Food Fight - joystick troubles, solved

mahoneyt944

So is Digital uses 0 to 255, 128 being center and analog uses 00 to FF, 7F being center? Correct?

I'll look into it at a later date. No hurry right now though.

grant2258

nope analog uses 0 - 255 as well the fist 0xff hex is (255 decimal) ff is the mask the second 0x7f is default center value. the min and max are at the end

mahoneyt944

@grant2258
@Cornervizion

Here's a true control fix for food fight that I'm calling "Live center - rev 3".

Turning on cheat input ports activates the code for analog joysticks without debounce delay. If you're using a digital joystick, you must also turn on grant2258's centering fix which will use the same fix that analog uses but with debounce delay.

Still some things I'd like to edit but I've had enough for today, probably a rev 4 coming soon though when I find more time. I plan to tighten up any dead zones for analog so every possible value is accounted for to be completely accuracy, its fairly close now though. I'd like to eventually implement this into an official driver for the game so it just finally "fixed" once and for all once it's perfect. Credit to grant2258 for his work done in the earlier code versions above that made this possible.

For now though here's the WIP foodf.c driver with fixes implemented:
Outdated

/***************************************************************************

	Atari Food Fight hardware

	driver by Aaron Giles

	Games supported:
		* Food Fight

	Known bugs:
		* none at this time

****************************************************************************

	Memory map

****************************************************************************

	========================================================================
	MAIN CPU
	========================================================================
	000000-00FFFF   R     xxxxxxxx xxxxxxxx   Program ROM
	014000-01BFFF   R/W   xxxxxxxx xxxxxxxx   Program RAM
	01C000-01CFFF   R/W   xxxxxxxx xxxxxxxx   Motion object RAM (1024 entries x 2 words)
	                R/W   x------- --------      (0: Horizontal flip)
	                R/W   -x------ --------      (0: Vertical flip)
	                R/W   ---xxxxx --------      (0: Palette select)
	                R/W   -------- xxxxxxxx      (0: Tile index)
	                R/W   xxxxxxxx --------      (1: X position)
	                R/W   -------- xxxxxxxx      (1: Y position)
	800000-8007FF   R/W   xxxxxxxx xxxxxxxx   Playfield RAM (32x32 tiles)
	                R/W   x------- --------      (Tile index MSB)
	                R/W   --xxxxxx --------      (Palette select)
	                R/W   -------- xxxxxxxx      (Tile index LSBs)
	900000-9001FF   R/W   -------- ----xxxx   NVRAM
	940000-940007   R     -------- xxxxxxxx   Analog input read
	944000-944007     W   -------- --------   Analog input select
	948000          R     -------- xxxxxxxx   Digital inputs
	                R     -------- x-------      (Self test)
	                R     -------- -x------      (Player 2 throw)
	                R     -------- --x-----      (Player 1 throw)
	                R     -------- ---x----      (Aux coin)
	                R     -------- ----x---      (2 player start)
	                R     -------- -----x--      (1 player start)
	                R     -------- ------x-      (Right coin)
	                R     -------- -------x      (Left coin)
	948000            W   -------- xxxxxxxx   Digital outputs
	                  W   -------- x-------      (Right coin counter)
	                  W   -------- -x------      (Left coin counter)
	                  W   -------- --x-----      (LED 2)
	                  W   -------- ---x----      (LED 1)
	                  W   -------- ----x---      (INT2 reset)
	                  W   -------- -----x--      (INT1 reset)
	                  W   -------- ------x-      (Update)
	                  W   -------- -------x      (Playfield flip)
	94C000            W   -------- --------   Unknown
	950000-9501FF     W   -------- xxxxxxxx   Palette RAM (256 entries)
	                  W   -------- xx------      (Blue)
	                  W   -------- --xxx---      (Green)
	                  W   -------- -----xxx      (Red)
	954000            W   -------- --------   NVRAM recall
	958000            W   -------- --------   Watchdog
	A40000-A4001F   R/W   -------- xxxxxxxx   POKEY 2
	A80000-A8001F   R/W   -------- xxxxxxxx   POKEY 1
	AC0000-AC001F   R/W   -------- xxxxxxxx   POKEY 3
	========================================================================
	Interrupts:
		IRQ1 = 32V
		IRQ2 = VBLANK
	========================================================================


***************************************************************************/


#include "driver.h"
#include "machine/atarigen.h"
#include "vidhrdw/generic.h"
#include "foodf.h"
#include "bootstrap.h"



/*************************************
 *
 *	Statics
 *
 *************************************/

static UINT8 whichport = 0;



/*************************************
 *
 *	NVRAM
 *
 *************************************/

static READ16_HANDLER( nvram_r )
{
	return ((data16_t *)generic_nvram)[offset] | 0xfff0;
}



/*************************************
 *
 *	Interrupts
 *
 *************************************/

static void update_interrupts(void)
{
	int newstate = 0;

	if (atarigen_scanline_int_state)
		newstate |= 1;
	if (atarigen_video_int_state)
		newstate |= 2;

	if (newstate)
		cpu_set_irq_line(0, newstate, ASSERT_LINE);
	else
		cpu_set_irq_line(0, 7, CLEAR_LINE);
}


static void scanline_update(int scanline)
{
	/* INT 1 is on 32V */
	if (scanline & 32)
		atarigen_scanline_int_gen();
}


static MACHINE_INIT( foodf )
{
	atarigen_interrupt_reset(update_interrupts);
	atarigen_scanline_timer_reset(scanline_update, 32);
}



/*************************************
 *
 *	Digital outputs
 *
 *************************************/

static WRITE16_HANDLER( digital_w )
{
	if (ACCESSING_LSB)
	{
		foodf_set_flip(data & 0x01);

		if (!(data & 0x04))
			atarigen_scanline_int_ack_w(0,0,0);
		if (!(data & 0x08))
			atarigen_video_int_ack_w(0,0,0);

		coin_counter_w(0, (data >> 6) & 1);
		coin_counter_w(1, (data >> 7) & 1);
	}
}



/*************************************
 *
 *	Analog inputs
 *
 *************************************/

static READ16_HANDLER( analog_r )
{
 
 /****************************************************
  * Live Center - rev 3 - by mahoneyt944 & grant2258 *
  ****************************************************/

  static INT16  currentx  = 0x80; // face left start of first round
  static INT16  currenty  = 0x7F;
  static INT16  delay     = 0;
  INT16 center = readinputport(6) & ~16; // check for joy center
  INT16 t = 0; // no debounce delay for analog


