arch/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  * $Source: /cvs/cvsroot/d2x/arch/dos/joyc.c,v $
  15  * $Revision: 1.1.1.1 $
  16  * $Author: bradleyb $
  17  * $Date: 2001-01-19 03:30:15 $
  18  *
  19  * Routines for joystick reading.
  20  *
  21  * $Log: not supported by cvs2svn $
  22  * Revision 1.1.1.1  1999/06/14 21:58:26  donut
  23  * Import of d1x 1.37 source.
  24  *
  25  * Revision 1.37  1995/10/07  13:22:31  john
  26  * Added new method of reading joystick that allows higher-priority
  27  * interrupts to go off.
  28  *
  29  * Revision 1.36  1995/03/30  11:03:40  john
  30  * Made -JoyBios read buttons using BIOS.
  31  *
  32  * Revision 1.35  1995/02/14  11:39:25  john
  33  * Added polled/bios joystick readers..
  34  *
  35  * Revision 1.34  1995/02/10  17:06:12  john
  36  * Fixed bug with plugging in a joystick not getting detected.
  37  *
  38  * Revision 1.33  1995/01/27  16:39:42  john
  39  * Made so that if no joystick detected, it wont't
  40  * read buttons.
  41  *
  42  * Revision 1.32  1995/01/12  13:16:40  john
  43  * Made it so that joystick can't lose an axis
  44  * by 1 weird reading. Reading has to occurr during
  45  * calibration for this to happen.
  46  *
  47  * Revision 1.31  1994/12/28  15:56:03  john
  48  * Fixed bug that refused to read joysticks whose
  49  * min,cen,max were less than 100 apart.
  50  *
  51  * Revision 1.30  1994/12/28  15:31:53  john
  52  * Added code to read joystick axis not all at one time.
  53  *
  54  * Revision 1.29  1994/12/27  15:44:36  john
  55  * Made the joystick timeout be at 1/100th of a second,
  56  * regardless of CPU speed.
  57  *
  58  * Revision 1.28  1994/12/04  11:54:54  john
  59  * Made stick read at whatever rate the clock is at, not
  60  * at 18.2 times/second.
  61  *
  62  * Revision 1.27  1994/11/29  02:25:40  john
  63  * Made it so that the scaled reading returns 0
  64  * if the calibration factors look funny..
  65  *
  66  * Revision 1.26  1994/11/22  11:08:07  john
  67  * Commented out the ARCADE joystick.
  68  *
  69  * Revision 1.25  1994/11/14  19:40:26  john
  70  * Fixed bug with no joystick being detected.
  71  *
  72  * Revision 1.24  1994/11/14  19:36:40  john
  73  * Took out initial cheapy calibration.
  74  *
  75  * Revision 1.23  1994/11/14  19:13:27  john
  76  * Took out the calibration in joy_init
  77  *
  78  * Revision 1.22  1994/10/17  10:09:57  john
  79  * Made the state look at last_State, so that a joy_flush
  80  * doesn't cause a new down state to be added next reading.
  81  *
  82  * Revision 1.21  1994/10/13  11:36:23  john
  83  * Made joy_down_time be kept track of in fixed seconds,
  84  * not ticks.
  85  *
  86  * Revision 1.20  1994/10/12  16:58:50  john
  87  * Fixed bug w/ previous comment.
  88  *
  89  * Revision 1.19  1994/10/12  16:57:44  john
  90  * Added function to set a joystick button's state.
  91  *
  92  * Revision 1.18  1994/10/11  10:20:13  john
  93  * Fixed Flightstick Pro/
  94  * ..
  95  *
  96  * Revision 1.17  1994/09/29  18:29:20  john
  97  * *** empty log message ***
  98  *
  99  * Revision 1.16  1994/09/27  19:17:23  john
 100  * Added code so that is joy_init is never called, joystick is not
 101  * used at all.
 102  *
 103  * Revision 1.15  1994/09/22  16:09:23  john
 104  * Fixed some virtual memory lockdown problems with timer and
 105  * joystick.
 106  *
 107  * Revision 1.14  1994/09/16  11:44:42  john
 108  * Fixed bug with slow joystick.
