1 // 16bit code to handle keyboard requests.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU GPLv3 license.
8 #include "biosvar.h" // struct bregs
9 #include "util.h" // debug_enter
10 #include "config.h" // CONFIG_*
13 enqueue_key(u8 scan_code, u8 ascii_code)
15 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
16 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
18 u16 buffer_head = GET_BDA(kbd_buf_head);
19 u16 buffer_tail = GET_BDA(kbd_buf_tail);
21 u16 temp_tail = buffer_tail;
23 if (buffer_tail >= buffer_end)
24 buffer_tail = buffer_start;
26 if (buffer_tail == buffer_head)
29 SET_FARVAR(0x0000, *(u8*)(temp_tail+0x400+0), ascii_code);
30 SET_FARVAR(0x0000, *(u8*)(temp_tail+0x400+1), scan_code);
31 SET_BDA(kbd_buf_tail, buffer_tail);
36 dequeue_key(u8 *scan_code, u8 *ascii_code, u8 incr)
41 buffer_head = GET_BDA(kbd_buf_head);
42 buffer_tail = GET_BDA(kbd_buf_tail);
44 if (buffer_head != buffer_tail)
51 *ascii_code = GET_FARVAR(0x0000, *(u8*)(buffer_head+0x400+0));
52 *scan_code = GET_FARVAR(0x0000, *(u8*)(buffer_head+0x400+1));
55 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
56 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
59 if (buffer_head >= buffer_end)
60 buffer_head = buffer_start;
61 SET_BDA(kbd_buf_head, buffer_head);
66 // read keyboard input
68 handle_1600(struct bregs *regs)
70 u8 scan_code, ascii_code;
71 dequeue_key(&scan_code, &ascii_code, 1);
72 if (scan_code != 0 && ascii_code == 0xF0)
74 else if (ascii_code == 0xE0)
76 regs->ax = (scan_code << 8) | ascii_code;
79 // check keyboard status
81 handle_1601(struct bregs *regs)
83 u8 scan_code, ascii_code;
84 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
88 if (scan_code != 0 && ascii_code == 0xF0)
90 else if (ascii_code == 0xE0)
92 regs->ax = (scan_code << 8) | ascii_code;
96 // get shift flag status
98 handle_1602(struct bregs *regs)
100 regs->al = GET_BDA(kbd_flag0);
103 // store key-stroke into buffer
105 handle_1605(struct bregs *regs)
107 regs->al = !enqueue_key(regs->ch, regs->cl);
110 // GET KEYBOARD FUNCTIONALITY
112 handle_1609(struct bregs *regs)
114 // bit Bochs Description
116 // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
117 // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
118 // 4 1 INT 16/AH=0Ah supported
119 // 3 0 INT 16/AX=0306h supported
120 // 2 0 INT 16/AX=0305h supported
121 // 1 0 INT 16/AX=0304h supported
122 // 0 0 INT 16/AX=0300h supported
129 handle_160a(struct bregs *regs)
131 outb(0xf2, PORT_PS2_DATA);
134 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
135 outb(0x00, PORT_DIAG);
138 if (inb(PORT_PS2_DATA) != 0xfa) {
146 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
147 outb(0x00, PORT_DIAG);
150 kbd_code |= (inb(PORT_PS2_DATA) << 8);
156 // read MF-II keyboard input
158 handle_1610(struct bregs *regs)
160 u8 scan_code, ascii_code;
161 dequeue_key(&scan_code, &ascii_code, 1);
162 if (scan_code != 0 && ascii_code == 0xF0)
164 regs->ax = (scan_code << 8) | ascii_code;
167 // check MF-II keyboard status
169 handle_1611(struct bregs *regs)
171 u8 scan_code, ascii_code;
172 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
176 if (scan_code != 0 && ascii_code == 0xF0)
178 regs->ax = (scan_code << 8) | ascii_code;
179 regs->flags &= ~F_ZF;
182 // get extended keyboard status
184 handle_1612(struct bregs *regs)
186 regs->al = GET_BDA(kbd_flag0);
187 regs->ah = (GET_BDA(kbd_flag1) & 0x73) | (GET_BDA(kbd_mode) & 0x0c);
188 //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
192 handle_166f(struct bregs *regs)
194 if (regs->al == 0x08)
195 // unsupported, aka normal keyboard
199 // keyboard capability check called by DOS 5.0+ keyb
201 handle_1692(struct bregs *regs)
203 // function int16 ah=0x10-0x12 supported
207 // 122 keys capability check called by DOS 5.0+ keyb
209 handle_16a2(struct bregs *regs)
211 // don't change AH : function int16 ah=0x20-0x22 NOT supported
217 u8 shift_flags = GET_BDA(kbd_flag0);
218 u8 led_flags = GET_BDA(kbd_led);
219 if (((shift_flags >> 4) & 0x07) ^ ((led_flags & 0x07) == 0))
222 outb(0xed, PORT_PS2_DATA);
223 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
224 outb(0x21, PORT_DIAG);
