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Code: Select all

_mouse_int:
        push eax
        push edi
        push ecx
        push ebx

        movzx ebx,byte [_mouse_in]
        lea edi,[_mouse_data]

              in al,0x60
              mov [edi+ebx],byte al
              inc ebx
              cmp ebx,0x03
              jb .mouse_out_pre

              mov ch,byte [edi]     ;multi infor byte
              mov [_mouse_button],byte ch   ;store mouse button info
              test ch,0x40          ;check for X overflow
              jz .no_x_overflow
              mov [_mouse_dx],byte 0xff ;maximum x value
              jmp .check_y_overflow

.mouse_out_pre:
                jmp .mouse_out

.no_x_overflow:
              mov cl,byte [edi+0x01]  ;get change in x byte
              mov [_mouse_dx],byte cl

.check_y_overflow:
              test ch,0x80           ;check for Y overflow
              jz .no_y_overflow
              mov [_mouse_dy],byte 0xff ;sign bit set so 255 is maximum
              jmp .check_x_sign

.no_y_overflow:
              mov cl,byte [edi+0x02]   ;get change in y byte
              mov [_mouse_dy],byte cl

.check_x_sign:
               test ch,0x10
               jz .positive_x
               movsx eax,byte [_mouse_dx]
               jmp .check_y_sign
.positive_x:
               movzx eax,byte [_mouse_dx]
.check_y_sign:
               test ch,0x20
               jz .positive_y
               movsx ecx,byte [_mouse_dy]
               jmp .going_out
.positive_y:
               movzx ecx,byte [_mouse_dy]
.going_out:
               mov ebx,0
               add [_mouse_x],word ax
               neg cx
               add [_mouse_y],word cx

               push dword [_mouse_semaphore]
               call _wake
               pop eax
.mouse_out:
        mov [_mouse_in],byte bl

        mov al,0x20
        out 0xa0,al
        out 0x20,al

        pop ebx
        pop ecx
        pop edi
        pop eax

        iret
        jmp $

Code: Select all

void initialize_mouse()
{
  unsigned char data;
  while(test_keyboard_data())
       inportb(0x60);

  wait_keyboard();
  outportb(0x64,0xa8); /*tell controller to enable AUX interface*/
  wait_keyboard();

  outportb(0x64,0xd4); /*tell controller to send next command to Aux device*/
  wait_keyboard();
  outportb(0x60,0xea); /*tell device to enable itself*/
  wait_keyboard_data();

 if(test_keyboard_data())
    printf("KEYBOARD ACK 3 [%02x]\n",inportb(0x60));

  outportb(0x64,0x20); /*read command byte*/
  wait_keyboard_data();

 data=inportb(0x60);
 printf("Data: [%02x]",data);
 data=data|0x43;
 printf("                Data: [%02x]",data);

  outportb(0x64,0x60); /*write command byte*/
  wait_keyboard();
  outportb(0x60,data);

  wait_keyboard();

  k_memset(mouse_data,0,sizeof(mouse_data));

  outportb(0x64,0xd4); /*tell controller to send next command to Aux device*/
  wait_keyboard();

  outportb(0x60,0xf4); /*reset mode*/
  wait_keyboard_data();
 if(test_keyboard_data())
    printf("KEYBOARD ACK 4 [%02x]\n",inportb(0x60));

  inportb(0x60);
  while(test_keyboard_data())
       inportb(0x60);

  kenable_level(12);
return;
}