 109  *
 110  * Revision 1.13  1994/09/16  11:36:15  john
 111  * Fixed bug with reading non-present channels.
 112  *
 113  * Revision 1.12  1994/09/15  20:52:48  john
 114  * rme john
 115  * Added support for the Arcade style joystick.
 116  *
 117  * Revision 1.11  1994/09/13  20:04:49  john
 118  * Fixed bug with joystick button down_time.
 119  *
 120  * Revision 1.10  1994/09/10  13:48:07  john
 121  * Made all 20 buttons read.
 122  *
 123  * Revision 1.9  1994/08/31  09:55:02  john
 124  * *** empty log message ***
 125  *
 126  * Revision 1.8  1994/08/29  21:02:14  john
 127  * Added joy_set_cal_values...
 128  *
 129  * Revision 1.7  1994/08/29  20:52:17  john
 130  * Added better cyberman support; also, joystick calibration
 131  * value return funcctiionn,
 132  *
 133  * Revision 1.6  1994/08/24  18:53:12  john
 134  * Made Cyberman read like normal mouse; added dpmi module; moved
 135  * mouse from assembly to c. Made mouse buttons return time_down.
 136  *
 137  * Revision 1.5  1994/07/14  22:12:23  john
 138  * Used intrinsic forms of outp to fix vmm error.
 139  *
 140  * Revision 1.4  1994/07/07  19:52:59  matt
 141  * Made joy_init() return success/fail flag
 142  * Made joy_init() properly detect a stick if one is plugged in after joy_init()
 143  * was called the first time.
 144  *
 145  * Revision 1.3  1994/07/01  10:55:55  john
 146  * Fixed some bugs... added support for 4 axis.
 147  *
 148  * Revision 1.2  1994/06/30  20:36:55  john
 149  * Revamped joystick code.
 150  *
 151  * Revision 1.1  1994/06/30  15:42:15  john
 152  * Initial revision
 153  *
 154  *
 155  */
 156
 157
 158 #ifdef RCS
 159 static char rcsid[] = "$Id: joyc.c,v 1.1.1.1 2001-01-19 03:30:15 bradleyb Exp $";
 160 #endif
 161
 162 #include <stdlib.h>
 163 #include <stdio.h>
 164 #include <conio.h>
 165 #include <dos.h>
 166 #include <i86.h>
 167
 168 //#define ARCADE 1
 169
 170 #include "types.h"
 171 #include "mono.h"
 172 #include "joy.h"
 173 #include "u_dpmi.h"
 174 #include "timer.h"
 175
 176 #include "args.h"
 177
 178 extern int joy_bogus_reading;
 179 int JOY_PORT = 513; //201h;
 180 int joy_deadzone = 0;
 181
 182 int joy_read_stick_asm2( int read_masks, int * event_buffer, int timeout );
 183 int joy_read_stick_friendly2( int read_masks, int * event_buffer, int timeout );
 184 int joy_read_stick_polled2( int read_masks, int * event_buffer, int timeout );
 185 int joy_read_stick_bios2( int read_masks, int * event_buffer, int timeout );
 186 int joy_read_buttons_bios2();
 187 void joy_read_buttons_bios_end2();
 188
 189
 190 //In key.c
 191 // ebx = read mask
 192 // edi = pointer to buffer
 193 // returns number of events
 194
 195 char joy_installed = 0;
 196 char joy_present = 0;
 197
 198 typedef struct Button_info {
 199         ubyte           ignore;
 200         ubyte           state;
 201         ubyte           last_state;
 202         int             timedown;
 203         ubyte           downcount;
 204         ubyte           upcount;
 205 } Button_info;
 206
 207 typedef struct Joy_info {
 208         ubyte                   present_mask;
 209         ubyte                   slow_read;
 210         int                     max_timer;
 211         int                     read_count;
 212         ubyte                   last_value;
 213         Button_info     buttons[MAX_BUTTONS];
 214         int                     axis_min[4];
 215         int                     axis_center[4];
 216         int                     axis_max[4];
 217 } Joy_info;
 218
 219 Joy_info joystick;
 220
 221 ubyte joy_read_buttons()
 222 {
 223  return ((~(inp(JOY_PORT) >> 4))&0xf);
 224 }
 225
 226 void joy_get_cal_vals(int *axis_min, int *axis_center, int *axis_max)
 227 {
 228         int i;
 229
 230         for (i=0; i<4; i++)             {
 231                 axis_min[i] = joystick.axis_min[i];
 232                 axis_center[i] = joystick.axis_center[i];
 233                 axis_max[i] = joystick.axis_max[i];
 234         }
 235 }
 236
 237 void joy_set_cal_vals(int *axis_min, int *axis_center, int *axis_max)
 238 {
 239         int i;
 240
 241         for (i=0; i<4; i++)             {