  // debounce delay for digital
  if (options.digital_analog) {t = 8; if (delay > t) delay = 0;}
  

  if (options.cheat_input_ports) // using cheat ports
  {
    if (delay == t) // debounce protection
    {
      delay = 0;

      if (whichport == 0) // x port called
      {
        if ( center == 0 ) {} // joy at center, no change
        else
        {
          INT16 temp = readinputport(whichport); // find new x stop direction
        
          if (temp > 128) // left
          {
            if (temp > 190) currentx = 190;
            else currentx = temp;
          }
        
          else if (temp < 128) // right
          {
            if (temp < 65) currentx = 65;
            else currentx = temp;
          }
          
          else currentx = 128; // x at center
        }
      }
      
      else if (whichport == 2) // y port called
      {
        if ( center == 0 ) {} // joy at center, no change
        else
        {
          INT16 temp = readinputport(whichport); // find new y stop direction
        
          if (temp > 128) // up
          {
            if (temp > 190) currenty = 190;
            else currenty = temp;
          }
        
          else if (temp < 128) // down
          {
            if (temp < 65) currenty = 65;
            else currenty = temp;
          }
          
          else currenty = 128; // y at center
        }
      }
      
      
    }
    else delay++;
    
    // return x position
    if (whichport == 0)
    {
      if (center == 0)
        return currentx;
      return readinputport(whichport);
    }

    // return y position
    else if (whichport == 2)
    {
      if (center == 0)
        return currenty;
      return readinputport(whichport);
    }
    
  }
  else // return original input
    return readinputport(whichport);
}


static WRITE16_HANDLER( analog_w )
{
	whichport = offset ^ 3;
}



/*************************************
 *
 *	POKEY I/O
 *
 *************************************/

static READ16_HANDLER( pokey1_word_r ) { return pokey1_r(offset); }
static READ16_HANDLER( pokey2_word_r ) { return pokey2_r(offset); }
static READ16_HANDLER( pokey3_word_r ) { return pokey3_r(offset); }

static WRITE16_HANDLER( pokey1_word_w ) { if (ACCESSING_LSB) pokey1_w(offset, data & 0xff); }
static WRITE16_HANDLER( pokey2_word_w ) { if (ACCESSING_LSB) pokey2_w(offset, data & 0xff); }
static WRITE16_HANDLER( pokey3_word_w ) { if (ACCESSING_LSB) pokey3_w(offset, data & 0xff); }



/*************************************
 *
 *	Main CPU memory handlers
 *
 *************************************/

static MEMORY_READ16_START( readmem )
	{ 0x000000, 0x00ffff, MRA16_ROM },
	{ 0x014000, 0x01cfff, MRA16_RAM },
	{ 0x800000, 0x8007ff, MRA16_RAM },
	{ 0x900000, 0x9001ff, nvram_r },
	{ 0x940000, 0x940007, analog_r },
	{ 0x948000, 0x948001, input_port_4_word_r },
	{ 0x94c000, 0x94c001, MRA16_NOP }, /* Used from PC 0x776E */
	{ 0x958000, 0x958001, watchdog_reset16_r },
	{ 0xa40000, 0xa4001f, pokey2_word_r },
	{ 0xa80000, 0xa8001f, pokey1_word_r },
	{ 0xac0000, 0xac001f, pokey3_word_r },
MEMORY_END


static MEMORY_WRITE16_START( writemem )
	{ 0x000000, 0x00ffff, MWA16_ROM },
	{ 0x014000, 0x01bfff, MWA16_RAM },
	{ 0x01c000, 0x01cfff, MWA16_RAM, &spriteram16, &spriteram_size },
	{ 0x800000, 0x8007ff, atarigen_playfield_w, &atarigen_playfield },
	{ 0x900000, 0x9001ff, MWA16_RAM, (data16_t **)&generic_nvram, &generic_nvram_size },
	{ 0x944000, 0x944007, analog_w },
	{ 0x948000, 0x948001, digital_w },
	{ 0x950000, 0x9501ff, foodf_paletteram_w, &paletteram16 },
	{ 0x954000, 0x954001, MWA16_NOP },
	{ 0x958000, 0x958001, watchdog_reset16_w },
	{ 0xa40000, 0xa4001f, pokey2_word_w },
	{ 0xa80000, 0xa8001f, pokey1_word_w },
	{ 0xac0000, 0xac001f, pokey3_word_w },
MEMORY_END



/*************************************
 *
 *	Port definitions
 *
 *************************************/

INPUT_PORTS_START( foodf )
	PORT_START	/* IN0 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_X | IPF_PLAYER1 | IPF_REVERSE, 100, 60, 0, 255 )

	PORT_START	/* IN1 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_X | IPF_PLAYER2 | IPF_REVERSE | IPF_COCKTAIL, 100, 60, 0, 255 )

	PORT_START	/* IN2 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_Y | IPF_PLAYER1 | IPF_REVERSE, 100, 60, 0, 255 )

	PORT_START	/* IN3 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_Y | IPF_PLAYER2 | IPF_REVERSE | IPF_COCKTAIL, 100, 60, 0, 255 )

	PORT_START	/* IN4 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN3 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_SERVICE( 0x80, IP_ACTIVE_LOW )

	PORT_START	/* SW1 */
	PORT_DIPNAME( 0x07, 0x00, "Bonus Coins" )
	PORT_DIPSETTING(    0x00, "None" )
	PORT_DIPSETTING(    0x05, "1 for every 2" )
	PORT_DIPSETTING(    0x02, "1 for every 4" )
	PORT_DIPSETTING(    0x01, "1 for every 5" )
	PORT_DIPSETTING(    0x06, "2 for every 4" )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Coin_A ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_2C ))
	PORT_DIPNAME( 0x30, 0x00, DEF_STR( Coin_B ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0x20, DEF_STR( 1C_4C ))
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_5C ))
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_6C ))
	PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ))
	PORT_DIPSETTING(    0x80, DEF_STR( 2C_1C ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_2C ))
	PORT_DIPSETTING(    0x40, DEF_STR( Free_Play ))

  PORT_START	/* fake port for digital joystick control */
	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP    | IPF_8WAY | IPF_CHEAT )
	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN  | IPF_8WAY | IPF_CHEAT )
	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT  | IPF_8WAY | IPF_CHEAT )
	PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_CHEAT )

INPUT_PORTS_END



/*************************************
 *
 *	Graphics definitions
 *
 *************************************/

static struct GfxLayout charlayout =
{
	8,8,
	RGN_FRAC(1,1),
	2,
	{ 0, 4 },
	{ 8*8+0, 8*8+1, 8*8+2, 8*8+3, 0, 1, 2, 3 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
	8*16
};


static struct GfxLayout spritelayout =
{
	16,16,
	RGN_FRAC(1,2),
	2,
	{ RGN_FRAC(1,2), 0 },
	{ 8*16+0, 8*16+1, 8*16+2, 8*16+3, 8*16+4, 8*16+5, 8*16+6, 8*16+7, 0, 1, 2, 3, 4, 5, 6, 7 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 },
	8*32
};


static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &charlayout,   0, 64 },	/* characters 8x8 */
	{ REGION_GFX2, 0, &spritelayout, 0, 64 },	/* sprites & playfield */
	{ -1 }
};



/*************************************
 *
 *	Sound definitions
 *
 *************************************/

static READ_HANDLER( pot_r )
{
	return (readinputport(5) >> offset) << 7;
}

static struct POKEYinterface pokey_interface =
{
	3,
	600000,
	{ 33, 33, 33 },
	/* The 8 pot handlers */
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	/* The allpot handler */
	{ 0, 0, 0 }
};



