input/dos_joyc.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 /*
  15  * $Source: /cvs/cvsroot/d2x/input/dos_joyc.c,v $
  16  * $Revision: 1.3 $
  17  * $Author: bradleyb $
  18  * $Date: 2001-01-29 14:03:56 $
  19  *
  20  * Routines for joystick reading.
  21  *
  22  * $Log: not supported by cvs2svn $
  23  * Revision 1.2  2001/01/24 04:29:45  bradleyb
  24  * changed args_find to FindArg
  25  *
  26  * Revision 1.1.1.2  2001/01/19 03:33:52  bradleyb
  27  * Import of d2x-0.0.9-pre1
  28  *
  29  * Revision 1.1.1.1  1999/06/14 21:58:26  donut
  30  * Import of d1x 1.37 source.
  31  *
  32  * Revision 1.37  1995/10/07  13:22:31  john
  33  * Added new method of reading joystick that allows higher-priority
  34  * interrupts to go off.
  35  *
  36  * Revision 1.36  1995/03/30  11:03:40  john
  37  * Made -JoyBios read buttons using BIOS.
  38  *
  39  * Revision 1.35  1995/02/14  11:39:25  john
  40  * Added polled/bios joystick readers..
  41  *
  42  * Revision 1.34  1995/02/10  17:06:12  john
  43  * Fixed bug with plugging in a joystick not getting detected.
  44  *
  45  * Revision 1.33  1995/01/27  16:39:42  john
  46  * Made so that if no joystick detected, it wont't
  47  * read buttons.
  48  *
  49  * Revision 1.32  1995/01/12  13:16:40  john
  50  * Made it so that joystick can't lose an axis
  51  * by 1 weird reading. Reading has to occurr during
  52  * calibration for this to happen.
  53  *
  54  * Revision 1.31  1994/12/28  15:56:03  john
  55  * Fixed bug that refused to read joysticks whose
  56  * min,cen,max were less than 100 apart.
  57  *
  58  * Revision 1.30  1994/12/28  15:31:53  john
  59  * Added code to read joystick axis not all at one time.
  60  *
  61  * Revision 1.29  1994/12/27  15:44:36  john
  62  * Made the joystick timeout be at 1/100th of a second,
  63  * regardless of CPU speed.
  64  *
  65  * Revision 1.28  1994/12/04  11:54:54  john
  66  * Made stick read at whatever rate the clock is at, not
  67  * at 18.2 times/second.
  68  *
  69  * Revision 1.27  1994/11/29  02:25:40  john
  70  * Made it so that the scaled reading returns 0
  71  * if the calibration factors look funny..
  72  *
  73  * Revision 1.26  1994/11/22  11:08:07  john
  74  * Commented out the ARCADE joystick.
  75  *
  76  * Revision 1.25  1994/11/14  19:40:26  john
  77  * Fixed bug with no joystick being detected.
  78  *
  79  * Revision 1.24  1994/11/14  19:36:40  john
  80  * Took out initial cheapy calibration.
  81  *
  82  * Revision 1.23  1994/11/14  19:13:27  john
  83  * Took out the calibration in joy_init
  84  *
  85  * Revision 1.22  1994/10/17  10:09:57  john
  86  * Made the state look at last_State, so that a joy_flush
  87  * doesn't cause a new down state to be added next reading.
  88  *
  89  * Revision 1.21  1994/10/13  11:36:23  john
  90  * Made joy_down_time be kept track of in fixed seconds,
  91  * not ticks.
  92  *
  93  * Revision 1.20  1994/10/12  16:58:50  john
  94  * Fixed bug w/ previous comment.
  95  *
  96  * Revision 1.19  1994/10/12  16:57:44  john
  97  * Added function to set a joystick button's state.
  98  *
  99  * Revision 1.18  1994/10/11  10:20:13  john
 100  * Fixed Flightstick Pro/
 101  * ..
 102  *
 103  * Revision 1.17  1994/09/29  18:29:20  john
 104  * *** empty log message ***
 105  *
 106  * Revision 1.16  1994/09/27  19:17:23  john
 107  * Added code so that is joy_init is never called, joystick is not
 108  * used at all.
