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.
14 * $Source: /cvs/cvsroot/d2x/arch/dos/key.c,v $
15 * $Revision: 1.1.1.2 $
17 * $Date: 2001-01-19 03:33:52 $
19 * Functions for keyboard handler.
21 * $Log: not supported by cvs2svn $
22 * Revision 1.1.1.1 1999/06/14 21:58:32 donut
23 * Import of d1x 1.37 source.
25 * Revision 1.35 1995/01/25 20:13:30 john
26 * Took out not passing keys to debugger if w10.
28 * Revision 1.34 1995/01/14 19:19:31 john
29 * Made so when you press Shift+Baskspace, it release keys autmatically.
31 * Revision 1.33 1994/12/13 09:21:48 john
32 * Took out keyd_editor_mode, and KEY_DEBUGGED stuff for NDEBUG versions.
34 * Revision 1.32 1994/11/12 13:52:01 john
35 * Fixed bug with code that cleared bios buffer.
37 * Revision 1.31 1994/10/24 15:16:16 john
38 * Added code to detect KEY_PAUSE.
40 * Revision 1.30 1994/10/24 13:57:53 john
41 * Hacked in support for pause key onto code 0x61.
43 * Revision 1.29 1994/10/21 15:18:13 john
44 * *** empty log message ***
46 * Revision 1.28 1994/10/21 15:17:24 john
47 * Made LSHIFT+BACKSPACE do what PrtScr used to.
49 * Revision 1.27 1994/09/22 16:09:18 john
50 * Fixed some virtual memory lockdown problems with timer and
53 * Revision 1.26 1994/09/15 21:32:47 john
54 * Added bounds checking for down_count scancode
57 * Revision 1.25 1994/08/31 12:22:20 john
60 * Revision 1.24 1994/08/24 18:53:48 john
61 * Made Cyberman read like normal mouse; added dpmi module; moved
62 * mouse from assembly to c. Made mouse buttons return time_down.
64 * Revision 1.23 1994/08/18 15:17:51 john
65 * *** empty log message ***
67 * Revision 1.22 1994/08/18 15:16:38 john
68 * fixed some bugs with clear_key_times and then
69 * removed it because i fixed key_flush to do the
72 * Revision 1.21 1994/08/17 19:01:25 john
73 * Attempted to fix a bug with a key being held down
74 * key_flush called, then the key released having too
77 * Revision 1.20 1994/08/08 10:43:48 john
78 * Recorded when a key was pressed for key_inkey_time.
80 * Revision 1.19 1994/06/22 15:00:03 john
81 * Made keyboard close automatically on exit.
83 * Revision 1.18 1994/06/21 09:16:29 john
84 * *** empty log message ***
86 * Revision 1.17 1994/06/21 09:08:23 john
87 * *** empty log message ***
89 * Revision 1.16 1994/06/21 09:05:01 john
90 * *** empty log message ***
92 * Revision 1.15 1994/06/21 09:04:24 john
93 * Made PrtScreen do an int5
95 * Revision 1.14 1994/06/17 17:17:06 john
96 * Added keyd_time_last_key_was_pressed or something like that.
98 * Revision 1.13 1994/05/14 13:55:16 matt
99 * Added #define to control key passing to bios
101 * Revision 1.12 1994/05/05 18:09:39 john
102 * Took out BIOS to prevent stuck keys.
104 * Revision 1.11 1994/05/03 17:39:12 john
105 * *** empty log message ***
107 * Revision 1.10 1994/04/29 12:14:20 john
108 * Locked all memory used during interrupts so that program
109 * won't hang when using virtual memory.
111 * Revision 1.9 1994/04/28 23:49:41 john
112 * Made key_flush flush more keys and also did something else but i forget what.
114 * Revision 1.8 1994/04/22 12:52:12 john
115 * *** empty log message ***
117 * Revision 1.7 1994/04/01 10:44:59 mike
118 * Change key_getch() to call getch() if our interrupt hasn't been installed.
120 * Revision 1.6 1994/03/09 10:45:48 john
121 * Neatend code a bit.
123 * Revision 1.5 1994/02/17 17:24:16 john
126 * Revision 1.4 1994/02/17 16:30:29 john
127 * Put in code to pass keys when in debugger.
129 * Revision 1.3 1994/02/17 15:57:59 john
130 * Made handler not chain to BIOS handler.