/*************************************
 *
 *	Machine driver
 *
 *************************************/

static MACHINE_DRIVER_START( foodf )

	/* basic machine hardware */
	MDRV_CPU_ADD(M68000, 6000000)
	MDRV_CPU_MEMORY(readmem,writemem)
	MDRV_CPU_VBLANK_INT(atarigen_video_int_gen,1)

	MDRV_FRAMES_PER_SECOND(60)
	MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)

	MDRV_MACHINE_INIT(foodf)
	MDRV_NVRAM_HANDLER(generic_1fill)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 0*8, 28*8-1)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(256)

	MDRV_VIDEO_START(foodf)
	MDRV_VIDEO_UPDATE(foodf)

	/* sound hardware */
	MDRV_SOUND_ADD(POKEY, pokey_interface)
MACHINE_DRIVER_END



/*************************************
 *
 *	ROM definition(s)
 *
 *************************************/

ROM_START( foodf )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for 68000 code */
	ROM_LOAD16_BYTE( "301-8c.020",   0x000001, 0x002000, CRC(dfc3d5a8) SHA1(7abe5e9c27098bd8c93cc06f1b9e3db0744019e9) )
	ROM_LOAD16_BYTE( "302-9c.020",   0x000000, 0x002000, CRC(ef92dc5c) SHA1(eb41291615165f549a68ebc6d4664edef1a04ac5) )
	ROM_LOAD16_BYTE( "303-8d.020",   0x004001, 0x002000, CRC(64b93076) SHA1(efa4090d96aa0ffd4192a045f174ac5960810bca) )
	ROM_LOAD16_BYTE( "304-9d.020",   0x004000, 0x002000, CRC(ea596480) SHA1(752aa33a8e8045650dd32ec7c7026e00d7896e0f) )
	ROM_LOAD16_BYTE( "305-8e.020",   0x008001, 0x002000, CRC(e6cff1b1) SHA1(7c7ad2dcdff60fc092e8a825c5a6de6b506523de) )
	ROM_LOAD16_BYTE( "306-9e.020",   0x008000, 0x002000, CRC(95159a3e) SHA1(f180126671776f62242ec9fd4a82a581c551ffce) )
	ROM_LOAD16_BYTE( "307-8f.020",   0x00c001, 0x002000, CRC(17828dbb) SHA1(9d8e29a5e56a8a9c5db8561e4c20ff22f69b46ca) )
	ROM_LOAD16_BYTE( "308-9f.020",   0x00c000, 0x002000, CRC(608690c9) SHA1(419020c69ce6fded0d9af44ead8ec4727468d58b) )

	ROM_REGION( 0x2000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "109-6lm.020",  0x000000, 0x002000, CRC(c13c90eb) SHA1(ebd2bbbdd7e184851d1ab4b5648481d966c78cc2) )

	ROM_REGION( 0x4000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "110-4d.020",   0x000000, 0x002000, CRC(8870e3d6) SHA1(702007d3d543f872b5bf5d00b49f6e05b46d6600) )
	ROM_LOAD( "111-4e.020",   0x002000, 0x002000, CRC(84372edf) SHA1(9beef3ff3b28405c45d691adfbc233921073be47) )
ROM_END


ROM_START( foodf2 )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for 68000 code */
	ROM_LOAD16_BYTE( "201-8c.020",   0x000001, 0x002000, CRC(4ee52d73) SHA1(ff4ab8169a9b260bbd1f49023a30064e2f0b6686) )
	ROM_LOAD16_BYTE( "202-9c.020",   0x000000, 0x002000, CRC(f8c4b977) SHA1(824d33baa413b2ee898c75157624ea007c92032f) )
	ROM_LOAD16_BYTE( "203-8d.020",   0x004001, 0x002000, CRC(0e9f99a3) SHA1(37bba66957ee19e7d05fcc3e4583e909809075ed) )
	ROM_LOAD16_BYTE( "204-9d.020",   0x004000, 0x002000, CRC(f667374c) SHA1(d7be70b56500e2071b7f8c810f7a3e2a6743c6bd) )
	ROM_LOAD16_BYTE( "205-8e.020",   0x008001, 0x002000, CRC(1edd05b5) SHA1(cc712a11946c103eaa808c86e15676fde8610ad9) )
	ROM_LOAD16_BYTE( "206-9e.020",   0x008000, 0x002000, CRC(bb8926b3) SHA1(95c6ba8ac6b56d1a67a47758b71712d55a959cd0) )
	ROM_LOAD16_BYTE( "207-8f.020",   0x00c001, 0x002000, CRC(c7383902) SHA1(f76e2c95fccd0cafff9346a32e0c041c291a6696) )
	ROM_LOAD16_BYTE( "208-9f.020",   0x00c000, 0x002000, CRC(608690c9) SHA1(419020c69ce6fded0d9af44ead8ec4727468d58b) )

	ROM_REGION( 0x2000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "109-6lm.020",  0x000000, 0x002000, CRC(c13c90eb) SHA1(ebd2bbbdd7e184851d1ab4b5648481d966c78cc2) )

	ROM_REGION( 0x4000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "110-4d.020",   0x000000, 0x002000, CRC(8870e3d6) SHA1(702007d3d543f872b5bf5d00b49f6e05b46d6600) )
	ROM_LOAD( "111-4e.020",   0x002000, 0x002000, CRC(84372edf) SHA1(9beef3ff3b28405c45d691adfbc233921073be47) )
ROM_END


ROM_START( foodfc )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for 68000 code */
	ROM_LOAD16_BYTE( "113-8c.020",   0x000001, 0x002000, CRC(193a299f) SHA1(58bbf714eff22d8a47b174e4b121f14a8dcb4ef9) )
	ROM_LOAD16_BYTE( "114-9c.020",   0x000000, 0x002000, CRC(33ed6bbe) SHA1(5d80fb092d2964b851e6c5982572d4ffc5078c55) )
	ROM_LOAD16_BYTE( "115-8d.020",   0x004001, 0x002000, CRC(64b93076) SHA1(efa4090d96aa0ffd4192a045f174ac5960810bca) )
	ROM_LOAD16_BYTE( "116-9d.020",   0x004000, 0x002000, CRC(ea596480) SHA1(752aa33a8e8045650dd32ec7c7026e00d7896e0f) )
	ROM_LOAD16_BYTE( "117-8e.020",   0x008001, 0x002000, CRC(12a55db6) SHA1(508f02c72074a0e3300ec32c181e4f72cbc4245f) )
	ROM_LOAD16_BYTE( "118-9e.020",   0x008000, 0x002000, CRC(e6d451d4) SHA1(03bfa932ed419572c08942ad159288b38d24d90f) )
	ROM_LOAD16_BYTE( "119-8f.020",   0x00c001, 0x002000, CRC(455cc891) SHA1(9f7764c15dea7568326860b910686fec644c42c2) )
	ROM_LOAD16_BYTE( "120-9f.020",   0x00c000, 0x002000, CRC(34173910) SHA1(19e6032c22d20410386516ffc1a809ae50431c65) )

