distrib/sdl-1.2.15/src/joystick/mint/SDL_sysjoystick.c - platform/external/qemu - Git at Google

 /*
     SDL - Simple DirectMedia Layer
     Copyright (C) 1997-2012 Sam Lantinga

     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.

     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.

     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

     Sam Lantinga
     slouken@libsdl.org
 */
 #include "SDL_config.h"

 #ifdef SDL_JOYSTICK_MINT

 /*
  *	Atari Joystick/Joypad drivers
  *
  *	Patrice Mandin
  */

 #include <mint/cookie.h>
 #include <mint/osbind.h>

 #include "SDL_events.h"
 #include "../SDL_sysjoystick.h"
 #include "../SDL_joystick_c.h"

 #include "../../video/ataricommon/SDL_ikbdinterrupt_s.h"
 #include "../../video/ataricommon/SDL_xbiosevents_c.h"
 #include "../../video/ataricommon/SDL_xbiosinterrupt_s.h"

 /*--- Const ---*/

 /* We can have:
 	1 joystick on IKBD port 1, read via hardware I/O
 	  or same joystick on IKBD port 1, read via xbios
 	1 joypad on port A (up to 4 with teamtap)
 	  or 2 joysticks on joypad port A
 	  or 1 analog paddle on joypad port A
 	  or 1 lightpen on joypad port A
 	1 joypad on port B (up to 4 with teamtap)
 	  or 2 joysticks on joypad port B
 	  or 1 analog paddle on joypad port B
 	2 joysticks on parallel port
 */

 enum {
 	IKBD_JOY1=0,
 	XBIOS_JOY1,
 	PORTA_PAD0,
 	PORTA_PAD1,
 	PORTA_PAD2,
 	PORTA_PAD3,
 	PORTB_PAD0,
 	PORTB_PAD1,
 	PORTB_PAD2,
 	PORTB_PAD3,
 	PORTA_JOY0,
 	PORTA_JOY1,
 	PORTB_JOY0,
 	PORTB_JOY1,
 	PORTA_LP,
 	PORTA_ANPAD,
 	PORTB_ANPAD,
 #if 0
 	PARA_JOY0,
 	PARA_JOY1,
 #endif
 	MAX_JOYSTICKS
 };

 enum {
 	MCH_ST=0,
 	MCH_STE,
 	MCH_TT,
 	MCH_F30,
 	MCH_CLONE,
 	MCH_ARANYM
 };

 /*	Joypad buttons
  *		Procontroller note:
  *			L,R are connected to 4,6
  *			X,Y,Z are connected to 7,8,9
  */

 enum {
 	JP_UP=0,	JP_DOWN,	JP_LEFT,	JP_RIGHT,
 	JP_KPMULT,	JP_KP7,		JP_KP4,		JP_KP1,
 	JP_KP0,		JP_KP8,		JP_KP5,		JP_KP2,
 	JP_KPNUM,	JP_KP9,		JP_KP6,		JP_KP3,
 	JP_PAUSE,	JP_FIRE0,	JP_UNDEF0,	JP_FIRE1,
 	JP_UNDEF1,	JP_FIRE2,	JP_UNDEF2,	JP_OPTION
 };

 #define JP_NUM_BUTTONS 17

 #define PORT_JS_RIGHT	(1<<0)
 #define PORT_JS_LEFT	(1<<1)
 #define PORT_JS_DOWN	(1<<2)
 #define PORT_JS_UP		(1<<3)
 #define PORT_JS_FIRE	(1<<4)

 enum {
 	TEAMTAP_MAYBE=0,
 	TEAMTAP_YES,
 	TEAMTAP_NO
 };

 /* Teamtap detection values */
 static const Uint32 teamtap_ghosts[20][4]={
 	{1<<JP_UP,	/* for this event on joypad 0, port X */
 		(1<<JP_UP)|(1<<JP_KP0),	/* we get this on joypad 1 */
 		(1<<JP_UP)|(1<<JP_KPNUM)|(1<<JP_KP0),	/* this on joypad 2 */
 		(1<<JP_KPMULT)|(1<<JP_KP0)},	/* this on joypad 3 */
 	{1<<JP_DOWN,
 		(1<<JP_DOWN)|(1<<JP_KP8),
 		(1<<JP_DOWN)|(1<<JP_KP9)|(1<<JP_KP8),
 		(1<<JP_KP7)|(1<<JP_KP8)},
 	{1<<JP_LEFT,
 		(1<<JP_LEFT)|(1<<JP_KP5),
 		(1<<JP_LEFT)|(1<<JP_KP6)|(1<<JP_KP5),
 		(1<<JP_KP4)|(1<<JP_KP5)},
 	{1<<JP_RIGHT,
 		(1<<JP_RIGHT)|(1<<JP_KP2),
 		(1<<JP_RIGHT)|(1<<JP_KP3)|(1<<JP_KP2),
 		(1<<JP_KP1)|(1<<JP_KP2)},
 	{1<<JP_OPTION,
 		(1<<JP_OPTION)|(1<<JP_FIRE1)|(1<<JP_FIRE2),
 		(1<<JP_FIRE0)|(1<<JP_FIRE1)|(1<<JP_FIRE2),
 		0},
 	{1<<JP_FIRE0,
 		(1<<JP_FIRE2)|(1<<JP_FIRE0),
 		(1<<JP_FIRE0)|(1<<JP_OPTION)|(1<<JP_FIRE2),
 		(1<<JP_FIRE1)|(1<<JP_FIRE2)},
 	{1<<JP_FIRE1,
 		(1<<JP_FIRE0),
 		(1<<JP_OPTION)|(1<<JP_FIRE0)|(1<<JP_FIRE1),
 		(1<<JP_FIRE0)|(1<<JP_FIRE2)},
 	{1<<JP_FIRE2,
 		(1<<JP_OPTION)|(1<<JP_FIRE0)|(1<<JP_FIRE1)|(1<<JP_FIRE2),
 		(1<<JP_OPTION),
 		(1<<JP_FIRE0)|(1<<JP_FIRE1)},
 	{1<<JP_KP1,
 		(1<<JP_RIGHT)|(1<<JP_KP1),
 		(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP3),
 		(1<<JP_RIGHT)|(1<<JP_KP2)},
 	{1<<JP_KP2,
 		(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP2)|(1<<JP_KP3),
 		(1<<JP_KP3),
 		(1<<JP_RIGHT)|(1<<JP_KP1)},
 	{1<<JP_KP3,
 		(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP2)|(1<<JP_KP3),
 		(1<<JP_RIGHT)|(1<<JP_KP1)|(1<<JP_KP2),
 		0},
 	{1<<JP_KP4,
 		(1<<JP_LEFT)|(1<<JP_KP4),
 		(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP6),
 		(1<<JP_LEFT)|(1<<JP_KP5)},
 	{1<<JP_KP5,
 		(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP5)|(1<<JP_KP6),
 		(1<<JP_KP6),
 		(1<<JP_LEFT)|(1<<JP_KP4)},
 	{1<<JP_KP6,
 		(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP5)|(1<<JP_KP6),
 		(1<<JP_LEFT)|(1<<JP_KP4)|(1<<JP_KP5),
 		0},
 	{1<<JP_KP7,
 		(1<<JP_DOWN)|(1<<JP_KP7),
 		(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP9),
 		(1<<JP_DOWN)|(1<<JP_KP8)},
 	{1<<JP_KP8,
 		(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP8)|(1<<JP_KP9),
 		(1<<JP_KP9),
 		(1<<JP_DOWN)|(1<<JP_KP7)},
 	{1<<JP_KP9,
 		(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP8)|(1<<JP_KP9),
 		(1<<JP_DOWN)|(1<<JP_KP7)|(1<<JP_KP8),
 		0},
 	{1<<JP_KPMULT,
 		(1<<JP_UP)|(1<<JP_KPMULT),
 		(1<<JP_UP)|(1<<JP_KPNUM),
 		(1<<JP_UP)|(1<<JP_KP0)},
 	{1<<JP_KP0,
 		(1<<JP_UP)|(1<<JP_KPNUM)|(1<<JP_KPMULT)|(1<<JP_KP0),
 		1<<JP_KPNUM,
 		(1<<JP_UP)|(1<<JP_KPMULT)},
 	{1<<JP_KPNUM,
 		(1<<JP_UP)|(1<<JP_KPNUM)|(1<<JP_KPMULT)|(1<<JP_KP0),
 		(1<<JP_UP)|(1<<JP_KPMULT)|(1<<JP_KP0),
 		0},
 };