 242                 joystick.axis_min[i] = axis_min[i];
 243                 joystick.axis_center[i] = axis_center[i];
 244                 joystick.axis_max[i] = axis_max[i];
 245         }
 246 }
 247
 248
 249 ubyte joy_get_present_mask()    {
 250         return joystick.present_mask;
 251 }
 252
 253 void joy_set_timer_rate(int max_value ) {
 254         _disable();
 255         joystick.max_timer = max_value;
 256         _enable();
 257 }
 258
 259 int joy_get_timer_rate()        {
 260         return joystick.max_timer;
 261 }
 262
 263
 264 void joy_flush()        {
 265         int i;
 266
 267         if (!joy_installed) return;
 268
 269         _disable();
 270         for (i=0; i<MAX_BUTTONS; i++ )  {
 271                 joystick.buttons[i].ignore = 0;
 272                 joystick.buttons[i].state = 0;
 273                 joystick.buttons[i].timedown = 0;
 274                 joystick.buttons[i].downcount = 0;
 275                 joystick.buttons[i].upcount = 0;
 276         }
 277         _enable();
 278
 279 }
 280
 281 #pragma off (check_stack)
 282
 283 void joy_handler(int ticks_this_time)   {
 284         ubyte value;
 285         int i, state;
 286         Button_info * button;
 287
 288 //      joystick.max_timer = ticks_this_time;
 289
 290         if ( joystick.slow_read & JOY_BIOS_READINGS )           {
 291                 joystick.read_count++;
 292                 if ( joystick.read_count > 7 )  {
 293                         joystick.read_count = 0;
 294                         value = joy_read_buttons_bios2();
 295                         joystick.last_value = value;
 296                 } else {
 297                         value = joystick.last_value;
 298                 }
 299         } else {
 300                 value = joy_read_buttons(); //JOY_READ_BUTTONS;
 301         }
 302
 303         for (i=0; i<MAX_BUTTONS; i++ )  {
 304                 button = &joystick.buttons[i];
 305                 if (!button->ignore) {
 306                         if ( i < 5 )
 307                                 state = (value >> i) & 1;
 308                         else if (i==(value+4))
 309                                 state = 1;
 310                         else
 311                                 state = 0;
 312
 313                         if ( button->last_state == state )      {
 314                                 if (state) button->timedown += ticks_this_time;
 315                         } else {
 316                                 if (state)      {
 317                                         button->downcount += state;
 318                                         button->state = 1;
 319                                 } else {
 320                                         button->upcount += button->state;
 321                                         button->state = 0;
 322                                 }
 323                                 button->last_state = state;
 324                         }
 325                 }
 326         }
 327 }
 328
 329 void joy_handler_end()  {               // Dummy function to help calculate size of joystick handler function
 330 }
 331
 332 #pragma off (check_stack)
 333
 334 ubyte joy_read_raw_buttons()    {
 335         if ( joystick.slow_read & JOY_BIOS_READINGS )
 336                 return joy_read_buttons_bios2();
 337         else
 338                 return joy_read_buttons(); //JOY_READ_BUTTONS;
 339 }
 340
 341 void joy_set_slow_reading(int flag)
 342 {
 343         joystick.slow_read |= flag;
 344         joy_set_cen();
 345 }
 346
 347 ubyte joystick_read_raw_axis( ubyte mask, int * axis )
 348 {
 349         ubyte read_masks, org_masks;
 350         int t, t1, t2, buffer[4*2+2];
 351         int e, i, num_channels, c;
 352
 353         axis[0] = 0; axis[1] = 0;
 354         axis[2] = 0; axis[3] = 0;
 355
 356         if (!joy_installed) return 0;
 357
 358         read_masks = 0;
 359         org_masks = mask;
 360
 361         mask &= joystick.present_mask;                  // Don't read non-present channels
 362         if ( mask==0 )  {
 363                 return 0;               // Don't read if no stick connected.