	ROM_REGION( 0x2000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "109-6lm.020",  0x000000, 0x002000, CRC(c13c90eb) SHA1(ebd2bbbdd7e184851d1ab4b5648481d966c78cc2) )

	ROM_REGION( 0x4000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "110-4d.020",   0x000000, 0x002000, CRC(8870e3d6) SHA1(702007d3d543f872b5bf5d00b49f6e05b46d6600) )
	ROM_LOAD( "111-4e.020",   0x002000, 0x002000, CRC(84372edf) SHA1(9beef3ff3b28405c45d691adfbc233921073be47) )
ROM_END



/*************************************
 *
 *	Game driver(s)
 *
 *************************************/

GAMEC( 1982, foodf,  0,     foodf, foodf, 0, ROT0, "Atari", "Food Fight (rev 3)",    &foodf_ctrl, &foodf_bootstrap  )
GAMEC( 1982, foodf2, foodf, foodf, foodf, 0, ROT0, "Atari", "Food Fight (rev 2)",    &foodf_ctrl, &foodf_bootstrap  )
GAMEC( 1982, foodfc, foodf, foodf, foodf, 0, ROT0, "Atari", "Food Fight (cocktail)", &foodf_ctrl, &foodfc_bootstrap )

grant2258

honestly this was just for digital control hacks you would be better off adding a dipswitch option. with

controls hack -> digital hack
controls hack -> analog hack
controls hack -> off

mahoneyt944

@grant2258 yeah that would be a good idea. Under dip switch we'll have an option.

Live Center - On/Off
Use Debounce Delay - No/Yes

Live centering turns the hack on and off, default being on. Use Debounce Delay adds a delay or not, default being no.

mahoneyt944

@grant2258
So I don't know how to properly add/ use dip switch options. I added this:

PORT_DIPNAME( 0x01, 0x01, "Live Center" )
PORT_DIPSETTING(    0x01, "On" )
PORT_DIPSETTING(    0x00, "Off" )
	
PORT_DIPNAME( 0x01, 0x01, "Use Debounce Delay" )
PORT_DIPSETTING(    0x01, "No" )
PORT_DIPSETTING(    0x00, "Yes" )

Then I need to update my code to something like this but with the right argument:

if ("Live Center dip -> On") // live center dip switch set -> On
{
  // check debounce dip switch
  If ("Use Debounce Delay dip -> No") t = 0;) // debounce dip set -> No
    else { t = 8; if (delay > t) delay = 0; } // debounce dip set -> Yes

// rest of code

What argument do I need to get the dip values for each switch?

grant2258

really dont understand what your doing here at all you dont need debounce for analog ports. I thought you wanted this to work in barcade which is digital you removed that. You would be better removing the cheat port as its not needed since your reading the analog ports again. I really doesnt matter what way you do it if you want it to go upstream you need to enable the original functionality as well.

mahoneyt944

@grant2258 I want dip switches for both so I can decide to use the cheat or not then decide if I want delay or not.

That way I can change the settings on the fly.

If using analog controller
Live center on
Debounce off

If using digital controller
Live center on
Debounce on

If wanting to turn cheat off
Live center off
Debounce off

I just don't know how to get the dip switches value to use it in my code

grant2258

// debounce delay for digital
  if (options.digital_analog) {t = 8; if (delay > t) delay = 0;}
  

  if (options.cheat_input_ports) // using cheat ports
  {
    if (delay == t) // debounce protection
    {
      delay = 0;

      if (whichport == 0) // x port called
      {
        if ( center == 0 ) {} // joy at center, no change
        else
        {
          INT16 temp = readinputport(whichport); // find new x stop direction
        
          if (temp > 128) // left
          {
            if (temp > 190) currentx = 190;
            else currentx = temp;
          }
        
          else if (temp < 128) // right
          {
            if (temp < 65) currentx = 65;
            else currentx = temp;
          }
          
          else currentx = 128; // x at center
        }
      }
      
      else if (whichport == 2) // y port called
      {
        if ( center == 0 ) {} // joy at center, no change
        else
        {
          INT16 temp = readinputport(whichport); // find new y stop direction
        
          if (temp > 128) // up
          {
            if (temp > 190) currenty = 190;
            else currenty = temp;
          }
        
          else if (temp < 128) // down
          {
            if (temp < 65) currenty = 65;
            else currenty = temp;
          }
          
          else currenty = 128; // y at center
        }
      }
      
      
    }
    else delay++;
    
    // return x position
    if (whichport == 0)
    {
      if (center == 0)
        return currentx;
      return readinputport(whichport);
    }

    // return y position
    else if (whichport == 2)
    {
      if (center == 0)
        return currenty;
      return readinputport(whichport);
    }
    
  }
  else // return original input
    return readinputport(whichport);
}

you not using the digital cheatports at all your only reading readinputport(whichport); so there is no need for any setting or delays. enable cheat ports is enough

grant2258

INPUT_PORTS_START( foodf )
	PORT_START	/* IN0 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_X | IPF_PLAYER1 | IPF_REVERSE, 100, 60, 0, 255 )

	PORT_START	/* IN1 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_X | IPF_PLAYER2 | IPF_REVERSE | IPF_COCKTAIL, 100, 60, 0, 255 )

	PORT_START	/* IN2 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_Y | IPF_PLAYER1 | IPF_REVERSE, 100, 60, 0, 255 )

	PORT_START	/* IN3 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_Y | IPF_PLAYER2 | IPF_REVERSE | IPF_COCKTAIL, 100, 60, 0, 255 )

	PORT_START	/* IN4 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN3 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_SERVICE( 0x80, IP_ACTIVE_LOW )

	PORT_START	/* SW1 */
	PORT_DIPNAME( 0x07, 0x00, "Bonus Coins" )
	PORT_DIPSETTING(    0x00, "None" )
	PORT_DIPSETTING(    0x05, "1 for every 2" )
	PORT_DIPSETTING(    0x02, "1 for every 4" )
	PORT_DIPSETTING(    0x01, "1 for every 5" )
	PORT_DIPSETTING(    0x06, "2 for every 4" )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Coin_A ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_2C ))
	PORT_DIPNAME( 0x30, 0x00, DEF_STR( Coin_B ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0x20, DEF_STR( 1C_4C ))
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_5C ))
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_6C ))
	PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ))
	PORT_DIPSETTING(    0x80, DEF_STR( 2C_1C ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_2C ))
	PORT_DIPSETTING(    0x40, DEF_STR( Free_Play ))
INPUT_PORTS_END

ports stat at zero every time you see a port PORT_START thats a new port use readinputport(port number) to read that port value as you can see your code is only reading analog ports whichport is only ever set to zero and 2 or 1 and 3 in cocktail mode for player 2

mahoneyt944

@grant2258 ok two questions,

If I want to check the value of a dip switch using an if statement how would I do that? It it's on or off?

And I've been using:

INT16 center = readinputport(6) & ~16;

To identify my center how do I do that with analog? Just read each port separately or is there an easier check?