 109  *
 110  * Revision 1.15  1994/09/22  16:09:23  john
 111  * Fixed some virtual memory lockdown problems with timer and
 112  * joystick.
 113  *
 114  * Revision 1.14  1994/09/16  11:44:42  john
 115  * Fixed bug with slow joystick.
 116  *
 117  * Revision 1.13  1994/09/16  11:36:15  john
 118  * Fixed bug with reading non-present channels.
 119  *
 120  * Revision 1.12  1994/09/15  20:52:48  john
 121  * rme john
 122  * Added support for the Arcade style joystick.
 123  *
 124  * Revision 1.11  1994/09/13  20:04:49  john
 125  * Fixed bug with joystick button down_time.
 126  *
 127  * Revision 1.10  1994/09/10  13:48:07  john
 128  * Made all 20 buttons read.
 129  *
 130  * Revision 1.9  1994/08/31  09:55:02  john
 131  * *** empty log message ***
 132  *
 133  * Revision 1.8  1994/08/29  21:02:14  john
 134  * Added joy_set_cal_values...
 135  *
 136  * Revision 1.7  1994/08/29  20:52:17  john
 137  * Added better cyberman support; also, joystick calibration
 138  * value return funcctiionn,
 139  *
 140  * Revision 1.6  1994/08/24  18:53:12  john
 141  * Made Cyberman read like normal mouse; added dpmi module; moved
 142  * mouse from assembly to c. Made mouse buttons return time_down.
 143  *
 144  * Revision 1.5  1994/07/14  22:12:23  john
 145  * Used intrinsic forms of outp to fix vmm error.
 146  *
 147  * Revision 1.4  1994/07/07  19:52:59  matt
 148  * Made joy_init() return success/fail flag
 149  * Made joy_init() properly detect a stick if one is plugged in after joy_init()
 150  * was called the first time.
 151  *
 152  * Revision 1.3  1994/07/01  10:55:55  john
 153  * Fixed some bugs... added support for 4 axis.
 154  *
 155  * Revision 1.2  1994/06/30  20:36:55  john
 156  * Revamped joystick code.
 157  *
 158  * Revision 1.1  1994/06/30  15:42:15  john
 159  * Initial revision
 160  *
 161  *
 162  */
 163
 164 #ifdef HAVE_CONFIG_H
 165 #include <conf.h>
 166 #endif
 167
 168 #include <stdlib.h>
 169 #include <stdio.h>
 170 #include <dos.h>
 171
 172 //#define ARCADE 1
 173
 174 #include "pstypes.h"
 175 #include "mono.h"
 176 #include "joy.h"
 177 #include "u_dpmi.h"
 178 #include "timer.h"
 179
 180 #include "args.h"
 181
 182 extern int joy_bogus_reading;
 183 int JOY_PORT = 513; //201h;
 184 int joy_deadzone = 0;
 185
 186 int joy_read_stick_asm2( int read_masks, int * event_buffer, int timeout );
 187 int joy_read_stick_friendly2( int read_masks, int * event_buffer, int timeout );
 188 int joy_read_stick_polled2( int read_masks, int * event_buffer, int timeout );
 189 int joy_read_stick_bios2( int read_masks, int * event_buffer, int timeout );
 190 int joy_read_buttons_bios2();
 191 void joy_read_buttons_bios_end2();
 192
 193
 194 //In key.c
 195 // ebx = read mask
 196 // edi = pointer to buffer
 197 // returns number of events
 198
 199 char joy_installed = 0;
 200 char joy_present = 0;
 201
 202 typedef struct Button_info {
 203         ubyte           ignore;
 204         ubyte           state;
 205         ubyte           last_state;
 206         int             timedown;
 207         ubyte           downcount;
 208         ubyte           upcount;
 209 } Button_info;
 210
 211 typedef struct Joy_info {
 212         ubyte                   present_mask;
 213         ubyte                   slow_read;
 214         int                     max_timer;
 215         int                     read_count;
 216         ubyte                   last_value;
 217         Button_info     buttons[MAX_BUTTONS];
 218         int                     axis_min[4];
 219         int                     axis_center[4];
 220         int                     axis_max[4];
 221 } Joy_info;
 222
 223 Joy_info joystick;
 224
 225 ubyte joy_read_buttons()
 226 {
 227  return ((~(inp(JOY_PORT) >> 4))&0xf);
 228 }
 229
 230 void joy_get_cal_vals(int *axis_min, int *axis_center, int *axis_max)
 231 {
 232         int i;
 233
 234         for (i=0; i<4; i++)             {
 235                 axis_min[i] = joystick.axis_min[i];
 236                 axis_center[i] = joystick.axis_center[i];
 237                 axis_max[i] = joystick.axis_max[i];
 238         }
 239 }
 240
 241 void joy_set_cal_vals(int *axis_min, int *axis_center, int *axis_max)