 364         }
 365
 366         if ( joystick.slow_read & JOY_SLOW_READINGS )   {
 367                 for (c=0; c<4; c++ )    {
 368                         if ( mask & (1 << c))   {
 369                                 // Time out at  (1/100th of a second)
 370
 371                                 if ( joystick.slow_read & JOY_POLLED_READINGS )
 372                                         num_channels = joy_read_stick_polled2( (1 << c), buffer, 65536 );
 373                                 else if ( joystick.slow_read & JOY_BIOS_READINGS )
 374                                         num_channels = joy_read_stick_bios2( (1 << c), buffer, 65536 );
 375                                 else if ( joystick.slow_read & JOY_FRIENDLY_READINGS )
 376                                         num_channels = joy_read_stick_friendly2( (1 << c), buffer, (1193180/100) );
 377                                 else
 378                                         num_channels = joy_read_stick_asm2( (1 << c), buffer, (1193180/100) );
 379
 380                                 if ( num_channels > 0 ) {
 381                                         t1 = buffer[0];
 382                                         e = buffer[1];
 383                                         t2 = buffer[2];
 384                                         if ( joystick.slow_read & (JOY_POLLED_READINGS|JOY_BIOS_READINGS) )     {
 385                                                 t = t2 - t1;
 386                                         } else {
 387                                                 if ( t1 > t2 )
 388                                                         t = t1 - t2;
 389                                                 else                            {
 390                                                         t = t1 + joystick.max_timer - t2;
 391                                                         //mprintf( 0, "%d, %d, %d, %d\n", t1, t2, joystick.max_timer, t );
 392                                                 }
 393                                         }
 394
 395                                         if ( e & 1 ) { axis[0] = t; read_masks |= 1; }
 396                                         if ( e & 2 ) { axis[1] = t; read_masks |= 2; }
 397                                         if ( e & 4 ) { axis[2] = t; read_masks |= 4; }
 398                                         if ( e & 8 ) { axis[3] = t; read_masks |= 8; }
 399                                 }
 400                         }
 401                 }
 402         } else {
 403                 // Time out at  (1/100th of a second)
 404                 if ( joystick.slow_read & JOY_POLLED_READINGS )
 405                         num_channels = joy_read_stick_polled2( mask, buffer, 65536 );
 406                 else if ( joystick.slow_read & JOY_BIOS_READINGS )
 407                         num_channels = joy_read_stick_bios2( mask, buffer, 65536 );
 408                 else if ( joystick.slow_read & JOY_FRIENDLY_READINGS )
 409                         num_channels = joy_read_stick_friendly2( mask, buffer, (1193180/100) );
 410                 else
 411                         num_channels = joy_read_stick_asm2( mask, buffer, (1193180/100) );
 412                 //mprintf(( 0, "(%d)\n", num_channels ));
 413
 414                 for (i=0; i<num_channels; i++ ) {
 415                         t1 = buffer[0];
 416                         t2 = buffer[i*2+2];
 417
 418                         if ( joystick.slow_read & (JOY_POLLED_READINGS|JOY_BIOS_READINGS) )     {
 419                                 t = t2 - t1;
 420                         } else {
 421                                 if ( t1 > t2 )
 422                                         t = t1 - t2;
 423                                 else                            {
 424                                         t = t1 + joystick.max_timer - t2;
 425                                         //mprintf(( 0, "%d, %d, %d, %d\n", t1, t2, joystick.max_timer, t ));
 426                                 }
 427                         }
 428                         e = buffer[i*2+1];
 429
 430                         if ( e & 1 ) { axis[0] = t; read_masks |= 1; }
 431                         if ( e & 2 ) { axis[1] = t; read_masks |= 2; }
 432                         if ( e & 4 ) { axis[2] = t; read_masks |= 4; }
 433                         if ( e & 8 ) { axis[3] = t; read_masks |= 8; }
 434                 }
 435
 436         }
 437
 438         return read_masks;
 439 }