Like this:

INT16 center = (readinputport(0) & ~16) + (readinputport(2) & ~16);

grant2258

you need to compare 0 and 2 with 7f

if( readinputport(0) == 0x7f && readinputport(2)== 0x7f) center =1;
else center =0;

there is no use masking it with wrong bits both axis need checked that why all these checks where done on the original code digital code. Im not quite sure what your trying to achieve here now im sure it will become clear though. Obviously this wont work mainline without an auto center fix for digital to analog controls or other older ports of mame. It will also cause issues if your left right up and down where mapped to dpad and your analog mappings where on the stick. It would make sense to use the same input ports your actually reading

mahoneyt944

@grant2258 thank you,

Ok so I'm adding dip switch options to this instead of using cheat input ports. I added new dip switches to the port list like this not sure if that right or not:

PORT_DIPNAME( 0x01, 0x01, "Live Center" )
PORT_DIPSETTING(    0x01, "On" )
PORT_DIPSETTING(    0x00, "Off" )
	
PORT_DIPNAME( 0x01, 0x01, "Use Debounce Delay" )
PORT_DIPSETTING(    0x01, "No" )
PORT_DIPSETTING(    0x00, "Yes" )

I want to check for that dip switch in my code, how do I do that?

If (dipswitch on) do something

How do I specifically check a certain dip switch?

grant2258

the same way use readinputport(portnumberfordipswitch) and check the number returned

mahoneyt944

@grant2258

If I type readinputport(5), how do I know it's reading the switch for centering and not for bonus coins or something else?

grant2258

by checking the returned value youll need to mask the particular bit you want to check

mahoneyt944

@grant2258 how do I mask it? You mean give it its own port?

grant2258

what are you asking if you dont know how to mask just make another port each port returns the vaules its set by it. You compare these values when you read the port.

you dont really need to use any options just check the enable cheap input ports option if its enabled or not thats already there. Since youve choose to read analog ports instead of digital there is no need any other options.

mahoneyt944

@grant2258
Here this is rev 4, it's geared towards correcting analog controls with precision but supports digital correction as well. I added dip settings to have more flexibility in what "feels right" to the player and the controller type they are using. I find that my junk ps2 style controller that has analog and digital varies compared to other analog controllers I have tried. I'll elaborate after I explain the dip settings:

Live Center - On / Off
Debounce Delay - 0, 2, 4, 6, 8, 10

Live center activates the correction, turning it off ignores the entire fix including the delay set. Debounce delay sets how many skips there are between reads. Setting the delay to "2" for example, will skip two reads on each axis before a read(stopping direction) is set . Like so:

Delay set at 2
X -----S-R-S-S-R-S-S-R-S-S-R-S-S-R
Y -----S-S-R-S-S-R-S-S-R-S-S-R-S-S

So why did I add these dip settings? Well, mostly for digital correction first and foremost. However, I found that because the stopping position is read in very rapidly the entire time your joy is off of center, this sometimes means that as you are pulling your stick back to center from where you want to be pointing, the stopping position is set while almost at center and sets it off a bit from where you expected to be. This issue can be corrected by adding a slight bit of delay or increasing the analog deadzone in the retroarch options menu to maintain more precision. I also found that my cabinet which uses an 8 way restrictor on a digital control doesn't need any delay because the restrictor doesn't allow you to linger long enough in any direction to be an issue. However, my junk PS2 style controller does because of its one piece arrow buttons design. So the delay really effects each controller differently.

In order to use this correction on a digital controller you must use grant2258 digital centering correction fix explained in an earlier post above along with this corrected driver. This correction truly makes this game a blast to play and is the closest emulated experience I've seen.

The only thing left to see is if there is any more wiggle room to add more stop positions near the outer ring of the joystick. Right now they are capped to 190 and 65 which is close. It's probably unnecessary but I like to be accurate.

foodf.c
Outdated

/***************************************************************************

	Atari Food Fight hardware

	driver by Aaron Giles

	Games supported:
		* Food Fight

	Known bugs:
		* none at this time

****************************************************************************

	Memory map

****************************************************************************

	========================================================================
	MAIN CPU
	========================================================================
	000000-00FFFF   R     xxxxxxxx xxxxxxxx   Program ROM
	014000-01BFFF   R/W   xxxxxxxx xxxxxxxx   Program RAM
	01C000-01CFFF   R/W   xxxxxxxx xxxxxxxx   Motion object RAM (1024 entries x 2 words)
	                R/W   x------- --------      (0: Horizontal flip)
	                R/W   -x------ --------      (0: Vertical flip)
	                R/W   ---xxxxx --------      (0: Palette select)
	                R/W   -------- xxxxxxxx      (0: Tile index)
	                R/W   xxxxxxxx --------      (1: X position)
	                R/W   -------- xxxxxxxx      (1: Y position)
	800000-8007FF   R/W   xxxxxxxx xxxxxxxx   Playfield RAM (32x32 tiles)
	                R/W   x------- --------      (Tile index MSB)
	                R/W   --xxxxxx --------      (Palette select)
	                R/W   -------- xxxxxxxx      (Tile index LSBs)
	900000-9001FF   R/W   -------- ----xxxx   NVRAM
	940000-940007   R     -------- xxxxxxxx   Analog input read
	944000-944007     W   -------- --------   Analog input select
	948000          R     -------- xxxxxxxx   Digital inputs
	                R     -------- x-------      (Self test)
	                R     -------- -x------      (Player 2 throw)
	                R     -------- --x-----      (Player 1 throw)
	                R     -------- ---x----      (Aux coin)
	                R     -------- ----x---      (2 player start)
	                R     -------- -----x--      (1 player start)
	                R     -------- ------x-      (Right coin)
	                R     -------- -------x      (Left coin)
	948000            W   -------- xxxxxxxx   Digital outputs
	                  W   -------- x-------      (Right coin counter)
	                  W   -------- -x------      (Left coin counter)
	                  W   -------- --x-----      (LED 2)
	                  W   -------- ---x----      (LED 1)
	                  W   -------- ----x---      (INT2 reset)
	                  W   -------- -----x--      (INT1 reset)
	                  W   -------- ------x-      (Update)
	                  W   -------- -------x      (Playfield flip)
	94C000            W   -------- --------   Unknown
	950000-9501FF     W   -------- xxxxxxxx   Palette RAM (256 entries)
	                  W   -------- xx------      (Blue)
	                  W   -------- --xxx---      (Green)
	                  W   -------- -----xxx      (Red)
	954000            W   -------- --------   NVRAM recall
	958000            W   -------- --------   Watchdog
	A40000-A4001F   R/W   -------- xxxxxxxx   POKEY 2
	A80000-A8001F   R/W   -------- xxxxxxxx   POKEY 1
	AC0000-AC001F   R/W   -------- xxxxxxxx   POKEY 3
	========================================================================
	Interrupts:
		IRQ1 = 32V
		IRQ2 = VBLANK
	========================================================================


***************************************************************************/


#include "driver.h"
#include "machine/atarigen.h"
#include "vidhrdw/generic.h"
#include "foodf.h"
#include "bootstrap.h"



/*************************************
 *
 *	Statics
 *
 *************************************/

static UINT8 whichport = 0;