225 if (inb(PORT_PS2_DATA) == 0xfa) {
227 led_flags |= (shift_flags >> 4) & 0x07;
228 outb(led_flags & 0x07, PORT_PS2_DATA);
229 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
230 outb(0x21, PORT_DIAG);
232 SET_BDA(kbd_led, led_flags);
236 // INT 16h Keyboard Service Entry Point
238 handle_16(struct bregs *regs)
247 case 0x00: handle_1600(regs); break;
248 case 0x01: handle_1601(regs); break;
249 case 0x02: handle_1602(regs); break;
250 case 0x05: handle_1605(regs); break;
251 case 0x09: handle_1609(regs); break;
252 case 0x0a: handle_160a(regs); break;
253 case 0x10: handle_1610(regs); break;
254 case 0x11: handle_1611(regs); break;
255 case 0x12: handle_1612(regs); break;
256 case 0x92: handle_1692(regs); break;
257 case 0xa2: handle_16a2(regs); break;
258 case 0x6f: handle_166f(regs); break;
263 #define MAX_SCAN_CODE 0x58
265 static struct scaninfo {
271 } scan_to_scanascii[MAX_SCAN_CODE + 1] = {
272 { none, none, none, none, none },
273 { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
274 { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
275 { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
276 { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
277 { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
278 { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
279 { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
280 { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
281 { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
282 { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
283 { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
284 { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
285 { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
286 { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
287 { 0x0f09, 0x0f00, none, none, none }, /* tab */
288 { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */
289 { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */
290 { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */
291 { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */
292 { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */
293 { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */
294 { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */
295 { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */
296 { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */
297 { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */
298 { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
299 { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
300 { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
301 { none, none, none, none, none }, /* L Ctrl */
302 { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */
303 { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */
304 { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */
305 { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */
306 { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */
307 { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */
308 { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */
309 { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */
310 { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */
311 { 0x273b, 0x273a, none, none, none }, /* ;: */
312 { 0x2827, 0x2822, none, none, none }, /* '" */
313 { 0x2960, 0x297e, none, none, none }, /* `~ */
314 { none, none, none, none, none }, /* L shift */
315 { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
316 { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */
317 { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */
318 { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */
319 { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */
320 { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */
321 { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */
322 { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */
323 { 0x332c, 0x333c, none, none, none }, /* ,< */
324 { 0x342e, 0x343e, none, none, none }, /* .> */
325 { 0x352f, 0x353f, none, none, none }, /* /? */
326 { none, none, none, none, none }, /* R Shift */
327 { 0x372a, 0x372a, none, none, none }, /* * */