 440
 441 #ifdef __GNUC__
 442 #define near
 443 #endif
 444
 445 int joy_init()
 446 {
 447         int i;
 448         int temp_axis[4];
 449
 450 //        if(FindArg("-joy209"))
 451 //         use_alt_joyport=1;
 452         if(FindArg("-joy209"))
 453          JOY_PORT = 521;  //209h;
 454
 455         joy_flush();
 456
 457         _disable();
 458         for (i=0; i<MAX_BUTTONS; i++ )
 459                 joystick.buttons[i].last_state = 0;
 460         _enable();
 461
 462         if ( !joy_installed )   {
 463                 joy_present = 0;
 464                 joy_installed = 1;
 465                 //joystick.max_timer = 65536;
 466                 joystick.slow_read = 0;
 467                 joystick.read_count = 0;
 468                 joystick.last_value = 0;
 469
 470                 //--------------- lock everything for the virtal memory ----------------------------------
 471                 if (!dpmi_lock_region ((void near *)joy_read_buttons_bios2, (char *)joy_read_buttons_bios_end2 - (char near *)joy_read_buttons_bios2))   {
 472                         printf( "Error locking joystick handler (read bios)!\n" );
 473                         exit(1);
 474                 }
 475
 476
 477
 478                 if (!dpmi_lock_region ((void near *)joy_handler, (char *)joy_handler_end - (char near *)joy_handler))   {
 479                         printf( "Error locking joystick handler!\n" );
 480                         exit(1);
 481                 }
 482
 483                 if (!dpmi_lock_region (&joystick, sizeof(Joy_info)))    {
 484                         printf( "Error locking joystick handler's data!\n" );
 485                         exit(1);
 486                 }
 487
 488                 timer_set_joyhandler(joy_handler);
 489         }
 490
 491         // Do initial cheapy calibration...
 492         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 493         do      {
 494                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, temp_axis );
 495         } while( joy_bogus_reading );
 496
 497         if ( joystick.present_mask & 3 )
 498                 joy_present = 1;
 499         else
 500                 joy_present = 0;
 501
 502         return joy_present;
 503 }
 504
 505 void joy_close()
 506 {
 507         if (!joy_installed) return;
 508         joy_installed = 0;
 509 }
 510
 511 void joy_set_ul()
 512 {
 513         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 514         do      {
 515                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, joystick.axis_min );
 516         } while( joy_bogus_reading );
 517         if ( joystick.present_mask & 3 )
 518                 joy_present = 1;
 519         else
 520                 joy_present = 0;
 521 }
 522
 523 void joy_set_lr()
 524 {
 525         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 526         do {
 527                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, joystick.axis_max );
 528         } while( joy_bogus_reading );
 529
 530         if ( joystick.present_mask & 3 )
 531                 joy_present = 1;
 532         else
 533                 joy_present = 0;
 534 }
 535
 536 void joy_set_cen()
 537 {
 538         joystick.present_mask = JOY_ALL_AXIS;           // Assume they're all present
 539         do {
 540                 joystick.present_mask = joystick_read_raw_axis( JOY_ALL_AXIS, joystick.axis_center );
 541         } while( joy_bogus_reading );
 542
 543         if ( joystick.present_mask & 3 )
 544                 joy_present = 1;
 545         else
 546                 joy_present = 0;
 547 }
 548
 549 void joy_set_cen_fake(int channel)
 550 {
 551
 552         int i,n=0;
 553         int minx, maxx, cenx;
 554
 555         minx=maxx=cenx=0;
 556
 557         for (i=0; i<4; i++ )    {
 558                 if ( (joystick.present_mask & (1<<i)) && (i!=channel) ) {
 559                         n++;
 560                         minx += joystick.axis_min[i];
 561                         maxx += joystick.axis_max[i];
 562                         cenx += joystick.axis_center[i];
 563                 }
 564         }
 565         minx /= n;
 566         maxx /= n;
 567         cenx /= n;
 568
 569         joystick.axis_min[channel] = minx;
 570         joystick.axis_max[channel] = maxx;
 571         joystick.axis_center[channel] = cenx;
 572 }
 573
 574 int joy_get_scaled_reading( int raw, int axn )
 575 {
 576  int x, d, dz;
 577
 578  // Make sure it's calibrated properly.