/*************************************
 *
 *	NVRAM
 *
 *************************************/

static READ16_HANDLER( nvram_r )
{
	return ((data16_t *)generic_nvram)[offset] | 0xfff0;
}



/*************************************
 *
 *	Interrupts
 *
 *************************************/

static void update_interrupts(void)
{
	int newstate = 0;

	if (atarigen_scanline_int_state)
		newstate |= 1;
	if (atarigen_video_int_state)
		newstate |= 2;

	if (newstate)
		cpu_set_irq_line(0, newstate, ASSERT_LINE);
	else
		cpu_set_irq_line(0, 7, CLEAR_LINE);
}


static void scanline_update(int scanline)
{
	/* INT 1 is on 32V */
	if (scanline & 32)
		atarigen_scanline_int_gen();
}


static MACHINE_INIT( foodf )
{
	atarigen_interrupt_reset(update_interrupts);
	atarigen_scanline_timer_reset(scanline_update, 32);
}



/*************************************
 *
 *	Digital outputs
 *
 *************************************/

static WRITE16_HANDLER( digital_w )
{
	if (ACCESSING_LSB)
	{
		foodf_set_flip(data & 0x01);

		if (!(data & 0x04))
			atarigen_scanline_int_ack_w(0,0,0);
		if (!(data & 0x08))
			atarigen_video_int_ack_w(0,0,0);

		coin_counter_w(0, (data >> 6) & 1);
		coin_counter_w(1, (data >> 7) & 1);
	}
}



/*************************************
 *
 *	Analog inputs
 *
 *************************************/

static READ16_HANDLER( analog_r )
{
 
 /****************************************************
  * Live Center - rev 4 - by mahoneyt944 & grant2258 *
  ****************************************************/

  static INT16 currentx  = 0x80; // face left start of first round
  static INT16 currenty  = 0x7F;
  static INT16 delay     = 0;    // debounce counter
  static INT16 t         = 0;    // debounce count to reach
  INT16  center          = 0;    // reset center check


  // live center dip switch set -> On
  if (readinputport(6) == 0x10)
  {
    // user set debounce delay from dip setting
    if (readinputport(7) == 0xFF) t = 0;
    else if (readinputport(7) == 0x02) t = 2;
    else if (readinputport(7) == 0x04) t = 4;
    else if (readinputport(7) == 0x06) t = 6;
    else if (readinputport(7) == 0x08) t = 8;
    else if (readinputport(7) == 0x0A) t = 10;
    if (delay > t) delay = 0;

    // check for center
    if (readinputport(0) == 0x7F && readinputport(2) == 0x7F) center = 1;

    if (delay == t) // debounce protection
    {
      delay = 0;

      if (whichport == 0) // x port called
      {
        if (center) {} // joy at center, no change
        else
        {
          INT16 temp = readinputport(whichport); // find new x stop direction
        
          if (temp > 128) // left
          {
            if (temp > 190) currentx = 190;
            else currentx = temp;
          }
        
          else if (temp < 128) // right
          {
            if (temp < 65) currentx = 65;
            else currentx = temp;
          }
          
          else currentx = 128; // x at center
        }
      }
      
      else if (whichport == 2) // y port called
      {
        if (center) {} // joy at center, no change
        else
        {
          INT16 temp = readinputport(whichport); // find new y stop direction
        
          if (temp > 128) // up
          {
            if (temp > 190) currenty = 190;
            else currenty = temp;
          }
        
          else if (temp < 128) // down
          {
            if (temp < 65) currenty = 65;
            else currenty = temp;
          }
          
          else currenty = 128; // y at center
        }
      }
    }
    else delay++;
    
    // return x position
    if (whichport == 0)
    {
      if (center)
        return currentx;
      return readinputport(whichport);
    }

    // return y position
    else if (whichport == 2)
    {
      if (center)
        return currenty;
      return readinputport(whichport);
    }
    
  }
  
  else // return original input 
    return readinputport(whichport);
}


static WRITE16_HANDLER( analog_w )
{
	whichport = offset ^ 3;
}



/*************************************
 *
 *	POKEY I/O
 *
 *************************************/

static READ16_HANDLER( pokey1_word_r ) { return pokey1_r(offset); }
static READ16_HANDLER( pokey2_word_r ) { return pokey2_r(offset); }
static READ16_HANDLER( pokey3_word_r ) { return pokey3_r(offset); }

static WRITE16_HANDLER( pokey1_word_w ) { if (ACCESSING_LSB) pokey1_w(offset, data & 0xff); }
static WRITE16_HANDLER( pokey2_word_w ) { if (ACCESSING_LSB) pokey2_w(offset, data & 0xff); }
static WRITE16_HANDLER( pokey3_word_w ) { if (ACCESSING_LSB) pokey3_w(offset, data & 0xff); }



/*************************************
 *
 *	Main CPU memory handlers
 *
 *************************************/

static MEMORY_READ16_START( readmem )
	{ 0x000000, 0x00ffff, MRA16_ROM },
	{ 0x014000, 0x01cfff, MRA16_RAM },
	{ 0x800000, 0x8007ff, MRA16_RAM },
	{ 0x900000, 0x9001ff, nvram_r },
	{ 0x940000, 0x940007, analog_r },
	{ 0x948000, 0x948001, input_port_4_word_r },
	{ 0x94c000, 0x94c001, MRA16_NOP }, /* Used from PC 0x776E */
	{ 0x958000, 0x958001, watchdog_reset16_r },
	{ 0xa40000, 0xa4001f, pokey2_word_r },
	{ 0xa80000, 0xa8001f, pokey1_word_r },
	{ 0xac0000, 0xac001f, pokey3_word_r },
MEMORY_END


static MEMORY_WRITE16_START( writemem )
	{ 0x000000, 0x00ffff, MWA16_ROM },
	{ 0x014000, 0x01bfff, MWA16_RAM },
	{ 0x01c000, 0x01cfff, MWA16_RAM, &spriteram16, &spriteram_size },
	{ 0x800000, 0x8007ff, atarigen_playfield_w, &atarigen_playfield },
	{ 0x900000, 0x9001ff, MWA16_RAM, (data16_t **)&generic_nvram, &generic_nvram_size },
	{ 0x944000, 0x944007, analog_w },
	{ 0x948000, 0x948001, digital_w },
	{ 0x950000, 0x9501ff, foodf_paletteram_w, &paletteram16 },
	{ 0x954000, 0x954001, MWA16_NOP },
	{ 0x958000, 0x958001, watchdog_reset16_w },
	{ 0xa40000, 0xa4001f, pokey2_word_w },
	{ 0xa80000, 0xa8001f, pokey1_word_w },
	{ 0xac0000, 0xac001f, pokey3_word_w },
MEMORY_END



/*************************************
 *
 *	Port definitions
 *
 *************************************/

INPUT_PORTS_START( foodf )
	PORT_START	/* IN0 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_X | IPF_PLAYER1 | IPF_REVERSE, 100, 60, 0, 255 )

	PORT_START	/* IN1 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_X | IPF_PLAYER2 | IPF_REVERSE | IPF_COCKTAIL, 100, 60, 0, 255 )