 /*--- Types ---*/

 typedef struct {
 	SDL_bool enabled;
 	char *name;
 	Uint32 prevstate;
 } atarijoy_t;

 /*--- Variables ---*/

 static atarijoy_t atarijoysticks[MAX_JOYSTICKS]={
 	{SDL_FALSE,"IKBD joystick port 1",0},
 	{SDL_FALSE,"Xbios joystick port 1",0},
 	{SDL_FALSE,"Joypad 0 port A",0},
 	{SDL_FALSE,"Joypad 1 port A",0},
 	{SDL_FALSE,"Joypad 2 port A",0},
 	{SDL_FALSE,"Joypad 3 port A",0},
 	{SDL_FALSE,"Joypad 0 port B",0},
 	{SDL_FALSE,"Joypad 1 port B",0},
 	{SDL_FALSE,"Joypad 2 port B",0},
 	{SDL_FALSE,"Joypad 3 port B",0},
 	{SDL_FALSE,"Joystick 0 port A",0},
 	{SDL_FALSE,"Joystick 1 port A",0},
 	{SDL_FALSE,"Joystick 0 port B",0},
 	{SDL_FALSE,"Joystick 1 port B",0},
 	{SDL_FALSE,"Lightpen port A",0},
 	{SDL_FALSE,"Analog paddle port A",0},
 	{SDL_FALSE,"Analog paddle port B",0}
 #if 0
 	,{SDL_FALSE,"Joystick 0 parallel port",0},
 	{SDL_FALSE,"Joystick 1 parallel port",0}
 #endif
 };

 static const int jp_buttons[JP_NUM_BUTTONS]={
 	JP_FIRE0,	JP_FIRE1,	JP_FIRE2,	JP_PAUSE,
 	JP_OPTION,	JP_KPMULT,	JP_KPNUM,	JP_KP0,
 	JP_KP1,		JP_KP2,		JP_KP3,		JP_KP4,
 	JP_KP5,		JP_KP6,		JP_KP7,		JP_KP8,
 	JP_KP9
 };

 static SDL_bool joypad_ports_enabled=SDL_FALSE;
 static int has_teamtap[2]={TEAMTAP_MAYBE,TEAMTAP_MAYBE};

 /* Updated joypad ports */
 static Uint16 jp_paddles[4];
 static Uint16 jp_lightpens[2];
 static Uint16 jp_directions;
 static Uint16 jp_fires;
 static Uint32 jp_joypads[8];

 /*--- Functions prototypes ---*/

 static int GetEnabledAtariJoystick(int index);
 static void UpdateJoypads(void);

 /*--- Functions ---*/

 int SDL_SYS_JoystickInit(void)
 {
 	int i;
 	long cookie_mch;
 	const char *envr=SDL_getenv("SDL_JOYSTICK_ATARI");

 #define TEST_JOY_ENABLED(env,idstring,num) \
 	if (SDL_strstr(env,idstring"-off")) { \
 		atarijoysticks[num].enabled=SDL_FALSE; \
 	} \
 	if (SDL_strstr(env,idstring"-on")) { \
 		atarijoysticks[num].enabled=SDL_TRUE; \
 	}

 	/* Cookie _MCH present ? if not, assume ST machine */
 	if (Getcookie(C__MCH, &cookie_mch) != C_FOUND) {
 		cookie_mch = MCH_ST << 16;
 	}

 	/* Enable some default joysticks */
 	if ((cookie_mch == MCH_ST<<16) || ((cookie_mch>>16) == MCH_STE) ||
 	    (cookie_mch == MCH_TT<<16) || (cookie_mch == MCH_F30<<16) ||
 	    (cookie_mch == MCH_ARANYM<<16))
 	{
 		atarijoysticks[IKBD_JOY1].enabled=(SDL_AtariIkbd_enabled!=0);
 	}
 	if ((cookie_mch == MCH_STE<<16) || (cookie_mch == MCH_F30<<16) ||
 	    (cookie_mch == MCH_ARANYM<<16))
 	{
 		atarijoysticks[PORTA_PAD0].enabled =
 			atarijoysticks[PORTA_PAD1].enabled =
 			atarijoysticks[PORTA_PAD2].enabled =
 			atarijoysticks[PORTA_PAD3].enabled =
 			atarijoysticks[PORTB_PAD0].enabled =
 			atarijoysticks[PORTB_PAD1].enabled =
 			atarijoysticks[PORTB_PAD2].enabled =
 			atarijoysticks[PORTB_PAD3].enabled = SDL_TRUE;
 	}
 	if (!atarijoysticks[IKBD_JOY1].enabled) {
 		atarijoysticks[XBIOS_JOY1].enabled=(SDL_AtariXbios_enabled!=0);
 	}

 	/* Read environment for joysticks to enable */
 	if (envr) {
 		/* IKBD on any Atari, maybe clones */
 		if ((cookie_mch == MCH_ST<<16) || ((cookie_mch>>16) == MCH_STE) ||
 			(cookie_mch == MCH_TT<<16) || (cookie_mch == MCH_F30<<16) ||
 			(cookie_mch == MCH_ARANYM<<16)) {
 			if (SDL_AtariIkbd_enabled!=0) {
 				TEST_JOY_ENABLED(envr, "ikbd-joy1", IKBD_JOY1);
 			}
 		}
 		/* Joypads ports on STE, Falcon and maybe others */
 		if ((cookie_mch == MCH_STE<<16) || (cookie_mch == MCH_F30<<16) ||
 			(cookie_mch == MCH_ARANYM<<16)) {
 			TEST_JOY_ENABLED(envr, "porta-pad", PORTA_PAD0);
 			if (!atarijoysticks[PORTA_PAD0].enabled) {
 				TEST_JOY_ENABLED(envr, "porta-joy0", PORTA_JOY0);
 				TEST_JOY_ENABLED(envr, "porta-joy1", PORTA_JOY1);
 				if (!(atarijoysticks[PORTA_JOY0].enabled) && !(atarijoysticks[PORTA_JOY1].enabled)) {
 					TEST_JOY_ENABLED(envr, "porta-lp", PORTA_LP);
 					if (!atarijoysticks[PORTA_LP].enabled) {
 						TEST_JOY_ENABLED(envr, "porta-anpad", PORTA_ANPAD);
 					}
 				}
 			}

 			TEST_JOY_ENABLED(envr, "portb-pad", PORTB_PAD0);
 			if (!atarijoysticks[PORTB_PAD0].enabled) {
 				TEST_JOY_ENABLED(envr, "portb-joy0", PORTB_JOY0);
 				TEST_JOY_ENABLED(envr, "portb-joy1", PORTB_JOY1);
 				if (!(atarijoysticks[PORTB_JOY0].enabled) && !(atarijoysticks[PORTB_JOY1].enabled)) {
 					TEST_JOY_ENABLED(envr, "portb-anpad", PORTB_ANPAD);
 				}
 			}
 		}

 		if (!atarijoysticks[IKBD_JOY1].enabled) {
 			if (SDL_AtariXbios_enabled!=0) {
 				TEST_JOY_ENABLED(envr, "xbios-joy1", XBIOS_JOY1);
 			}
 		}
 #if 0
 		/* Parallel port on any Atari, maybe clones */
 		if ((cookie_mch == MCH_ST<<16) || ((cookie_mch>>16) == MCH_STE) ||
 			(cookie_mch == MCH_TT<<16) || (cookie_mch == MCH_F30<<16)) {
 			TEST_JOY_ENABLED(envr, "para-joy0", PARA_JOY0);
 			TEST_JOY_ENABLED(envr, "para-joy1", PARA_JOY1);
 		}
 #endif
 	}