 579 //added/changed on 8/14/98 to allow smaller calibrating sticks to work (by Eivind Brendryen)--was <5
 580    if ( joystick.axis_center[axn] - joystick.axis_min[axn] < 2 )
 581     return 0;
 582    if ( joystick.axis_max[axn] - joystick.axis_center[axn] < 2 )
 583     return 0;
 584 //end change - Victor Rachels  (by Eivind Brendryen)
 585
 586   raw -= joystick.axis_center[axn];
 587
 588    if ( raw < 0 )
 589     d = joystick.axis_center[axn]-joystick.axis_min[axn];
 590    else
 591     d = joystick.axis_max[axn]-joystick.axis_center[axn];
 592
 593
 594    if ( d )
 595     x = (raw << 7) / d;
 596    else
 597     x = 0;
 598
 599
 600    if ( x < -128 )
 601     x = -128;
 602    if ( x > 127 )
 603     x = 127;
 604
 605 //added on 4/13/99 by Victor Rachels to add deadzone control
 606   dz =  (joy_deadzone) * 6;
 607    if ((x > (-1*dz)) && (x < dz))
 608     x = 0;
 609 //end this section addition -VR
 610
 611   return x;
 612 }
 613
 614 int last_reading[4] = { 0, 0, 0, 0 };
 615
 616 void joy_get_pos( int *x, int *y )
 617 {
 618         ubyte flags;
 619         int axis[4];
 620
 621         if ((!joy_installed)||(!joy_present)) { *x=*y=0; return; }
 622
 623         flags=joystick_read_raw_axis( JOY_1_X_AXIS+JOY_1_Y_AXIS, axis );
 624
 625         if ( joy_bogus_reading )        {
 626                 axis[0] = last_reading[0];
 627                 axis[1] = last_reading[1];
 628                 flags = JOY_1_X_AXIS+JOY_1_Y_AXIS;
 629         } else {
 630                 last_reading[0] = axis[0];
 631                 last_reading[1] = axis[1];
 632         }
 633
 634         if ( flags & JOY_1_X_AXIS )
 635                 *x = joy_get_scaled_reading( axis[0], 0 );
 636         else
 637                 *x = 0;
 638
 639         if ( flags & JOY_1_Y_AXIS )
 640                 *y = joy_get_scaled_reading( axis[1], 1 );
 641         else
 642                 *y = 0;
 643 }
 644
 645 ubyte joy_read_stick( ubyte masks, int *axis )
 646 {
 647         ubyte flags;
 648         int raw_axis[4];
 649
 650         if ((!joy_installed)||(!joy_present)) {
 651                 axis[0] = 0; axis[1] = 0;
 652                 axis[2] = 0; axis[3] = 0;
 653                 return 0;
 654         }
 655
 656         flags=joystick_read_raw_axis( masks, raw_axis );
 657
 658         if ( joy_bogus_reading )        {
 659                 axis[0] = last_reading[0];
 660                 axis[1] = last_reading[1];
 661                 axis[2] = last_reading[2];
 662                 axis[3] = last_reading[3];
 663                 flags = masks;
 664         } else {
 665                 last_reading[0] = axis[0];
 666                 last_reading[1] = axis[1];
 667                 last_reading[2] = axis[2];
 668                 last_reading[3] = axis[3];
 669         }
 670
 671         if ( flags & JOY_1_X_AXIS )
 672                 axis[0] = joy_get_scaled_reading( raw_axis[0], 0 );
 673         else
 674                 axis[0] = 0;
 675
 676         if ( flags & JOY_1_Y_AXIS )
 677                 axis[1] = joy_get_scaled_reading( raw_axis[1], 1 );
 678         else
 679                 axis[1] = 0;
 680
 681         if ( flags & JOY_2_X_AXIS )
 682                 axis[2] = joy_get_scaled_reading( raw_axis[2], 2 );
 683         else
 684                 axis[2] = 0;