132 * Revision 1.2 1994/02/17 15:56:06 john
135 * Revision 1.1 1994/02/17 15:54:07 john
141 //#define PASS_KEYS_TO_BIOS 1 //if set, bios gets keys
155 _go32_dpmi_seginfo kbd_hand_info;
162 #define KEY_BUFFER_SIZE 16
165 //-------- Variable accessed by outside functions ---------
166 unsigned char keyd_buffer_type; // 0=No buffer, 1=buffer ASCII, 2=buffer scans
167 unsigned char keyd_repeat;
168 unsigned char keyd_editor_mode;
169 volatile unsigned char keyd_last_pressed;
170 volatile unsigned char keyd_last_released;
171 volatile unsigned char keyd_pressed[256];
172 volatile int keyd_time_when_last_pressed;
174 typedef struct keyboard {
175 unsigned short keybuffer[KEY_BUFFER_SIZE];
176 fix time_pressed[KEY_BUFFER_SIZE];
177 fix TimeKeyWentDown[256];
178 fix TimeKeyHeldDown[256];
179 unsigned int NumDowns[256];
180 unsigned int NumUps[256];
181 unsigned int keyhead, keytail;
182 unsigned char E0Flag;
183 unsigned char E1Flag;
186 _go32_dpmi_seginfo prev_int_9;
188 void (__interrupt __far *prev_int_9)();
192 static volatile keyboard key_data;
194 static unsigned char Installed=0;
196 unsigned char ascii_table[128] =
197 { 255, 255, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',255,255,
198 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', 255, 255,
199 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', 39, '`',
200 255, '\\', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', 255,'*',
201 255, ' ', 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,255,255,
202 255, 255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
203 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
204 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
205 255,255,255,255,255,255,255,255 };
207 unsigned char shifted_ascii_table[128] =
208 { 255, 255, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',255,255,
209 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', 255, 255,
210 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',
211 255, '|', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?', 255,255,
212 255, ' ', 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,255,255,
213 255, 255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
214 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
215 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
216 255,255,255,255,255,255,255,255 };
218 char * key_text[256] = {
219 "","ESC","1","2","3","4","5","6","7","8","9","0","-",
220 "=","BSPC","TAB","Q","W","E","R","T","Y","U","I","O",
221 "P","[","]","
\83","LCTRL","A","S","D","F",
222 "G","H","J","K","L",";","'","`",
223 "LSHFT","\\","Z","X","C","V","B","N","M",",",
224 ".","/","RSHFT","PAD*","LALT","SPC",
225 "CPSLK","F1","F2","F3","F4","F5","F6","F7","F8","F9",
226 "F10","NMLCK","SCLK","PAD7","PAD8","PAD9","PAD-",
227 "PAD4","PAD5","PAD6","PAD+","PAD1","PAD2","PAD3","PAD0",
228 "PAD.","","","","F11","F12","","","","","","","","","",
229 "","","","","","","","","","","","","","","","","","","","",
230 "","","","","","","","","","","","","","","","","","","","",
231 "","","","","","","","","","","","","","","","","","",
232 "PAD
\83","RCTRL","","","","","","","","","","","","","",
233 "","","","","","","","","","","PAD/","","","RALT","",
234 "","","","","","","","","","","","","","HOME","
\82","PGUP",
235 "","
\81","","
\7f","","END","
\80","PGDN","INS",
236 "DEL","","","","","","","","","","","","","","","","","",
237 "","","","","","","","","","","","","","","","","","","","",
238 "","","","","","","" };
240 unsigned char key_to_ascii(int keycode )
244 shifted = keycode & KEY_SHIFTED;
251 return shifted_ascii_table[keycode];
253 return ascii_table[keycode];
256 void key_clear_bios_buffer_all()
259 // Clear keyboard buffer...
260 *(ushort *)0x41a=*(ushort *)0x41c;
261 // Clear the status bits...
265 _farpokew(_dos_ds,0x41a, _farpeekw(_dos_ds, 0x41c));
266 _farpokeb(_dos_ds,0x417, 0);
267 _farpokeb(_dos_ds,0x418, 0);
271 void key_clear_bios_buffer()
274 // Clear keyboard buffer...