 242 {
 243         int i;
 244
 245         for (i=0; i<4; i++)             {
 246                 joystick.axis_min[i] = axis_min[i];
 247                 joystick.axis_center[i] = axis_center[i];
 248                 joystick.axis_max[i] = axis_max[i];
 249         }
 250 }
 251
 252
 253 ubyte joy_get_present_mask()    {
 254         return joystick.present_mask;
 255 }
 256
 257 void joy_set_timer_rate(int max_value ) {
 258         _disable();
 259         joystick.max_timer = max_value;
 260         _enable();
 261 }
 262
 263 int joy_get_timer_rate()        {
 264         return joystick.max_timer;
 265 }
 266
 267
 268 void joy_flush()        {
 269         int i;
 270
 271         if (!joy_installed) return;
 272
 273         _disable();
 274         for (i=0; i<MAX_BUTTONS; i++ )  {
 275                 joystick.buttons[i].ignore = 0;
 276                 joystick.buttons[i].state = 0;
 277                 joystick.buttons[i].timedown = 0;
 278                 joystick.buttons[i].downcount = 0;
 279                 joystick.buttons[i].upcount = 0;
 280         }
 281         _enable();
 282
 283 }
 284
 285
 286 void joy_handler(int ticks_this_time)   {
 287         ubyte value;
 288         int i, state;
 289         Button_info * button;
 290
 291 //      joystick.max_timer = ticks_this_time;
 292
 293         if ( joystick.slow_read & JOY_BIOS_READINGS )           {
 294                 joystick.read_count++;
 295                 if ( joystick.read_count > 7 )  {
 296                         joystick.read_count = 0;
 297                         value = joy_read_buttons_bios2();
 298                         joystick.last_value = value;
 299                 } else {
 300                         value = joystick.last_value;
 301                 }
 302         } else {
 303                 value = joy_read_buttons(); //JOY_READ_BUTTONS;
 304         }
 305
 306         for (i=0; i<MAX_BUTTONS; i++ )  {
 307                 button = &joystick.buttons[i];
 308                 if (!button->ignore) {
 309                         if ( i < 5 )
 310                                 state = (value >> i) & 1;
 311                         else if (i==(value+4))
 312                                 state = 1;
 313                         else
 314                                 state = 0;
 315
 316                         if ( button->last_state == state )      {
 317                                 if (state) button->timedown += ticks_this_time;
 318                         } else {
 319                                 if (state)      {
 320                                         button->downcount += state;
 321                                         button->state = 1;
 322                                 } else {
 323                                         button->upcount += button->state;
 324                                         button->state = 0;
 325                                 }
 326                                 button->last_state = state;
 327                         }
 328                 }
 329         }
 330 }
 331
 332 void joy_handler_end()  {               // Dummy function to help calculate size of joystick handler function
 333 }
 334
 335
 336 ubyte joy_read_raw_buttons()    {
 337         if ( joystick.slow_read & JOY_BIOS_READINGS )
 338                 return joy_read_buttons_bios2();
 339         else
 340                 return joy_read_buttons(); //JOY_READ_BUTTONS;
 341 }
 342
 343 void joy_set_slow_reading(int flag)
 344 {
 345         joystick.slow_read |= flag;
 346         joy_set_cen();
 347 }
 348
 349 ubyte joystick_read_raw_axis( ubyte mask, int * axis )
 350 {
 351         ubyte read_masks, org_masks;
 352         int t, t1, t2, buffer[4*2+2];
 353         int e, i, num_channels, c;
 354
 355         axis[0] = 0; axis[1] = 0;
 356         axis[2] = 0; axis[3] = 0;
 357
 358         if (!joy_installed) return 0;
 359
 360         read_masks = 0;
 361         org_masks = mask;
 362
 363         mask &= joystick.present_mask;                  // Don't read non-present channels
 364         if ( mask==0 )  {
 365                 return 0;               // Don't read if no stick connected.