 	/* Need to update joypad ports ? */
 	joypad_ports_enabled=SDL_FALSE;
 	for (i=PORTA_PAD0;i<=PORTB_ANPAD;i++) {
 		if (atarijoysticks[i].enabled) {
 			joypad_ports_enabled=SDL_TRUE;
 			break;
 		}
 	}

 	SDL_numjoysticks = 0;
 	for (i=0;i<MAX_JOYSTICKS;i++) {
 		if (atarijoysticks[i].enabled) {
 			++SDL_numjoysticks;
 		}
 	}

 	return(SDL_numjoysticks);
 }

 static int GetEnabledAtariJoystick(int index)
 {
 	int i,j;

 	/* Return the nth'index' enabled atari joystick */
 	j=0;
 	for (i=0;i<MAX_JOYSTICKS;i++) {
 		if (!atarijoysticks[i].enabled) {
 			continue;
 		}

 		if (j==index) {
 			break;
 		}

 		++j;
 	}
 	if (i==MAX_JOYSTICKS)
 		return -1;

 	return i;
 }

 const char *SDL_SYS_JoystickName(int index)
 {
 	int numjoystick;

 	numjoystick=GetEnabledAtariJoystick(index);
 	if (numjoystick==-1)
 		return NULL;

 	return(atarijoysticks[numjoystick].name);
 }

 int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
 {
 	int numjoystick;

 	numjoystick=GetEnabledAtariJoystick(joystick->index);
 	if (numjoystick==-1)
 		return -1;

 	joystick->naxes=0;
 	joystick->nhats=0;
 	joystick->nballs=0;

 	switch(numjoystick) {
 		case PORTA_PAD0:
 		case PORTA_PAD1:
 		case PORTA_PAD2:
 		case PORTA_PAD3:
 		case PORTB_PAD0:
 		case PORTB_PAD1:
 		case PORTB_PAD2:
 		case PORTB_PAD3:
 			joystick->nhats=1;
 			joystick->nbuttons=JP_NUM_BUTTONS;
 			break;
 		case PORTA_LP:
 		case PORTA_ANPAD:
 		case PORTB_ANPAD:
 			joystick->naxes=2;
 			joystick->nbuttons=2;
 			break;
 		default:
 			joystick->nhats=1;
 			joystick->nbuttons=1;
 			break;
 	}

 	return(0);
 }

 /* Detect Teamtap using ghost events */
 static void detect_teamtap(int num_port)
 {
 	int i,j;

 	/* Check if joypad 1,2,3 triggered but not 0 */
 	for (i=1; i<4; i++) {
 		if (jp_joypads[num_port*4+i] && (jp_joypads[num_port*4]==0)) {
 			has_teamtap[num_port] = TEAMTAP_YES;
 			return;
 		}
 	}

 	/* Check if joypad 0 on a given port triggered ghost events for
 	 * other joypads
 	 */
 	for (i=0; i<20; i++) {
 		int with_teamtap=1;

 		if (jp_joypads[num_port*4]!=teamtap_ghosts[i][0])
 			continue;

 		/* If any button on first joypad pressed, check other pads */
 		for (j=1; j<4; j++) {
 			if ((jp_joypads[num_port*4+j] & teamtap_ghosts[i][j])
 			    ==teamtap_ghosts[i][j])
 			{
 				with_teamtap = 0;
 			}
 		}

 		has_teamtap[num_port] = (with_teamtap ? TEAMTAP_YES : TEAMTAP_NO);
 		break;
 	}
 }

 void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
 {
 	int numjoystick;
 	Uint8 hatstate;
 	Uint32 curstate,prevstate;

 	numjoystick=GetEnabledAtariJoystick(joystick->index);
 	if (numjoystick==-1)
 		return;

 	prevstate = atarijoysticks[numjoystick].prevstate;

 	if (joypad_ports_enabled) {
 		Supexec(UpdateJoypads);
 	}

 	switch (numjoystick) {
 		case IKBD_JOY1:
 		case XBIOS_JOY1:
 			{
 				curstate = 0;

 				if (numjoystick==IKBD_JOY1) {
 					curstate = SDL_AtariIkbd_joystick & 0xff;
 				}
 				if (numjoystick==XBIOS_JOY1) {
 					curstate = SDL_AtariXbios_joystick & 0xff;
 				}

 				if (curstate != prevstate) {
 					hatstate = SDL_HAT_CENTERED;
 					if (curstate & IKBD_JOY_LEFT) {
 						hatstate |= SDL_HAT_LEFT;
 					}
 					if (curstate & IKBD_JOY_RIGHT) {
 						hatstate |= SDL_HAT_RIGHT;
 					}
 					if (curstate & IKBD_JOY_UP) {
 						hatstate |= SDL_HAT_UP;
 					}
 					if (curstate & IKBD_JOY_DOWN) {
 						hatstate |= SDL_HAT_DOWN;
 					}
 					SDL_PrivateJoystickHat(joystick, 0, hatstate);

 					/* Button */
 					if ((curstate & IKBD_JOY_FIRE) && !(prevstate & IKBD_JOY_FIRE)) {
 						SDL_PrivateJoystickButton(joystick,0,SDL_PRESSED);
 					}
 					if (!(curstate & IKBD_JOY_FIRE) && (prevstate & IKBD_JOY_FIRE)) {
 						SDL_PrivateJoystickButton(joystick,0,SDL_RELEASED);
 					}
 				}
 				atarijoysticks[numjoystick].prevstate = curstate;
 			}
 			break;
 		case PORTA_PAD0:
 		case PORTA_PAD1:
 		case PORTA_PAD2:
 		case PORTA_PAD3:
 		case PORTB_PAD0:
 		case PORTB_PAD1:
 		case PORTB_PAD2:
 		case PORTB_PAD3:
 			{
 				int numjoypad,i,numport;

 				numjoypad = numport = 0;
 				switch(numjoystick) {
 					case PORTA_PAD0:
 						numjoypad = 0;	break;
 					case PORTA_PAD1:
 						numjoypad = 1;	break;
 					case PORTA_PAD2:
 						numjoypad = 2;	break;
 					case PORTA_PAD3:
 						numjoypad = 3;	break;
 					case PORTB_PAD0:
 						numjoypad = 4;	numport = 1; break;
 					case PORTB_PAD1:
 						numjoypad = 5;	numport = 1; break;
 					case PORTB_PAD2:
 						numjoypad = 6;	numport = 1; break;
 					case PORTB_PAD3:
 						numjoypad = 7;	numport = 1; break;
 				}

 				jp_joypads[numjoypad] &= 0xabffff;

 				if (has_teamtap[numport]==TEAMTAP_MAYBE) {
 					detect_teamtap(numport);
 				}
 				/* No events for PORTX_PAD[1,2,3] if no teamtap detected */
 				if (has_teamtap[numport] == TEAMTAP_NO) {
 					if ((numjoypad & 3)!=0) {
 						return;
 					}
 				}

 				curstate=jp_joypads[numjoypad];
 				if (curstate!=prevstate) {
 					hatstate = SDL_HAT_CENTERED;
 					if (curstate & (1<<JP_LEFT)) {
 						hatstate |= SDL_HAT_LEFT;
 					}
 					if (curstate & (1<<JP_RIGHT)) {
 						hatstate |= SDL_HAT_RIGHT;
 					}
 					if (curstate & (1<<JP_UP)) {
 						hatstate |= SDL_HAT_UP;
 					}
 					if (curstate & (1<<JP_DOWN)) {
 						hatstate |= SDL_HAT_DOWN;
 					}
 					SDL_PrivateJoystickHat(joystick, 0, hatstate);