	PORT_START	/* IN2 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_Y | IPF_PLAYER1 | IPF_REVERSE, 100, 60, 0, 255 )

	PORT_START	/* IN3 */
	PORT_ANALOG( 0xff, 0x7f, IPT_AD_STICK_Y | IPF_PLAYER2 | IPF_REVERSE | IPF_COCKTAIL, 100, 60, 0, 255 )

	PORT_START	/* IN4 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN3 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_SERVICE( 0x80, IP_ACTIVE_LOW )

	PORT_START	/* SW1 */
	PORT_DIPNAME( 0x07, 0x00, "Bonus Coins" )
	PORT_DIPSETTING(    0x00, "None" )
	PORT_DIPSETTING(    0x05, "1 for every 2" )
	PORT_DIPSETTING(    0x02, "1 for every 4" )
	PORT_DIPSETTING(    0x01, "1 for every 5" )
	PORT_DIPSETTING(    0x06, "2 for every 4" )
	PORT_DIPNAME( 0x08, 0x00, DEF_STR( Coin_A ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_2C ))
	PORT_DIPNAME( 0x30, 0x00, DEF_STR( Coin_B ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0x20, DEF_STR( 1C_4C ))
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_5C ))
	PORT_DIPSETTING(    0x30, DEF_STR( 1C_6C ))
	PORT_DIPNAME( 0xc0, 0x00, DEF_STR( Coinage ))
	PORT_DIPSETTING(    0x80, DEF_STR( 2C_1C ))
	PORT_DIPSETTING(    0x00, DEF_STR( 1C_1C ))
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_2C ))
	PORT_DIPSETTING(    0x40, DEF_STR( Free_Play ))
	
	PORT_START	/* Port #6 - Toggle for Live Center */
	PORT_DIPNAME( 0x10, 0x10, "Live Center" )
	PORT_DIPSETTING(    0x10, "On" )
	PORT_DIPSETTING(    0x00, "Off" )
	
	PORT_START	/* Port #7 - Settings for Debounce Delay */
	PORT_DIPNAME( 0xFF, 0xFF, "Debounce Delay" )
	PORT_DIPSETTING(    0xFF, "0" )
	PORT_DIPSETTING(    0x02, "2" )
	PORT_DIPSETTING(    0x04, "4" )
	PORT_DIPSETTING(    0x06, "6" )
	PORT_DIPSETTING(    0x08, "8" )
	PORT_DIPSETTING(    0x0A, "10")

INPUT_PORTS_END



/*************************************
 *
 *	Graphics definitions
 *
 *************************************/

static struct GfxLayout charlayout =
{
	8,8,
	RGN_FRAC(1,1),
	2,
	{ 0, 4 },
	{ 8*8+0, 8*8+1, 8*8+2, 8*8+3, 0, 1, 2, 3 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
	8*16
};


static struct GfxLayout spritelayout =
{
	16,16,
	RGN_FRAC(1,2),
	2,
	{ RGN_FRAC(1,2), 0 },
	{ 8*16+0, 8*16+1, 8*16+2, 8*16+3, 8*16+4, 8*16+5, 8*16+6, 8*16+7, 0, 1, 2, 3, 4, 5, 6, 7 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 },
	8*32
};


static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ REGION_GFX1, 0, &charlayout,   0, 64 },	/* characters 8x8 */
	{ REGION_GFX2, 0, &spritelayout, 0, 64 },	/* sprites & playfield */
	{ -1 }
};



/*************************************
 *
 *	Sound definitions
 *
 *************************************/

static READ_HANDLER( pot_r )
{
	return (readinputport(5) >> offset) << 7;
}

static struct POKEYinterface pokey_interface =
{
	3,
	600000,
	{ 33, 33, 33 },
	/* The 8 pot handlers */
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	{ pot_r, 0, 0 },
	/* The allpot handler */
	{ 0, 0, 0 }
};



/*************************************
 *
 *	Machine driver
 *
 *************************************/

static MACHINE_DRIVER_START( foodf )

	/* basic machine hardware */
	MDRV_CPU_ADD(M68000, 6000000)
	MDRV_CPU_MEMORY(readmem,writemem)
	MDRV_CPU_VBLANK_INT(atarigen_video_int_gen,1)

	MDRV_FRAMES_PER_SECOND(60)
	MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)

	MDRV_MACHINE_INIT(foodf)
	MDRV_NVRAM_HANDLER(generic_1fill)

	/* video hardware */
	MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
	MDRV_SCREEN_SIZE(32*8, 32*8)
	MDRV_VISIBLE_AREA(0*8, 32*8-1, 0*8, 28*8-1)
	MDRV_GFXDECODE(gfxdecodeinfo)
	MDRV_PALETTE_LENGTH(256)

	MDRV_VIDEO_START(foodf)
	MDRV_VIDEO_UPDATE(foodf)

	/* sound hardware */
	MDRV_SOUND_ADD(POKEY, pokey_interface)
MACHINE_DRIVER_END



/*************************************
 *
 *	ROM definition(s)
 *
 *************************************/

ROM_START( foodf )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for 68000 code */
	ROM_LOAD16_BYTE( "301-8c.020",   0x000001, 0x002000, CRC(dfc3d5a8) SHA1(7abe5e9c27098bd8c93cc06f1b9e3db0744019e9) )
	ROM_LOAD16_BYTE( "302-9c.020",   0x000000, 0x002000, CRC(ef92dc5c) SHA1(eb41291615165f549a68ebc6d4664edef1a04ac5) )
	ROM_LOAD16_BYTE( "303-8d.020",   0x004001, 0x002000, CRC(64b93076) SHA1(efa4090d96aa0ffd4192a045f174ac5960810bca) )
	ROM_LOAD16_BYTE( "304-9d.020",   0x004000, 0x002000, CRC(ea596480) SHA1(752aa33a8e8045650dd32ec7c7026e00d7896e0f) )
	ROM_LOAD16_BYTE( "305-8e.020",   0x008001, 0x002000, CRC(e6cff1b1) SHA1(7c7ad2dcdff60fc092e8a825c5a6de6b506523de) )
	ROM_LOAD16_BYTE( "306-9e.020",   0x008000, 0x002000, CRC(95159a3e) SHA1(f180126671776f62242ec9fd4a82a581c551ffce) )
	ROM_LOAD16_BYTE( "307-8f.020",   0x00c001, 0x002000, CRC(17828dbb) SHA1(9d8e29a5e56a8a9c5db8561e4c20ff22f69b46ca) )
	ROM_LOAD16_BYTE( "308-9f.020",   0x00c000, 0x002000, CRC(608690c9) SHA1(419020c69ce6fded0d9af44ead8ec4727468d58b) )

	ROM_REGION( 0x2000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "109-6lm.020",  0x000000, 0x002000, CRC(c13c90eb) SHA1(ebd2bbbdd7e184851d1ab4b5648481d966c78cc2) )

	ROM_REGION( 0x4000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "110-4d.020",   0x000000, 0x002000, CRC(8870e3d6) SHA1(702007d3d543f872b5bf5d00b49f6e05b46d6600) )
	ROM_LOAD( "111-4e.020",   0x002000, 0x002000, CRC(84372edf) SHA1(9beef3ff3b28405c45d691adfbc233921073be47) )
ROM_END