 366         }
 367
 368         if ( joystick.slow_read & JOY_SLOW_READINGS )   {
 369                 for (c=0; c<4; c++ )    {
 370                         if ( mask & (1 << c))   {
 371                                 // Time out at  (1/100th of a second)
 372
 373                                 if ( joystick.slow_read & JOY_POLLED_READINGS )
 374                                         num_channels = joy_read_stick_polled2( (1 << c), buffer, 65536 );
 375                                 else if ( joystick.slow_read & JOY_BIOS_READINGS )
 376                                         num_channels = joy_read_stick_bios2( (1 << c), buffer, 65536 );
 377                                 else if ( joystick.slow_read & JOY_FRIENDLY_READINGS )
 378                                         num_channels = joy_read_stick_friendly2( (1 << c), buffer, (1193180/100) );
 379                                 else
 380                                         num_channels = joy_read_stick_asm2( (1 << c), buffer, (1193180/100) );
 381
 382                                 if ( num_channels > 0 ) {
 383                                         t1 = buffer[0];
 384                                         e = buffer[1];
 385                                         t2 = buffer[2];
 386                                         if ( joystick.slow_read & (JOY_POLLED_READINGS|JOY_BIOS_READINGS) )     {
 387                                                 t = t2 - t1;
 388                                         } else {
 389                                                 if ( t1 > t2 )
 390                                                         t = t1 - t2;
 391                                                 else                            {
 392                                                         t = t1 + joystick.max_timer - t2;
 393                                                         //mprintf( 0, "%d, %d, %d, %d\n", t1, t2, joystick.max_timer, t );
 394                                                 }
 395                                         }
 396
 397                                         if ( e & 1 ) { axis[0] = t; read_masks |= 1; }
 398                                         if ( e & 2 ) { axis[1] = t; read_masks |= 2; }
 399                                         if ( e & 4 ) { axis[2] = t; read_masks |= 4; }
 400                                         if ( e & 8 ) { axis[3] = t; read_masks |= 8; }
 401                                 }
 402                         }
 403                 }
 404         } else {
 405                 // Time out at  (1/100th of a second)
 406                 if ( joystick.slow_read & JOY_POLLED_READINGS )
 407                         num_channels = joy_read_stick_polled2( mask, buffer, 65536 );
 408                 else if ( joystick.slow_read & JOY_BIOS_READINGS )
 409                         num_channels = joy_read_stick_bios2( mask, buffer, 65536 );
 410                 else if ( joystick.slow_read & JOY_FRIENDLY_READINGS )
 411                         num_channels = joy_read_stick_friendly2( mask, buffer, (1193180/100) );
 412                 else
 413                         num_channels = joy_read_stick_asm2( mask, buffer, (1193180/100) );
 414                 //mprintf(( 0, "(%d)\n", num_channels ));
 415
 416                 for (i=0; i<num_channels; i++ ) {
 417                         t1 = buffer[0];
 418                         t2 = buffer[i*2+2];
 419
 420                         if ( joystick.slow_read & (JOY_POLLED_READINGS|JOY_BIOS_READINGS) )     {
 421                                 t = t2 - t1;
 422                         } else {
 423                                 if ( t1 > t2 )
 424                                         t = t1 - t2;
 425                                 else                            {
 426                                         t = t1 + joystick.max_timer - t2;
 427                                         //mprintf(( 0, "%d, %d, %d, %d\n", t1, t2, joystick.max_timer, t ));
 428                                 }
 429                         }
 430                         e = buffer[i*2+1];
 431
 432                         if ( e & 1 ) { axis[0] = t; read_masks |= 1; }
 433                         if ( e & 2 ) { axis[1] = t; read_masks |= 2; }
 434                         if ( e & 4 ) { axis[2] = t; read_masks |= 4; }
 435                         if ( e & 8 ) { axis[3] = t; read_masks |= 8; }
 436                 }
 437
 438         }
 439
 440         return read_masks;