 					/* Buttons */
 					for (i=0;i<JP_NUM_BUTTONS;i++) {
 						int button;

 						button=1<<jp_buttons[i];

 						if ((curstate & button) && !(prevstate & button)) {
 							SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
 						}
 						if (!(curstate & button) && (prevstate & button)) {
 							SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
 						}
 					}
 				}
 				atarijoysticks[numjoystick].prevstate = curstate;
 			}
 			break;
 		case PORTA_JOY0:
 		case PORTA_JOY1:
 		case PORTB_JOY0:
 		case PORTB_JOY1:
 			{
 				int fire_shift=0,dir_shift=0;

 				if (numjoystick==PORTA_JOY0) {	fire_shift=0; dir_shift=0; }
 				if (numjoystick==PORTA_JOY1) {	fire_shift=1; dir_shift=4; }
 				if (numjoystick==PORTB_JOY0) {	fire_shift=2; dir_shift=8; }
 				if (numjoystick==PORTB_JOY1) {	fire_shift=3; dir_shift=12; }

 				curstate = (jp_directions>>dir_shift) & 15;
 				curstate |= ((jp_fires>>fire_shift) & 1)<<4;

 				if (curstate != prevstate) {
 					hatstate = SDL_HAT_CENTERED;
 					if (curstate & PORT_JS_LEFT) {
 						hatstate |= SDL_HAT_LEFT;
 					}
 					if (curstate & PORT_JS_RIGHT) {
 						hatstate |= SDL_HAT_RIGHT;
 					}
 					if (curstate & PORT_JS_UP) {
 						hatstate |= SDL_HAT_UP;
 					}
 					if (curstate & PORT_JS_DOWN) {
 						hatstate |= SDL_HAT_DOWN;
 					}
 					SDL_PrivateJoystickHat(joystick, 0, hatstate);

 					/* Button */
 					if ((curstate & PORT_JS_FIRE) && !(prevstate & PORT_JS_FIRE)) {
 						SDL_PrivateJoystickButton(joystick,0,SDL_PRESSED);
 					}
 					if (!(curstate & PORT_JS_FIRE) && (prevstate & PORT_JS_FIRE)) {
 						SDL_PrivateJoystickButton(joystick,0,SDL_RELEASED);
 					}
 				}
 				atarijoysticks[numjoystick].prevstate = curstate;
 			}
 			break;
 		case PORTA_LP:
 			{
 				int i;

 				curstate = jp_lightpens[0]>>1;
 				curstate |= (jp_lightpens[1]>>1)<<15;
 				curstate |= (jp_fires & 3)<<30;

 				if (curstate != prevstate) {
 					/* X axis */
 					SDL_PrivateJoystickAxis(joystick,0,jp_lightpens[0] ^ 0x8000);
 					/* Y axis */
 					SDL_PrivateJoystickAxis(joystick,1,jp_lightpens[1] ^ 0x8000);
 					/* Buttons */
 					for (i=0;i<2;i++) {
 						int button;

 						button=1<<(30+i);

 						if ((curstate & button) && !(prevstate & button)) {
 							SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
 						}
 						if (!(curstate & button) && (prevstate & button)) {
 							SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
 						}
 					}
 				}
 				atarijoysticks[numjoystick].prevstate = curstate;
 			}
 			break;
 		case PORTA_ANPAD:
 		case PORTB_ANPAD:
 			{
 				int numpaddle, i;

 				numpaddle=0<<1;
 				if (numjoystick==PORTB_ANPAD) numpaddle=1<<1;

 				curstate = jp_paddles[numpaddle]>>1;
 				curstate |= (jp_paddles[numpaddle+1]>>1)<<15;
 				curstate |= ((jp_fires>>numpaddle) & 3)<<30;

 				if (curstate != prevstate) {
 					/* X axis */
 					SDL_PrivateJoystickAxis(joystick,0,jp_paddles[numpaddle] ^ 0x8000);
 					/* Y axis */
 					SDL_PrivateJoystickAxis(joystick,1,jp_paddles[numpaddle+1] ^ 0x8000);
 					/* Buttons */
 					for (i=0;i<2;i++) {
 						int button;

 						button=1<<(30+i);

 						if ((curstate & button) && !(prevstate & button)) {
 							SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
 						}
 						if (!(curstate & button) && (prevstate & button)) {
 							SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
 						}
 					}
 				}
 				atarijoysticks[numjoystick].prevstate = curstate;
 			}
 			break;
 #if 0
 		case PARA_JOY0:
 		case PARA_JOY1:
 			break;
 #endif
 	};

 	return;
 }

 void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
 {
 	return;
 }

 void SDL_SYS_JoystickQuit(void)
 {
 	SDL_numjoysticks=0;
 	return;
 }

 /*--- Joypad I/O read/write interface ---*/

 #define JOYPAD_IO_BASE (0xffff9200)
 struct JOYPAD_IO_S {
 	Uint16 fires;
 	Uint16 directions;
 	Uint16 dummy1[6];
 	Uint16 paddles[4];
 	Uint16 dummy2[4];
 	Uint16 lightpens[2];
 };
 #define JOYPAD_IO ((*(volatile struct JOYPAD_IO_S *)JOYPAD_IO_BASE))

 static const Uint16 joypad_masks[8*4]={
 	0xfffe, 0xfffd, 0xfffb, 0xfff7,
 	0xfff0, 0xfff1, 0xfff2, 0xfff3,
 	0xfff4, 0xfff5, 0xfff6, 0xfff8,
 	0xfff9, 0xfffa, 0xfffc, 0xffff,
 	0xffef, 0xffdf, 0xffbf, 0xff7f,
 	0xff0f, 0xff1f, 0xff2f, 0xff3f,
 	0xff4f, 0xff5f, 0xff6f, 0xff8f,
 	0xff9f, 0xffaf, 0xffcf, 0xffff
 };

 static void UpdateJoypads(void)
 {
 	Uint16 tmp, i, j;
 	Uint32 cur_fire, cur_dir;

 	/*--- This function is called in supervisor mode ---*/

 	/* Update joysticks */
 	jp_fires = (~(JOYPAD_IO.fires)) & 15;
 	jp_directions = (~(JOYPAD_IO.directions));

 	/* Update lightpen */
 	tmp = JOYPAD_IO.lightpens[0] & 1023;
 	jp_lightpens[0] = (tmp<<6) | (tmp>>4);
 	tmp = JOYPAD_IO.lightpens[1] & 1023;
 	jp_lightpens[1] = (tmp<<6) | (tmp>>4);

 	/* Update paddles */
 	tmp = (JOYPAD_IO.paddles[0] & 255);
 	jp_paddles[0] = (tmp<<8) | tmp;
 	tmp = (JOYPAD_IO.paddles[1] & 255);
 	jp_paddles[1] = (tmp<<8) | tmp;
 	tmp = (JOYPAD_IO.paddles[2] & 255);
 	jp_paddles[2] = (tmp<<8) | tmp;
 	tmp = (JOYPAD_IO.paddles[3] & 255);
 	jp_paddles[3] = (tmp<<8) | tmp;

 	/* Update joypads on teamtap port A */
 	for (i=0; i<4; i++) {
 		jp_joypads[i] = 0;
 		for (j=0; j<4; j++) {
 			JOYPAD_IO.directions = joypad_masks[(i*4)+j];

 			cur_fire = (~(JOYPAD_IO.fires) & 3)<<16;
 			cur_dir = (~(JOYPAD_IO.directions)>>8) & 15;

 			jp_joypads[i] |= cur_fire<<(j*2);
 			jp_joypads[i] |= cur_dir<<(j*4);
 		}
 	}

 	/* Update joypads on teamtap port B */
 	for (i=4; i<8; i++) {
 		jp_joypads[i] = 0;
 		for (j=0; j<4; j++) {
 			JOYPAD_IO.directions = joypad_masks[(i*4)+j];

 			cur_fire = (~(JOYPAD_IO.fires) & 0xc)<<14;
 			cur_dir = (~(JOYPAD_IO.directions)>>12) & 15;

 			jp_joypads[i] |= cur_fire<<(j*2);
 			jp_joypads[i] |= cur_dir<<(j*4);
 		}
 	}

 	JOYPAD_IO.directions=0xffff;
 }

 #endif /* SDL_JOYSTICK_MINT */
	/*
	SDL - Simple DirectMedia Layer
	Copyright (C) 1997-2012 Sam Lantinga

