MAMEWorld Forums - Programming - Re: Need help with Cruis'n World driver

Thank you, the code now works 100% !!

One step further: what if i want the first button to cicle between wievs (like it does) AND i want button 2, 3 and 4 work again?

I made some (unsuccesful

) trials. First of all, i tried by re-defining the 3 buttons:

Code:


   PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2) PORT_NAME("View Change/View 1")    /* view 1 */
    PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(2)    PORT_NAME("View 2")/* view 2 */
    PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(2)    PORT_NAME("View 3")/* view 3 */
    PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_PLAYER(2)    PORT_NAME("View 4")/* view 4 */

This, alone, doesn't work (like expected): the function "port1_r" only controls one button.

Then i made a first try (here is the full function with only one button defined but can be easily ported to all the buttons):

Code:


static READ32_HANDLER( port1_r )
  {
  static UINT8 cur_view = 0;
  static UINT8 last_val = 0;
  static UINT16 last_data = 0;

  UINT16 viewval = readinputport(1); //total actual values stored in memory
  UINT8 button_pressed = viewval & 0x0010;
  UINT8 button2_pressed = viewval & 0x0020;
//  UINT8 button3_pressed = viewval & 0x0040;
//  UINT8 button4_pressed = viewval & 0x0080;

  if (last_val==button_pressed)
  return ((last_data << 16) | last_data);

  if (!button_pressed ) // check if button is pressed
  {
  cur_view++;
  if (cur_view == 4)
  cur_view = 0;
  viewval = (viewval | 0xf0);

  switch (cur_view)
  {
  case 0:
  viewval = viewval & 0xef;
  break;
  case 1:
  viewval = viewval & 0xdf;
  break;
  case 2:
  viewval = viewval & 0xbf;
  break;
  case 3:
  viewval = viewval & 0x7f;
  break;
  }

  }

  last_val=button_pressed;
  last_data = viewval;
  return (viewval << 16) | viewval;
 
if (!button2_pressed ) // check if button "view 2" is pressed
  {
  cur_view = 1;
  viewval = (viewval | 0xf0) & 0xdf;             
  }  
  return (viewval << 16) | viewval;                 
}

Not working: only the "old" cycling is detected.

I made a second try, with the code section controlling the button press like:

Code:


if (!button2_pressed ) // check if button "view 2" is pressed
  {
  cur_view = 1;
  viewval = (viewval | 0xf0) & 0xdf;             
  }  
  return (readinputport(1) << 16) | readinputport(1);

Still not working, like before ... consider that the original code (the "4 buttons, one for each view")was

Code:


static READ32_HANDLER( port1_r )
 {
return (readinputport(1) << 16) | readinputport(1); 
}

What's wrong? Thanks for the lesson !