 441 }
 442
 443 #ifdef __GNUC__
 444 #define near
 445 #endif
 446
 447 int joy_init()
 448 {
 449         int i;
 450         int temp_axis[4];
 451
 452 //        if(FindArg("-joy209"))
 453 //         use_alt_joyport=1;
 454         if(FindArg("-joy209"))
 455          JOY_PORT = 521;  //209h;
 456
 457         joy_flush();
 458
 459         _disable();
 460         for (i=0; i<MAX_BUTTONS; i++ )
 461                 joystick.buttons[i].last_state = 0;
 462         _enable();
 463
 464         if ( !joy_installed )   {
 465                 joy_present = 0;
 466                 joy_installed = 1;
 467                 //joystick.max_timer = 65536;
 468                 joystick.slow_read = 0;
 469                 joystick.read_count = 0;
 470                 joystick.last_value = 0;
 471
 472                 //--------------- lock everything for the virtal memory ----------------------------------
 473                 if (!dpmi_lock_region ((void near *)joy_read_buttons_bios2, (char *)joy_read_buttons_bios_end2 - (char near *)joy_read_buttons_bios2))   {
 474                         printf( "Error locking joystick handler (read bios)!\n" );
 475                         exit(1);
 476                 }
 477
 478
 479
 480                 if (!dpmi_lock_region ((void near *)joy_handler, (char *)joy_handler_end - (char near *)joy_handler))   {
 481                         printf( "Error locking joystick handler!\n" );
 482                         exit(1);
 483                 }
 484
 485                 if (!dpmi_lock_region (&joystick, sizeof(Joy_info)))    {
 486                         printf( "Error locking joystick handler's data!\n" );
 487                         exit(1);
 488                 }
 489
 490                 timer_set_joyhandler(joy_handler);
 491         }
 492
 493         // Do initial cheapy calibration...
 494         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 495         do      {
 496                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, temp_axis );
 497         } while( joy_bogus_reading );
 498
 499         if ( joystick.present_mask & 3 )
 500                 joy_present = 1;
 501         else
 502                 joy_present = 0;
 503
 504         return joy_present;
 505 }
 506
 507 void joy_close()
 508 {
 509         if (!joy_installed) return;
 510         joy_installed = 0;
 511 }
 512
 513 void joy_set_ul()
 514 {
 515         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 516         do      {
 517                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, joystick.axis_min );
 518         } while( joy_bogus_reading );
 519         if ( joystick.present_mask & 3 )
 520                 joy_present = 1;
 521         else
 522                 joy_present = 0;
 523 }
 524
 525 void joy_set_lr()
 526 {
 527         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 528         do {
 529                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, joystick.axis_max );
 530         } while( joy_bogus_reading );
 531
 532         if ( joystick.present_mask & 3 )
 533                 joy_present = 1;
 534         else
 535                 joy_present = 0;
 536 }
 537
 538 void joy_set_cen()
 539 {
 540         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 541         do {
 542                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, joystick.axis_center );
 543         } while( joy_bogus_reading );
 544
 545         if ( joystick.present_mask & 3 )
 546                 joy_present = 1;
 547         else
 548                 joy_present = 0;
 549 }
 550
 551 void joy_set_cen_fake(int channel)
 552 {
 553
 554         int i,n=0;
 555         int minx, maxx, cenx;
 556
 557         minx=maxx=cenx=0;
 558
 559         for (i=0; i<4; i++ )    {
 560                 if ( (joystick.present_mask & (1<<i)) && (i!=channel) ) {
 561                         n++;
 562                         minx += joystick.axis_min[i];
 563                         maxx += joystick.axis_max[i];
 564                         cenx += joystick.axis_center[i];
 565                 }
 566         }
 567         minx /= n;
 568         maxx /= n;
 569         cenx /= n;
 570
 571         joystick.axis_min[channel] = minx;
 572         joystick.axis_max[channel] = maxx;
 573         joystick.axis_center[channel] = cenx;
 574 }
 575
 576 int joy_get_scaled_reading( int raw, int axn )
 577 {
 578  int x, d, dz;
 579
 580  // Make sure it's calibrated properly.