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this library; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

	Sam Lantinga
	slouken@libsdl.org
	*/
	#include "SDL_config.h"

	#ifdef SDL_JOYSTICK_MINT

	/*
	* Atari Joystick/Joypad drivers
	*
	* Patrice Mandin
	*/

	#include <mint/cookie.h>
	#include <mint/osbind.h>

	#include "SDL_events.h"
	#include "../SDL_sysjoystick.h"
	#include "../SDL_joystick_c.h"

	#include "../../video/ataricommon/SDL_ikbdinterrupt_s.h"
	#include "../../video/ataricommon/SDL_xbiosevents_c.h"
	#include "../../video/ataricommon/SDL_xbiosinterrupt_s.h"

	/--- Const ---/

	/* We can have:
	1 joystick on IKBD port 1, read via hardware I/O
	or same joystick on IKBD port 1, read via xbios
	1 joypad on port A (up to 4 with teamtap)
	or 2 joysticks on joypad port A
	or 1 analog paddle on joypad port A
	or 1 lightpen on joypad port A
	1 joypad on port B (up to 4 with teamtap)
	or 2 joysticks on joypad port B
	or 1 analog paddle on joypad port B
	2 joysticks on parallel port
	*/

	enum {
	IKBD_JOY1=0,
	XBIOS_JOY1,
	PORTA_PAD0,
	PORTA_PAD1,
	PORTA_PAD2,
	PORTA_PAD3,
	PORTB_PAD0,
	PORTB_PAD1,
	PORTB_PAD2,
	PORTB_PAD3,
	PORTA_JOY0,
	PORTA_JOY1,
	PORTB_JOY0,
	PORTB_JOY1,
	PORTA_LP,
	PORTA_ANPAD,
	PORTB_ANPAD,
	#if 0
	PARA_JOY0,
	PARA_JOY1,
	#endif
	MAX_JOYSTICKS
	};

	enum {
	MCH_ST=0,
	MCH_STE,
	MCH_TT,
	MCH_F30,
	MCH_CLONE,
	MCH_ARANYM
	};

	/* Joypad buttons
	* Procontroller note:
	* L,R are connected to 4,6
	* X,Y,Z are connected to 7,8,9
	*/

	enum {
	JP_UP=0, JP_DOWN, JP_LEFT, JP_RIGHT,
	JP_KPMULT, JP_KP7, JP_KP4, JP_KP1,
	JP_KP0, JP_KP8, JP_KP5, JP_KP2,
	JP_KPNUM, JP_KP9, JP_KP6, JP_KP3,
	JP_PAUSE, JP_FIRE0, JP_UNDEF0, JP_FIRE1,
	JP_UNDEF1, JP_FIRE2, JP_UNDEF2, JP_OPTION
	};

	#define JP_NUM_BUTTONS 17

	#define PORT_JS_RIGHT (1<<0)
	#define PORT_JS_LEFT (1<<1)
	#define PORT_JS_DOWN (1<<2)
	#define PORT_JS_UP (1<<3)
	#define PORT_JS_FIRE (1<<4)

	enum {
	TEAMTAP_MAYBE=0,
	TEAMTAP_YES,
	TEAMTAP_NO
	};

	/* Teamtap detection values */
	static const Uint32 teamtap_ghosts[20][4]={
	{1<<JP_UP, /* for this event on joypad 0, port X */
	(1<<JP_UP)\|(1<<JP_KP0), /* we get this on joypad 1 */
	(1<<JP_UP)\|(1<<JP_KPNUM)\|(1<<JP_KP0), /* this on joypad 2 */
	(1<<JP_KPMULT)\|(1<<JP_KP0)}, /* this on joypad 3 */
	{1<<JP_DOWN,
	(1<<JP_DOWN)\|(1<<JP_KP8),
	(1<<JP_DOWN)\|(1<<JP_KP9)\|(1<<JP_KP8),
	(1<<JP_KP7)\|(1<<JP_KP8)},
	{1<<JP_LEFT,
	(1<<JP_LEFT)\|(1<<JP_KP5),
	(1<<JP_LEFT)\|(1<<JP_KP6)\|(1<<JP_KP5),
	(1<<JP_KP4)\|(1<<JP_KP5)},
	{1<<JP_RIGHT,
	(1<<JP_RIGHT)\|(1<<JP_KP2),
	(1<<JP_RIGHT)\|(1<<JP_KP3)\|(1<<JP_KP2),
	(1<<JP_KP1)\|(1<<JP_KP2)},
	{1<<JP_OPTION,
	(1<<JP_OPTION)\|(1<<JP_FIRE1)\|(1<<JP_FIRE2),
	(1<<JP_FIRE0)\|(1<<JP_FIRE1)\|(1<<JP_FIRE2),
	0},
	{1<<JP_FIRE0,
	(1<<JP_FIRE2)\|(1<<JP_FIRE0),
	(1<<JP_FIRE0)\|(1<<JP_OPTION)\|(1<<JP_FIRE2),
	(1<<JP_FIRE1)\|(1<<JP_FIRE2)},
	{1<<JP_FIRE1,
	(1<<JP_FIRE0),
	(1<<JP_OPTION)\|(1<<JP_FIRE0)\|(1<<JP_FIRE1),
	(1<<JP_FIRE0)\|(1<<JP_FIRE2)},
	{1<<JP_FIRE2,
	(1<<JP_OPTION)\|(1<<JP_FIRE0)\|(1<<JP_FIRE1)\|(1<<JP_FIRE2),
	(1<<JP_OPTION),
	(1<<JP_FIRE0)\|(1<<JP_FIRE1)},
	{1<<JP_KP1,
	(1<<JP_RIGHT)\|(1<<JP_KP1),
	(1<<JP_RIGHT)\|(1<<JP_KP1)\|(1<<JP_KP3),
	(1<<JP_RIGHT)\|(1<<JP_KP2)},
	{1<<JP_KP2,
	(1<<JP_RIGHT)\|(1<<JP_KP1)\|(1<<JP_KP2)\|(1<<JP_KP3),
	(1<<JP_KP3),
	(1<<JP_RIGHT)\|(1<<JP_KP1)},
	{1<<JP_KP3,
	(1<<JP_RIGHT)\|(1<<JP_KP1)\|(1<<JP_KP2)\|(1<<JP_KP3),
	(1<<JP_RIGHT)\|(1<<JP_KP1)\|(1<<JP_KP2),
	0},
	{1<<JP_KP4,
	(1<<JP_LEFT)\|(1<<JP_KP4),
	(1<<JP_LEFT)\|(1<<JP_KP4)\|(1<<JP_KP6),
	(1<<JP_LEFT)\|(1<<JP_KP5)},
	{1<<JP_KP5,
	(1<<JP_LEFT)\|(1<<JP_KP4)\|(1<<JP_KP5)\|(1<<JP_KP6),
	(1<<JP_KP6),
	(1<<JP_LEFT)\|(1<<JP_KP4)},
	{1<<JP_KP6,
	(1<<JP_LEFT)\|(1<<JP_KP4)\|(1<<JP_KP5)\|(1<<JP_KP6),
	(1<<JP_LEFT)\|(1<<JP_KP4)\|(1<<JP_KP5),
	0},
	{1<<JP_KP7,
	(1<<JP_DOWN)\|(1<<JP_KP7),
	(1<<JP_DOWN)\|(1<<JP_KP7)\|(1<<JP_KP9),
	(1<<JP_DOWN)\|(1<<JP_KP8)},
	{1<<JP_KP8,
	(1<<JP_DOWN)\|(1<<JP_KP7)\|(1<<JP_KP8)\|(1<<JP_KP9),
	(1<<JP_KP9),
	(1<<JP_DOWN)\|(1<<JP_KP7)},
	{1<<JP_KP9,
	(1<<JP_DOWN)\|(1<<JP_KP7)\|(1<<JP_KP8)\|(1<<JP_KP9),
	(1<<JP_DOWN)\|(1<<JP_KP7)\|(1<<JP_KP8),
	0},
	{1<<JP_KPMULT,
	(1<<JP_UP)\|(1<<JP_KPMULT),
	(1<<JP_UP)\|(1<<JP_KPNUM),
	(1<<JP_UP)\|(1<<JP_KP0)},
	{1<<JP_KP0,
	(1<<JP_UP)\|(1<<JP_KPNUM)\|(1<<JP_KPMULT)\|(1<<JP_KP0),
	1<<JP_KPNUM,
	(1<<JP_UP)\|(1<<JP_KPMULT)},
	{1<<JP_KPNUM,
	(1<<JP_UP)\|(1<<JP_KPNUM)\|(1<<JP_KPMULT)\|(1<<JP_KP0),
	(1<<JP_UP)\|(1<<JP_KPMULT)\|(1<<JP_KP0),
	0},
	};