275 *(ushort *)0x41a=*(ushort *)0x41c;
277 _farpokew(_dos_ds,0x41a, _farpeekw(_dos_ds, 0x41c));
288 // Clear the BIOS buffer
289 key_clear_bios_buffer();
291 key_data.keyhead = key_data.keytail = 0;
293 //Clear the keyboard buffer
294 for (i=0; i<KEY_BUFFER_SIZE; i++ ) {
295 key_data.keybuffer[i] = 0;
296 key_data.time_pressed[i] = 0;
299 //Clear the keyboard array
301 CurTime =timer_get_fixed_secondsX();
303 for (i=0; i<256; i++ ) {
305 key_data.TimeKeyWentDown[i] = CurTime;
306 key_data.TimeKeyHeldDown[i] = 0;
307 key_data.NumDowns[i]=0;
308 key_data.NumUps[i]=0;
316 if ( n >= KEY_BUFFER_SIZE ) n=0;
320 // Returns 1 if character waiting... 0 otherwise
323 int is_one_waiting = 0;
327 key_clear_bios_buffer();
329 if (key_data.keytail!=key_data.keyhead)
332 return is_one_waiting;
341 key_clear_bios_buffer();
343 if (key_data.keytail!=key_data.keyhead) {
344 key = key_data.keybuffer[key_data.keyhead];
345 key_data.keyhead = add_one(key_data.keyhead);
351 int key_inkey_time(fix * time)
357 key_clear_bios_buffer();
359 if (key_data.keytail!=key_data.keyhead) {
360 key = key_data.keybuffer[key_data.keyhead];
361 *time = key_data.time_pressed[key_data.keyhead];
362 key_data.keyhead = add_one(key_data.keyhead);
376 key_clear_bios_buffer();
378 if (key_data.keytail!=key_data.keyhead) {
379 key = key_data.keybuffer[key_data.keyhead];
385 // If not installed, uses BIOS and returns getch();
386 // Else returns pending key (or waits for one if none waiting).
394 while (!key_checkch())
399 unsigned int key_get_shift_status()
401 unsigned int shift_status = 0;
405 key_clear_bios_buffer();
407 if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT] )
408 shift_status |= KEY_SHIFTED;
410 if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT] )
411 shift_status |= KEY_ALTED;
413 if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL] )
414 shift_status |= KEY_CTRLED;
417 if (keyd_pressed[KEY_DELETE])
418 shift_status |=KEY_DEBUGGED;
426 // Returns the number of seconds this key has been down since last call.
427 fix key_down_time(int scancode) {
430 if ((scancode<0)|| (scancode>255)) return 0;
433 if (keyd_editor_mode && key_get_shift_status() )
439 if ( !keyd_pressed[scancode] ) {
440 time_down = key_data.TimeKeyHeldDown[scancode];
441 key_data.TimeKeyHeldDown[scancode] = 0;
443 time = timer_get_fixed_secondsX();
444 time_down = time - key_data.TimeKeyWentDown[scancode];
445 key_data.TimeKeyWentDown[scancode] = time;
452 // Returns number of times key has went from up to down since last call.
453 unsigned int key_down_count(int scancode) {
456 if ((scancode<0)|| (scancode>255)) return 0;
459 n = key_data.NumDowns[scancode];
460 key_data.NumDowns[scancode] = 0;
467 // Returns number of times key has went from down to up since last call.
468 unsigned int key_up_count(int scancode) {
471 if ((scancode<0)|| (scancode>255)) return 0;
474 n = key_data.NumUps[scancode];
475 key_data.NumUps[scancode] = 0;
481 // Use intrinsic forms so that we stay in the locked interrup code.
485 #pragma aux Int5 = "int 5";
488 #define Int5() asm volatile("int $5")
492 #pragma off (check_stack)
493 void __interrupt __far key_handler()
495 unsigned char scancode, breakbit, temp;
496 unsigned short keycode;
500 #ifdef __WATCOMC__ /* must have _chain_intr */
501 ubyte * MONO = (ubyte *)(0x0b0000+24*80*2);
502 if ( ((MONO[0]=='D') && (MONO[2]=='B') && (MONO[4]=='G') && (MONO[6]=='>')) ||
503 ((MONO[14]=='<') && (MONO[16]=='i') && (MONO[18]=='>') && (MONO[20]==' ') && (MONO[22]=='-')) ||
504 ((MONO[0]==200 ) && (MONO[2]==27) && (MONO[4]==17) )
506 _chain_intr( key_data.prev_int_9 );
512 scancode = inp( 0x60 );
516 key_data.E0Flag = 0x80;
519 // Parse scancode and break bit
520 if (key_data.E1Flag > 0 ) { // Special code for Pause, which is E1 1D 45 E1 9D C5
522 if ( scancode == 0x1D ) {
523 scancode = KEY_PAUSE;
525 } else if ( scancode == 0x9d ) {
526 scancode = KEY_PAUSE;
529 break; // skip this keycode
531 } else if ( scancode==0xE1 ) {
535 breakbit = scancode & 0x80; // Get make/break bit
536 scancode &= 0x7f; // Strip make/break bit off of scancode
537 scancode |= key_data.E0Flag; // Add in extended key code
539 key_data.E0Flag = 0; // Clear extended key code
543 keyd_last_released = scancode;
544 keyd_pressed[scancode] = 0;
545 key_data.NumUps[scancode]++;
547 temp |= keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT];
548 temp |= keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT];
549 temp |= keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL];
551 temp |= keyd_pressed[KEY_DELETE];
552 if ( !(keyd_editor_mode && temp) )
553 #endif // NOTICE LINK TO ABOVE IF!!!!