 581 //added/changed on 8/14/98 to allow smaller calibrating sticks to work (by Eivind Brendryen)--was <5
 582    if ( joystick.axis_center[axn] - joystick.axis_min[axn] < 2 )
 583     return 0;
 584    if ( joystick.axis_max[axn] - joystick.axis_center[axn] < 2 )
 585     return 0;
 586 //end change - Victor Rachels  (by Eivind Brendryen)
 587
 588   raw -= joystick.axis_center[axn];
 589
 590    if ( raw < 0 )
 591     d = joystick.axis_center[axn]-joystick.axis_min[axn];
 592    else
 593     d = joystick.axis_max[axn]-joystick.axis_center[axn];
 594
 595
 596    if ( d )
 597     x = (raw << 7) / d;
 598    else
 599     x = 0;
 600
 601
 602    if ( x < -128 )
 603     x = -128;
 604    if ( x > 127 )
 605     x = 127;
 606
 607 //added on 4/13/99 by Victor Rachels to add deadzone control
 608   dz =  (joy_deadzone) * 6;
 609    if ((x > (-1*dz)) && (x < dz))
 610     x = 0;
 611 //end this section addition -VR
 612
 613   return x;
 614 }
 615
 616 int last_reading[4] = { 0, 0, 0, 0 };
 617
 618 void joy_get_pos( int *x, int *y )
 619 {
 620         ubyte flags;
 621         int axis[4];
 622
 623         if ((!joy_installed)||(!joy_present)) { *x=*y=0; return; }
 624
 625         flags=joystick_read_raw_axis( JOY_1_X_AXIS+JOY_1_Y_AXIS, axis );
 626
 627         if ( joy_bogus_reading )        {
 628                 axis[0] = last_reading[0];
 629                 axis[1] = last_reading[1];
 630                 flags = JOY_1_X_AXIS+JOY_1_Y_AXIS;
 631         } else {
 632                 last_reading[0] = axis[0];
 633                 last_reading[1] = axis[1];
 634         }
 635
 636         if ( flags & JOY_1_X_AXIS )
 637                 *x = joy_get_scaled_reading( axis[0], 0 );
 638         else
 639                 *x = 0;
 640
 641         if ( flags & JOY_1_Y_AXIS )
 642                 *y = joy_get_scaled_reading( axis[1], 1 );
 643         else
 644                 *y = 0;
 645 }
 646
 647 ubyte joy_read_stick( ubyte masks, int *axis )
 648 {
 649         ubyte flags;
 650         int raw_axis[4];
 651
 652         if ((!joy_installed)||(!joy_present)) {
 653                 axis[0] = 0; axis[1] = 0;
 654                 axis[2] = 0; axis[3] = 0;
 655                 return 0;
 656         }
 657
 658         flags=joystick_read_raw_axis( masks, raw_axis );
 659
 660         if ( joy_bogus_reading )        {
 661                 axis[0] = last_reading[0];
 662                 axis[1] = last_reading[1];
 663                 axis[2] = last_reading[2];
 664                 axis[3] = last_reading[3];
 665                 flags = masks;
 666         } else {
 667                 last_reading[0] = axis[0];
 668                 last_reading[1] = axis[1];
 669                 last_reading[2] = axis[2];
 670                 last_reading[3] = axis[3];
 671         }
 672
 673         if ( flags & JOY_1_X_AXIS )
 674                 axis[0] = joy_get_scaled_reading( raw_axis[0], 0 );
 675         else
 676                 axis[0] = 0;
 677
 678         if ( flags & JOY_1_Y_AXIS )
 679                 axis[1] = joy_get_scaled_reading( raw_axis[1], 1 );
 680         else
 681                 axis[1] = 0;
 682
 683         if ( flags & JOY_2_X_AXIS )
 684                 axis[2] = joy_get_scaled_reading( raw_axis[2], 2 );
 685         else
 686                 axis[2] = 0;