	/--- Types ---/

	typedef struct {
	SDL_bool enabled;
	char *name;
	Uint32 prevstate;
	} atarijoy_t;

	/--- Variables ---/

	static atarijoy_t atarijoysticks[MAX_JOYSTICKS]={
	{SDL_FALSE,"IKBD joystick port 1",0},
	{SDL_FALSE,"Xbios joystick port 1",0},
	{SDL_FALSE,"Joypad 0 port A",0},
	{SDL_FALSE,"Joypad 1 port A",0},
	{SDL_FALSE,"Joypad 2 port A",0},
	{SDL_FALSE,"Joypad 3 port A",0},
	{SDL_FALSE,"Joypad 0 port B",0},
	{SDL_FALSE,"Joypad 1 port B",0},
	{SDL_FALSE,"Joypad 2 port B",0},
	{SDL_FALSE,"Joypad 3 port B",0},
	{SDL_FALSE,"Joystick 0 port A",0},
	{SDL_FALSE,"Joystick 1 port A",0},
	{SDL_FALSE,"Joystick 0 port B",0},
	{SDL_FALSE,"Joystick 1 port B",0},
	{SDL_FALSE,"Lightpen port A",0},
	{SDL_FALSE,"Analog paddle port A",0},
	{SDL_FALSE,"Analog paddle port B",0}
	#if 0
	,{SDL_FALSE,"Joystick 0 parallel port",0},
	{SDL_FALSE,"Joystick 1 parallel port",0}
	#endif
	};

	static const int jp_buttons[JP_NUM_BUTTONS]={
	JP_FIRE0, JP_FIRE1, JP_FIRE2, JP_PAUSE,
	JP_OPTION, JP_KPMULT, JP_KPNUM, JP_KP0,
	JP_KP1, JP_KP2, JP_KP3, JP_KP4,
	JP_KP5, JP_KP6, JP_KP7, JP_KP8,
	JP_KP9
	};

	static SDL_bool joypad_ports_enabled=SDL_FALSE;
	static int has_teamtap[2]={TEAMTAP_MAYBE,TEAMTAP_MAYBE};

	/* Updated joypad ports */
	static Uint16 jp_paddles[4];
	static Uint16 jp_lightpens[2];
	static Uint16 jp_directions;
	static Uint16 jp_fires;
	static Uint32 jp_joypads[8];

	/--- Functions prototypes ---/

	static int GetEnabledAtariJoystick(int index);
	static void UpdateJoypads(void);

	/--- Functions ---/

	int SDL_SYS_JoystickInit(void)
	{
	int i;
	long cookie_mch;
	const char *envr=SDL_getenv("SDL_JOYSTICK_ATARI");

	#define TEST_JOY_ENABLED(env,idstring,num) \
	if (SDL_strstr(env,idstring"-off")) { \
	atarijoysticks[num].enabled=SDL_FALSE; \
	} \
	if (SDL_strstr(env,idstring"-on")) { \
	atarijoysticks[num].enabled=SDL_TRUE; \
	}

	/* Cookie _MCH present ? if not, assume ST machine */
	if (Getcookie(C__MCH, &cookie_mch) != C_FOUND) {
	cookie_mch = MCH_ST << 16;
	}

	/* Enable some default joysticks */
	if ((cookie_mch == MCH_ST<<16) \|\| ((cookie_mch>>16) == MCH_STE) \|\|
	(cookie_mch == MCH_TT<<16) \|\| (cookie_mch == MCH_F30<<16) \|\|
	(cookie_mch == MCH_ARANYM<<16))
	{
	atarijoysticks[IKBD_JOY1].enabled=(SDL_AtariIkbd_enabled!=0);
	}
	if ((cookie_mch == MCH_STE<<16) \|\| (cookie_mch == MCH_F30<<16) \|\|
	(cookie_mch == MCH_ARANYM<<16))
	{
	atarijoysticks[PORTA_PAD0].enabled =
	atarijoysticks[PORTA_PAD1].enabled =
	atarijoysticks[PORTA_PAD2].enabled =
	atarijoysticks[PORTA_PAD3].enabled =
	atarijoysticks[PORTB_PAD0].enabled =
	atarijoysticks[PORTB_PAD1].enabled =
	atarijoysticks[PORTB_PAD2].enabled =
	atarijoysticks[PORTB_PAD3].enabled = SDL_TRUE;
	}
	if (!atarijoysticks[IKBD_JOY1].enabled) {
	atarijoysticks[XBIOS_JOY1].enabled=(SDL_AtariXbios_enabled!=0);
	}

	/* Read environment for joysticks to enable */
	if (envr) {
	/* IKBD on any Atari, maybe clones */
	if ((cookie_mch == MCH_ST<<16) \|\| ((cookie_mch>>16) == MCH_STE) \|\|
	(cookie_mch == MCH_TT<<16) \|\| (cookie_mch == MCH_F30<<16) \|\|
	(cookie_mch == MCH_ARANYM<<16)) {
	if (SDL_AtariIkbd_enabled!=0) {
	TEST_JOY_ENABLED(envr, "ikbd-joy1", IKBD_JOY1);
	}
	}
	/* Joypads ports on STE, Falcon and maybe others */
	if ((cookie_mch == MCH_STE<<16) \|\| (cookie_mch == MCH_F30<<16) \|\|
	(cookie_mch == MCH_ARANYM<<16)) {
	TEST_JOY_ENABLED(envr, "porta-pad", PORTA_PAD0);
	if (!atarijoysticks[PORTA_PAD0].enabled) {
	TEST_JOY_ENABLED(envr, "porta-joy0", PORTA_JOY0);
	TEST_JOY_ENABLED(envr, "porta-joy1", PORTA_JOY1);
	if (!(atarijoysticks[PORTA_JOY0].enabled) && !(atarijoysticks[PORTA_JOY1].enabled)) {
	TEST_JOY_ENABLED(envr, "porta-lp", PORTA_LP);
	if (!atarijoysticks[PORTA_LP].enabled) {
	TEST_JOY_ENABLED(envr, "porta-anpad", PORTA_ANPAD);
	}
	}
	}