554 key_data.TimeKeyHeldDown[scancode] += timer_get_fixed_secondsX() - key_data.TimeKeyWentDown[scancode];
557 keyd_last_pressed = scancode;
558 keyd_time_when_last_pressed = timer_get_fixed_secondsX();
559 if (!keyd_pressed[scancode]) {
561 key_data.TimeKeyWentDown[scancode] = timer_get_fixed_secondsX();
562 keyd_pressed[scancode] = 1;
563 key_data.NumDowns[scancode]++;
565 if ( (keyd_pressed[KEY_LSHIFT]) && (scancode == KEY_BACKSP) ) {
566 keyd_pressed[KEY_LSHIFT] = 0;
570 } else if (!keyd_repeat) {
571 // Don't buffer repeating key if repeat mode is off
575 if ( scancode!=0xAA ) {
578 if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT] )
579 keycode |= KEY_SHIFTED;
581 if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT] )
582 keycode |= KEY_ALTED;
584 if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL] )
585 keycode |= KEY_CTRLED;
588 if ( keyd_pressed[KEY_DELETE] )
589 keycode |= KEY_DEBUGGED;
592 temp = key_data.keytail+1;
593 if ( temp >= KEY_BUFFER_SIZE ) temp=0;
595 if (temp!=key_data.keyhead) {
596 key_data.keybuffer[key_data.keytail] = keycode;
597 key_data.time_pressed[key_data.keytail] = keyd_time_when_last_pressed;
598 key_data.keytail = temp;
605 #ifdef PASS_KEYS_TO_BIOS
606 _chain_intr( key_data.prev_int_9 );
610 temp = inp(0x61); // Get current port 61h state
611 temp |= 0x80; // Turn on bit 7 to signal clear keybrd
612 outp( 0x61, temp ); // Send to port
613 temp &= 0x7f; // Turn off bit 7 to signal break
614 outp( 0x61, temp ); // Send to port
615 outp( 0x20, 0x20 ); // Reset interrupt controller
618 #pragma on (check_stack)
620 void key_handler_end() { // Dummy function to help calculate size of keyboard handler function
627 keyd_time_when_last_pressed = timer_get_fixed_seconds();
628 keyd_buffer_type = 1;
630 key_data.in_key_handler = 0;
634 // Clear the keyboard array
637 if (Installed) return;
640 //--------------- lock everything for the virtal memory ----------------------------------
641 if (!dpmi_lock_region ((void near *)key_handler, (char *)key_handler_end - (char near *)key_handler)) {
642 printf( "Error locking keyboard handler!\n" );
645 if (!dpmi_lock_region ((void *)&key_data, sizeof(keyboard))) {
646 printf( "Error locking keyboard handler's data1!\n" );
649 if (!dpmi_lock_region (&keyd_buffer_type, sizeof(char))) {
650 printf( "Error locking keyboard handler's data2!\n" );
653 if (!dpmi_lock_region (&keyd_repeat, sizeof(char))) {
654 printf( "Error locking keyboard handler's data3!\n" );
657 if (!dpmi_lock_region (&keyd_editor_mode, sizeof(char))) {
658 printf( "Error locking keyboard handler's data4!\n" );
661 if (!dpmi_lock_region ((void *)&keyd_last_pressed, sizeof(char))) {
662 printf( "Error locking keyboard handler's data5!\n" );
665 if (!dpmi_lock_region ((void *)&keyd_last_released, sizeof(char))) {
666 printf( "Error locking keyboard handler's data6!\n" );
669 if (!dpmi_lock_region ((void *)&keyd_pressed, sizeof(char)*256)) {
670 printf( "Error locking keyboard handler's data7!\n" );
673 if (!dpmi_lock_region ((void *)&keyd_time_when_last_pressed, sizeof(int))) {
674 printf( "Error locking keyboard handler's data8!\n" );
679 key_data.prev_int_9 = (void *)_dos_getvect( 9 );
680 _dos_setvect( 9, key_handler );
682 _go32_dpmi_get_protected_mode_interrupt_vector(9,
683 (_go32_dpmi_seginfo *)&key_data.prev_int_9);
684 kbd_hand_info.pm_offset = (int)key_handler;
685 kbd_hand_info.pm_selector = _my_cs();
686 _go32_dpmi_allocate_iret_wrapper(&kbd_hand_info);
687 _go32_dpmi_set_protected_mode_interrupt_vector(9, &kbd_hand_info);
695 if (!Installed) return;
699 _dos_setvect( 9, key_data.prev_int_9 );
701 _go32_dpmi_set_protected_mode_interrupt_vector(9,
702 (_go32_dpmi_seginfo *)&key_data.prev_int_9);
706 key_clear_bios_buffer_all();