ROM_START( foodf2 )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for 68000 code */
	ROM_LOAD16_BYTE( "201-8c.020",   0x000001, 0x002000, CRC(4ee52d73) SHA1(ff4ab8169a9b260bbd1f49023a30064e2f0b6686) )
	ROM_LOAD16_BYTE( "202-9c.020",   0x000000, 0x002000, CRC(f8c4b977) SHA1(824d33baa413b2ee898c75157624ea007c92032f) )
	ROM_LOAD16_BYTE( "203-8d.020",   0x004001, 0x002000, CRC(0e9f99a3) SHA1(37bba66957ee19e7d05fcc3e4583e909809075ed) )
	ROM_LOAD16_BYTE( "204-9d.020",   0x004000, 0x002000, CRC(f667374c) SHA1(d7be70b56500e2071b7f8c810f7a3e2a6743c6bd) )
	ROM_LOAD16_BYTE( "205-8e.020",   0x008001, 0x002000, CRC(1edd05b5) SHA1(cc712a11946c103eaa808c86e15676fde8610ad9) )
	ROM_LOAD16_BYTE( "206-9e.020",   0x008000, 0x002000, CRC(bb8926b3) SHA1(95c6ba8ac6b56d1a67a47758b71712d55a959cd0) )
	ROM_LOAD16_BYTE( "207-8f.020",   0x00c001, 0x002000, CRC(c7383902) SHA1(f76e2c95fccd0cafff9346a32e0c041c291a6696) )
	ROM_LOAD16_BYTE( "208-9f.020",   0x00c000, 0x002000, CRC(608690c9) SHA1(419020c69ce6fded0d9af44ead8ec4727468d58b) )

	ROM_REGION( 0x2000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "109-6lm.020",  0x000000, 0x002000, CRC(c13c90eb) SHA1(ebd2bbbdd7e184851d1ab4b5648481d966c78cc2) )

	ROM_REGION( 0x4000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "110-4d.020",   0x000000, 0x002000, CRC(8870e3d6) SHA1(702007d3d543f872b5bf5d00b49f6e05b46d6600) )
	ROM_LOAD( "111-4e.020",   0x002000, 0x002000, CRC(84372edf) SHA1(9beef3ff3b28405c45d691adfbc233921073be47) )
ROM_END


ROM_START( foodfc )
	ROM_REGION( 0x10000, REGION_CPU1, 0 )	/* 64k for 68000 code */
	ROM_LOAD16_BYTE( "113-8c.020",   0x000001, 0x002000, CRC(193a299f) SHA1(58bbf714eff22d8a47b174e4b121f14a8dcb4ef9) )
	ROM_LOAD16_BYTE( "114-9c.020",   0x000000, 0x002000, CRC(33ed6bbe) SHA1(5d80fb092d2964b851e6c5982572d4ffc5078c55) )
	ROM_LOAD16_BYTE( "115-8d.020",   0x004001, 0x002000, CRC(64b93076) SHA1(efa4090d96aa0ffd4192a045f174ac5960810bca) )
	ROM_LOAD16_BYTE( "116-9d.020",   0x004000, 0x002000, CRC(ea596480) SHA1(752aa33a8e8045650dd32ec7c7026e00d7896e0f) )
	ROM_LOAD16_BYTE( "117-8e.020",   0x008001, 0x002000, CRC(12a55db6) SHA1(508f02c72074a0e3300ec32c181e4f72cbc4245f) )
	ROM_LOAD16_BYTE( "118-9e.020",   0x008000, 0x002000, CRC(e6d451d4) SHA1(03bfa932ed419572c08942ad159288b38d24d90f) )
	ROM_LOAD16_BYTE( "119-8f.020",   0x00c001, 0x002000, CRC(455cc891) SHA1(9f7764c15dea7568326860b910686fec644c42c2) )
	ROM_LOAD16_BYTE( "120-9f.020",   0x00c000, 0x002000, CRC(34173910) SHA1(19e6032c22d20410386516ffc1a809ae50431c65) )

	ROM_REGION( 0x2000, REGION_GFX1, ROMREGION_DISPOSE )
	ROM_LOAD( "109-6lm.020",  0x000000, 0x002000, CRC(c13c90eb) SHA1(ebd2bbbdd7e184851d1ab4b5648481d966c78cc2) )

	ROM_REGION( 0x4000, REGION_GFX2, ROMREGION_DISPOSE )
	ROM_LOAD( "110-4d.020",   0x000000, 0x002000, CRC(8870e3d6) SHA1(702007d3d543f872b5bf5d00b49f6e05b46d6600) )
	ROM_LOAD( "111-4e.020",   0x002000, 0x002000, CRC(84372edf) SHA1(9beef3ff3b28405c45d691adfbc233921073be47) )
ROM_END



/*************************************
 *
 *	Game driver(s)
 *
 *************************************/

GAMEC( 1982, foodf,  0,     foodf, foodf, 0, ROT0, "Atari", "Food Fight (rev 3)",    &foodf_ctrl, &foodf_bootstrap  )
GAMEC( 1982, foodf2, foodf, foodf, foodf, 0, ROT0, "Atari", "Food Fight (rev 2)",    &foodf_ctrl, &foodf_bootstrap  )
GAMEC( 1982, foodfc, foodf, foodf, foodf, 0, ROT0, "Atari", "Food Fight (cocktail)", &foodf_ctrl, &foodfc_bootstrap )

mahoneyt944

Live Center Rev 5 for Food Fight Release

synchronized input reads
finer delay control
cocktail support added
dip switch option live center ( on/off ) -- off is default, turn on to use hack.
dip switch optional debounce delay setting ( 0 - 10 ) -- 0 is default, no delay, adjust as needed.
can be used with digital controls if "Center axis for digital controls" is enabled in core options.
simplified code

What is Live Center and why is food fight wrong even in current versions of mame?
Well first off, mame is emulating accurately. Food fight used a highly precise analog joystick that had a larger range in it's throw from center. This allowed you to partially press the joystick to change your aiming direction, without actually moving on screen.

The issue in emulating this game is a result of the controllers we most commonly use. Modern analog joysticks (such as a PS3 style controller) are stubby and have a short throw from center. The original joystick was tall giving you more range to work with. Food fight took advantage of this and set an inner and outer range of movement controls. The issue here is that modern joysticks almost skip over the inner range of control due to their short throw. This prevents you from easily aiming while standing still. Typically this means you must remain moving to aim properly. I call this the "facing right" issue.

Live center emulates the gameplay of the original stick by tracking the position you last pressed so that when you return the joystick to center, you will face in that direction to throw things. This emulates the inner range of control you'd normally have on a highly precise analog arcade style joystick without it. This allows the game play to be more natural for all analog joysticks. A bonus of this feature is that even a digital 8 way joystick can now be used to play the game if setup properly (read post #119).

#785 - foodf.c patch
#786 - digital centering correction patch
#815 - digital centering bug patch