                //Send GET PACK to mouse 
                //Wait aux data... (This loops forever... i tryed a delay instead)
                while ((Inp32(0x64) & 0x21) != 0x21) ; 

                ack = Inp32(0x60);   //should be 0xFA if OK 
               // I get ack=0xFE (resend) instead of 0xFA...

                //Get packet of 4 bytes 
                if (ack == 0xFA) 
                {
                    for (i = 0; i < 4; ++i)
                    {
                        //Wait aux data, again it loops forever...
                        //I tryed a delay instead..
                        while ((Inp32(0x64) & 0x21) != 0x21) ; 

                        data[i] = Inp32(0x60); //read next packet byte 
                    }

                    if ((data[0] & 0x01) != 0) {left button pressed...}
                    if ((data[0] & 0x02) != 0) {right button pressed...}
                }
            }    
        }