 687
 688         if ( flags & JOY_2_Y_AXIS )
 689                 axis[3] = joy_get_scaled_reading( raw_axis[3], 3 );
 690         else
 691                 axis[3] = 0;
 692
 693         return flags;
 694 }
 695
 696
 697 int joy_get_btns()
 698 {
 699         if ((!joy_installed)||(!joy_present)) return 0;
 700
 701         return joy_read_raw_buttons();
 702 }
 703
 704 void joy_get_btn_down_cnt( int *btn0, int *btn1 )
 705 {
 706         if ((!joy_installed)||(!joy_present)) { *btn0=*btn1=0; return; }
 707
 708         _disable();
 709         *btn0 = joystick.buttons[0].downcount;
 710         joystick.buttons[0].downcount = 0;
 711         *btn1 = joystick.buttons[1].downcount;
 712         joystick.buttons[1].downcount = 0;
 713         _enable();
 714 }
 715
 716 int joy_get_button_state( int btn )
 717 {
 718         int count;
 719
 720         if ((!joy_installed)||(!joy_present)) return 0;
 721
 722         if ( btn >= MAX_BUTTONS ) return 0;
 723
 724         _disable();
 725         count = joystick.buttons[btn].state;
 726         _enable();
 727
 728         return  count;
 729 }
 730
 731 int joy_get_button_up_cnt( int btn )
 732 {
 733         int count;
 734
 735         if ((!joy_installed)||(!joy_present)) return 0;
 736
 737         if ( btn >= MAX_BUTTONS ) return 0;
 738
 739         _disable();
 740         count = joystick.buttons[btn].upcount;
 741         joystick.buttons[btn].upcount = 0;
 742         _enable();
 743
 744         return count;
 745 }
 746
 747 int joy_get_button_down_cnt( int btn )
 748 {
 749         int count;
 750
 751         if ((!joy_installed)||(!joy_present)) return 0;
 752         if ( btn >= MAX_BUTTONS ) return 0;
 753
 754         _disable();
 755         count = joystick.buttons[btn].downcount;
 756         joystick.buttons[btn].downcount = 0;
 757         _enable();
 758
 759         return count;
 760 }
 761
 762
 763 fix joy_get_button_down_time( int btn )
 764 {
 765         fix count;
 766
 767         if ((!joy_installed)||(!joy_present)) return 0;
 768         if ( btn >= MAX_BUTTONS ) return 0;
 769
 770         _disable();
 771         count = joystick.buttons[btn].timedown;
 772         joystick.buttons[btn].timedown = 0;
 773         _enable();
 774
 775         return fixmuldiv(count, 65536, 1193180 );
 776 }
 777
 778 void joy_get_btn_up_cnt( int *btn0, int *btn1 )
 779 {
 780         if ((!joy_installed)||(!joy_present)) { *btn0=*btn1=0; return; }
 781
 782         _disable();
 783         *btn0 = joystick.buttons[0].upcount;
 784         joystick.buttons[0].upcount = 0;
 785         *btn1 = joystick.buttons[1].upcount;
 786         joystick.buttons[1].upcount = 0;
 787         _enable();
 788 }
 789
 790 void joy_set_btn_values( int btn, int state, fix timedown, int downcount, int upcount )
 791 {
 792         _disable();
 793         joystick.buttons[btn].ignore = 1;
 794         joystick.buttons[btn].state = state;
 795         joystick.buttons[btn].timedown = fixmuldiv( timedown, 1193180, 65536 );
 796         joystick.buttons[btn].downcount = downcount;
 797         joystick.buttons[btn].upcount = upcount;
 798         _enable();
 799 }
 800
 801 void joy_poll()
 802 {
 803         if ( joystick.slow_read & JOY_BIOS_READINGS )
 804                 joystick.last_value = joy_read_buttons_bios2();
 805 }