	TEST_JOY_ENABLED(envr, "portb-pad", PORTB_PAD0);
	if (!atarijoysticks[PORTB_PAD0].enabled) {
	TEST_JOY_ENABLED(envr, "portb-joy0", PORTB_JOY0);
	TEST_JOY_ENABLED(envr, "portb-joy1", PORTB_JOY1);
	if (!(atarijoysticks[PORTB_JOY0].enabled) && !(atarijoysticks[PORTB_JOY1].enabled)) {
	TEST_JOY_ENABLED(envr, "portb-anpad", PORTB_ANPAD);
	}
	}
	}

	if (!atarijoysticks[IKBD_JOY1].enabled) {
	if (SDL_AtariXbios_enabled!=0) {
	TEST_JOY_ENABLED(envr, "xbios-joy1", XBIOS_JOY1);
	}
	}
	#if 0
	/* Parallel port on any Atari, maybe clones */
	if ((cookie_mch == MCH_ST<<16) \|\| ((cookie_mch>>16) == MCH_STE) \|\|
	(cookie_mch == MCH_TT<<16) \|\| (cookie_mch == MCH_F30<<16)) {
	TEST_JOY_ENABLED(envr, "para-joy0", PARA_JOY0);
	TEST_JOY_ENABLED(envr, "para-joy1", PARA_JOY1);
	}
	#endif
	}

	/* Need to update joypad ports ? */
	joypad_ports_enabled=SDL_FALSE;
	for (i=PORTA_PAD0;i<=PORTB_ANPAD;i++) {
	if (atarijoysticks[i].enabled) {
	joypad_ports_enabled=SDL_TRUE;
	break;
	}
	}

	SDL_numjoysticks = 0;
	for (i=0;i<MAX_JOYSTICKS;i++) {
	if (atarijoysticks[i].enabled) {
	++SDL_numjoysticks;
	}
	}

	return(SDL_numjoysticks);
	}

	static int GetEnabledAtariJoystick(int index)
	{
	int i,j;

	/* Return the nth'index' enabled atari joystick */
	j=0;
	for (i=0;i<MAX_JOYSTICKS;i++) {
	if (!atarijoysticks[i].enabled) {
	continue;
	}

	if (j==index) {
	break;
	}

	++j;
	}
	if (i==MAX_JOYSTICKS)
	return -1;

	return i;
	}

	const char *SDL_SYS_JoystickName(int index)
	{
	int numjoystick;

	numjoystick=GetEnabledAtariJoystick(index);
	if (numjoystick==-1)
	return NULL;

	return(atarijoysticks[numjoystick].name);
	}

	int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
	{
	int numjoystick;

	numjoystick=GetEnabledAtariJoystick(joystick->index);
	if (numjoystick==-1)
	return -1;

	joystick->naxes=0;
	joystick->nhats=0;
	joystick->nballs=0;

	switch(numjoystick) {
	case PORTA_PAD0:
	case PORTA_PAD1:
	case PORTA_PAD2:
	case PORTA_PAD3:
	case PORTB_PAD0:
	case PORTB_PAD1:
	case PORTB_PAD2:
	case PORTB_PAD3:
	joystick->nhats=1;
	joystick->nbuttons=JP_NUM_BUTTONS;
	break;
	case PORTA_LP:
	case PORTA_ANPAD:
	case PORTB_ANPAD:
	joystick->naxes=2;
	joystick->nbuttons=2;
	break;
	default:
	joystick->nhats=1;
	joystick->nbuttons=1;
	break;
	}

	return(0);
	}

	/* Detect Teamtap using ghost events */
	static void detect_teamtap(int num_port)
	{
	int i,j;

	/* Check if joypad 1,2,3 triggered but not 0 */
	for (i=1; i<4; i++) {
	if (jp_joypads[num_port4+i] && (jp_joypads[num_port4]==0)) {
	has_teamtap[num_port] = TEAMTAP_YES;
	return;
	}
	}

	/* Check if joypad 0 on a given port triggered ghost events for
	* other joypads
	*/
	for (i=0; i<20; i++) {
	int with_teamtap=1;

	if (jp_joypads[num_port*4]!=teamtap_ghosts[i][0])
	continue;

	/* If any button on first joypad pressed, check other pads */
	for (j=1; j<4; j++) {
	if ((jp_joypads[num_port*4+j] & teamtap_ghosts[i][j])
	==teamtap_ghosts[i][j])
	{
	with_teamtap = 0;
	}
	}

	has_teamtap[num_port] = (with_teamtap ? TEAMTAP_YES : TEAMTAP_NO);
	break;
	}
	}

	void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
	{
	int numjoystick;
	Uint8 hatstate;
	Uint32 curstate,prevstate;

	numjoystick=GetEnabledAtariJoystick(joystick->index);
	if (numjoystick==-1)
	return;

	prevstate = atarijoysticks[numjoystick].prevstate;

	if (joypad_ports_enabled) {
	Supexec(UpdateJoypads);
	}

	switch (numjoystick) {
	case IKBD_JOY1:
	case XBIOS_JOY1:
	{
	curstate = 0;

	if (numjoystick==IKBD_JOY1) {
	curstate = SDL_AtariIkbd_joystick & 0xff;
	}
	if (numjoystick==XBIOS_JOY1) {
	curstate = SDL_AtariXbios_joystick & 0xff;
	}

	if (curstate != prevstate) {
	hatstate = SDL_HAT_CENTERED;
	if (curstate & IKBD_JOY_LEFT) {
	hatstate \|= SDL_HAT_LEFT;
	}
	if (curstate & IKBD_JOY_RIGHT) {
	hatstate \|= SDL_HAT_RIGHT;
	}
	if (curstate & IKBD_JOY_UP) {
	hatstate \|= SDL_HAT_UP;
	}
	if (curstate & IKBD_JOY_DOWN) {
	hatstate \|= SDL_HAT_DOWN;
	}
	SDL_PrivateJoystickHat(joystick, 0, hatstate);

	/* Button */
	if ((curstate & IKBD_JOY_FIRE) && !(prevstate & IKBD_JOY_FIRE)) {
	SDL_PrivateJoystickButton(joystick,0,SDL_PRESSED);
	}
	if (!(curstate & IKBD_JOY_FIRE) && (prevstate & IKBD_JOY_FIRE)) {
	SDL_PrivateJoystickButton(joystick,0,SDL_RELEASED);
	}
	}
	atarijoysticks[numjoystick].prevstate = curstate;
	}
	break;
	case PORTA_PAD0:
	case PORTA_PAD1:
	case PORTA_PAD2:
	case PORTA_PAD3:
	case PORTB_PAD0:
	case PORTB_PAD1:
	case PORTB_PAD2:
	case PORTB_PAD3:
	{
	int numjoypad,i,numport;

	numjoypad = numport = 0;
	switch(numjoystick) {
	case PORTA_PAD0:
	numjoypad = 0; break;
	case PORTA_PAD1:
	numjoypad = 1; break;
	case PORTA_PAD2:
	numjoypad = 2; break;
	case PORTA_PAD3:
	numjoypad = 3; break;
	case PORTB_PAD0:
	numjoypad = 4; numport = 1; break;
	case PORTB_PAD1:
	numjoypad = 5; numport = 1; break;
	case PORTB_PAD2:
	numjoypad = 6; numport = 1; break;
	case PORTB_PAD3:
	numjoypad = 7; numport = 1; break;
	}

	jp_joypads[numjoypad] &= 0xabffff;

	if (has_teamtap[numport]==TEAMTAP_MAYBE) {
	detect_teamtap(numport);
	}
	/* No events for PORTX_PAD[1,2,3] if no teamtap detected */
	if (has_teamtap[numport] == TEAMTAP_NO) {
	if ((numjoypad & 3)!=0) {
	return;
	}
	}

	curstate=jp_joypads[numjoypad];
	if (curstate!=prevstate) {
	hatstate = SDL_HAT_CENTERED;
	if (curstate & (1<<JP_LEFT)) {
	hatstate \|= SDL_HAT_LEFT;
	}
	if (curstate & (1<<JP_RIGHT)) {
	hatstate \|= SDL_HAT_RIGHT;
	}
	if (curstate & (1<<JP_UP)) {
	hatstate \|= SDL_HAT_UP;
	}
	if (curstate & (1<<JP_DOWN)) {
	hatstate \|= SDL_HAT_DOWN;
	}
	SDL_PrivateJoystickHat(joystick, 0, hatstate);