 685
 686         if ( flags & JOY_2_Y_AXIS )
 687                 axis[3] = joy_get_scaled_reading( raw_axis[3], 3 );
 688         else
 689                 axis[3] = 0;
 690
 691         return flags;
 692 }
 693
 694
 695 int joy_get_btns()
 696 {
 697         if ((!joy_installed)||(!joy_present)) return 0;
 698
 699         return joy_read_raw_buttons();
 700 }
 701
 702 void joy_get_btn_down_cnt( int *btn0, int *btn1 )
 703 {
 704         if ((!joy_installed)||(!joy_present)) { *btn0=*btn1=0; return; }
 705
 706         _disable();
 707         *btn0 = joystick.buttons[0].downcount;
 708         joystick.buttons[0].downcount = 0;
 709         *btn1 = joystick.buttons[1].downcount;
 710         joystick.buttons[1].downcount = 0;
 711         _enable();
 712 }
 713
 714 int joy_get_button_state( int btn )
 715 {
 716         int count;
 717
 718         if ((!joy_installed)||(!joy_present)) return 0;
 719
 720         if ( btn >= MAX_BUTTONS ) return 0;
 721
 722         _disable();
 723         count = joystick.buttons[btn].state;
 724         _enable();
 725
 726         return  count;
 727 }
 728
 729 int joy_get_button_up_cnt( int btn )
 730 {
 731         int count;
 732
 733         if ((!joy_installed)||(!joy_present)) return 0;
 734
 735         if ( btn >= MAX_BUTTONS ) return 0;
 736
 737         _disable();
 738         count = joystick.buttons[btn].upcount;
 739         joystick.buttons[btn].upcount = 0;
 740         _enable();
 741
 742         return count;
 743 }
 744
 745 int joy_get_button_down_cnt( int btn )
 746 {
 747         int count;
 748
 749         if ((!joy_installed)||(!joy_present)) return 0;
 750         if ( btn >= MAX_BUTTONS ) return 0;
 751
 752         _disable();
 753         count = joystick.buttons[btn].downcount;
 754         joystick.buttons[btn].downcount = 0;
 755         _enable();
 756
 757         return count;
 758 }
 759
 760
 761 fix joy_get_button_down_time( int btn )
 762 {
 763         fix count;
 764
 765         if ((!joy_installed)||(!joy_present)) return 0;
 766         if ( btn >= MAX_BUTTONS ) return 0;
 767
 768         _disable();
 769         count = joystick.buttons[btn].timedown;
 770         joystick.buttons[btn].timedown = 0;
 771         _enable();
 772
 773         return fixmuldiv(count, 65536, 1193180 );
 774 }
 775
 776 void joy_get_btn_up_cnt( int *btn0, int *btn1 )
 777 {
 778         if ((!joy_installed)||(!joy_present)) { *btn0=*btn1=0; return; }
 779
 780         _disable();
 781         *btn0 = joystick.buttons[0].upcount;
 782         joystick.buttons[0].upcount = 0;
 783         *btn1 = joystick.buttons[1].upcount;
 784         joystick.buttons[1].upcount = 0;
 785         _enable();
 786 }
 787
 788 void joy_set_btn_values( int btn, int state, fix timedown, int downcount, int upcount )
 789 {
 790         _disable();
 791         joystick.buttons[btn].ignore = 1;
 792         joystick.buttons[btn].state = state;
 793         joystick.buttons[btn].timedown = fixmuldiv( timedown, 1193180, 65536 );
 794         joystick.buttons[btn].downcount = downcount;
 795         joystick.buttons[btn].upcount = upcount;
 796         _enable();
 797 }
 798
 799 void joy_poll()
 800 {
 801         if ( joystick.slow_read & JOY_BIOS_READINGS )
 802                 joystick.last_value = joy_read_buttons_bios2();
 803 }