	/* Buttons */
	for (i=0;i<JP_NUM_BUTTONS;i++) {
	int button;

	button=1<<jp_buttons[i];

	if ((curstate & button) && !(prevstate & button)) {
	SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
	}
	if (!(curstate & button) && (prevstate & button)) {
	SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
	}
	}
	}
	atarijoysticks[numjoystick].prevstate = curstate;
	}
	break;
	case PORTA_JOY0:
	case PORTA_JOY1:
	case PORTB_JOY0:
	case PORTB_JOY1:
	{
	int fire_shift=0,dir_shift=0;

	if (numjoystick==PORTA_JOY0) { fire_shift=0; dir_shift=0; }
	if (numjoystick==PORTA_JOY1) { fire_shift=1; dir_shift=4; }
	if (numjoystick==PORTB_JOY0) { fire_shift=2; dir_shift=8; }
	if (numjoystick==PORTB_JOY1) { fire_shift=3; dir_shift=12; }

	curstate = (jp_directions>>dir_shift) & 15;
	curstate \|= ((jp_fires>>fire_shift) & 1)<<4;

	if (curstate != prevstate) {
	hatstate = SDL_HAT_CENTERED;
	if (curstate & PORT_JS_LEFT) {
	hatstate \|= SDL_HAT_LEFT;
	}
	if (curstate & PORT_JS_RIGHT) {
	hatstate \|= SDL_HAT_RIGHT;
	}
	if (curstate & PORT_JS_UP) {
	hatstate \|= SDL_HAT_UP;
	}
	if (curstate & PORT_JS_DOWN) {
	hatstate \|= SDL_HAT_DOWN;
	}
	SDL_PrivateJoystickHat(joystick, 0, hatstate);

	/* Button */
	if ((curstate & PORT_JS_FIRE) && !(prevstate & PORT_JS_FIRE)) {
	SDL_PrivateJoystickButton(joystick,0,SDL_PRESSED);
	}
	if (!(curstate & PORT_JS_FIRE) && (prevstate & PORT_JS_FIRE)) {
	SDL_PrivateJoystickButton(joystick,0,SDL_RELEASED);
	}
	}
	atarijoysticks[numjoystick].prevstate = curstate;
	}
	break;
	case PORTA_LP:
	{
	int i;

	curstate = jp_lightpens[0]>>1;
	curstate \|= (jp_lightpens[1]>>1)<<15;
	curstate \|= (jp_fires & 3)<<30;

	if (curstate != prevstate) {
	/* X axis */
	SDL_PrivateJoystickAxis(joystick,0,jp_lightpens[0] ^ 0x8000);
	/* Y axis */
	SDL_PrivateJoystickAxis(joystick,1,jp_lightpens[1] ^ 0x8000);
	/* Buttons */
	for (i=0;i<2;i++) {
	int button;

	button=1<<(30+i);

	if ((curstate & button) && !(prevstate & button)) {
	SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
	}
	if (!(curstate & button) && (prevstate & button)) {
	SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
	}
	}
	}
	atarijoysticks[numjoystick].prevstate = curstate;
	}
	break;
	case PORTA_ANPAD:
	case PORTB_ANPAD:
	{
	int numpaddle, i;

	numpaddle=0<<1;
	if (numjoystick==PORTB_ANPAD) numpaddle=1<<1;

	curstate = jp_paddles[numpaddle]>>1;
	curstate \|= (jp_paddles[numpaddle+1]>>1)<<15;
	curstate \|= ((jp_fires>>numpaddle) & 3)<<30;

	if (curstate != prevstate) {
	/* X axis */
	SDL_PrivateJoystickAxis(joystick,0,jp_paddles[numpaddle] ^ 0x8000);
	/* Y axis */
	SDL_PrivateJoystickAxis(joystick,1,jp_paddles[numpaddle+1] ^ 0x8000);
	/* Buttons */
	for (i=0;i<2;i++) {
	int button;

	button=1<<(30+i);

	if ((curstate & button) && !(prevstate & button)) {
	SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
	}
	if (!(curstate & button) && (prevstate & button)) {
	SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
	}
	}
	}
	atarijoysticks[numjoystick].prevstate = curstate;
	}
	break;
	#if 0
	case PARA_JOY0:
	case PARA_JOY1:
	break;
	#endif
	};

	return;
	}

	void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
	{
	return;
	}

	void SDL_SYS_JoystickQuit(void)
	{
	SDL_numjoysticks=0;
	return;
	}

	/--- Joypad I/O read/write interface ---/

	#define JOYPAD_IO_BASE (0xffff9200)
	struct JOYPAD_IO_S {
	Uint16 fires;
	Uint16 directions;
	Uint16 dummy1[6];
	Uint16 paddles[4];
	Uint16 dummy2[4];
	Uint16 lightpens[2];
	};
	#define JOYPAD_IO (((volatile struct JOYPAD_IO_S )JOYPAD_IO_BASE))

	static const Uint16 joypad_masks[8*4]={
	0xfffe, 0xfffd, 0xfffb, 0xfff7,
	0xfff0, 0xfff1, 0xfff2, 0xfff3,
	0xfff4, 0xfff5, 0xfff6, 0xfff8,
	0xfff9, 0xfffa, 0xfffc, 0xffff,
	0xffef, 0xffdf, 0xffbf, 0xff7f,
	0xff0f, 0xff1f, 0xff2f, 0xff3f,
	0xff4f, 0xff5f, 0xff6f, 0xff8f,
	0xff9f, 0xffaf, 0xffcf, 0xffff
	};

	static void UpdateJoypads(void)
	{
	Uint16 tmp, i, j;
	Uint32 cur_fire, cur_dir;

	/--- This function is called in supervisor mode ---/

	/* Update joysticks */
	jp_fires = (~(JOYPAD_IO.fires)) & 15;
	jp_directions = (~(JOYPAD_IO.directions));

	/* Update lightpen */
	tmp = JOYPAD_IO.lightpens[0] & 1023;
	jp_lightpens[0] = (tmp<<6) \| (tmp>>4);
	tmp = JOYPAD_IO.lightpens[1] & 1023;
	jp_lightpens[1] = (tmp<<6) \| (tmp>>4);

	/* Update paddles */
	tmp = (JOYPAD_IO.paddles[0] & 255);
	jp_paddles[0] = (tmp<<8) \| tmp;
	tmp = (JOYPAD_IO.paddles[1] & 255);
	jp_paddles[1] = (tmp<<8) \| tmp;
	tmp = (JOYPAD_IO.paddles[2] & 255);
	jp_paddles[2] = (tmp<<8) \| tmp;
	tmp = (JOYPAD_IO.paddles[3] & 255);
	jp_paddles[3] = (tmp<<8) \| tmp;

	/* Update joypads on teamtap port A */
	for (i=0; i<4; i++) {
	jp_joypads[i] = 0;
	for (j=0; j<4; j++) {
	JOYPAD_IO.directions = joypad_masks[(i*4)+j];

	cur_fire = (~(JOYPAD_IO.fires) & 3)<<16;
	cur_dir = (~(JOYPAD_IO.directions)>>8) & 15;

	jp_joypads[i] \|= cur_fire<<(j*2);
	jp_joypads[i] \|= cur_dir<<(j*4);
	}
	}

	/* Update joypads on teamtap port B */
	for (i=4; i<8; i++) {
	jp_joypads[i] = 0;
	for (j=0; j<4; j++) {
	JOYPAD_IO.directions = joypad_masks[(i*4)+j];

	cur_fire = (~(JOYPAD_IO.fires) & 0xc)<<14;
	cur_dir = (~(JOYPAD_IO.directions)>>12) & 15;

	jp_joypads[i] \|= cur_fire<<(j*2);
	jp_joypads[i] \|= cur_dir<<(j*4);
	}
	}

	JOYPAD_IO.directions=0xffff;
	}

	#endif /* SDL_JOYSTICK_MINT */