328 { none, none, none, none, none }, /* L Alt */
329 { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
330 { none, none, none, none, none }, /* caps lock */
331 { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
332 { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
333 { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
334 { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
335 { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
336 { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
337 { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
338 { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
339 { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
340 { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
341 { none, none, none, none, none }, /* Num Lock */
342 { none, none, none, none, none }, /* Scroll Lock */
343 { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */
344 { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */
345 { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */
346 { 0x4a2d, 0x4a2d, none, none, none }, /* - */
347 { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */
348 { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */
349 { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */
350 { 0x4e2b, 0x4e2b, none, none, none }, /* + */
351 { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */
352 { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */
353 { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */
354 { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */
355 { 0x5300, 0x532e, none, none, 0x20 }, /* Del */
356 { none, none, none, none, none },
357 { none, none, none, none, none },
358 { 0x565c, 0x567c, none, none, none }, /* \| */
359 { 0x5700, 0x5700, none, none, none }, /* F11 */
360 { 0x5800, 0x5800, none, none, none } /* F12 */
364 process_key(u8 scancode)
366 u8 shift_flags = GET_BDA(kbd_flag0);
367 u8 mf2_flags = GET_BDA(kbd_flag1);
368 u8 mf2_state = GET_BDA(kbd_mode);
372 BX_INFO("KBD: int09 handler: AL=0\n");
375 case 0x3a: /* Caps Lock press */
377 SET_BDA(kbd_flag0, shift_flags);
379 SET_BDA(kbd_flag1, mf2_flags);
381 case 0xba: /* Caps Lock release */
383 SET_BDA(kbd_flag1, mf2_flags);
386 case 0x2a: /* L Shift press */
388 SET_BDA(kbd_flag0, shift_flags);
390 case 0xaa: /* L Shift release */
391 shift_flags &= ~0x02;
392 SET_BDA(kbd_flag0, shift_flags);
395 case 0x36: /* R Shift press */
397 SET_BDA(kbd_flag0, shift_flags);
399 case 0xb6: /* R Shift release */
400 shift_flags &= ~0x01;
401 SET_BDA(kbd_flag0, shift_flags);
404 case 0x1d: /* Ctrl press */
405 if ((mf2_state & 0x01) == 0) {
407 SET_BDA(kbd_flag0, shift_flags);
408 if (mf2_state & 0x02) {
410 SET_BDA(kbd_mode, mf2_state);
413 SET_BDA(kbd_flag1, mf2_flags);
417 case 0x9d: /* Ctrl release */
418 if ((mf2_state & 0x01) == 0) {
419 shift_flags &= ~0x04;
420 SET_BDA(kbd_flag0, shift_flags);
421 if (mf2_state & 0x02) {
423 SET_BDA(kbd_mode, mf2_state);
426 SET_BDA(kbd_flag1, mf2_flags);
431 case 0x38: /* Alt press */
433 SET_BDA(kbd_flag0, shift_flags);
434 if (mf2_state & 0x02) {
436 SET_BDA(kbd_mode, mf2_state);
439 SET_BDA(kbd_flag1, mf2_flags);
442 case 0xb8: /* Alt release */
443 shift_flags &= ~0x08;
444 SET_BDA(kbd_flag0, shift_flags);
445 if (mf2_state & 0x02) {
447 SET_BDA(kbd_mode, mf2_state);
450 SET_BDA(kbd_flag1, mf2_flags);
454 case 0x45: /* Num Lock press */
455 if ((mf2_state & 0x03) == 0) {
457 SET_BDA(kbd_flag1, mf2_flags);
459 SET_BDA(kbd_flag0, shift_flags);
462 case 0xc5: /* Num Lock release */
463 if ((mf2_state & 0x03) == 0) {
465 SET_BDA(kbd_flag1, mf2_flags);
469 case 0x46: /* Scroll Lock press */
471 SET_BDA(kbd_flag1, mf2_flags);
473 SET_BDA(kbd_flag0, shift_flags);
475 case 0xc6: /* Scroll Lock release */
477 SET_BDA(kbd_flag1, mf2_flags);
482 SETBITS_BDA(kbd_mode, 0x02);
486 SETBITS_BDA(kbd_mode, 0x01);
490 if (scancode & 0x80) {
491 break; /* toss key releases ... */
493 if (scancode > MAX_SCAN_CODE) {
494 BX_INFO("KBD: int09h_handler(): unknown scancode read: 0x%02x!\n", scancode);
498 struct scaninfo *info = &scan_to_scanascii[scancode];
499 if (shift_flags & 0x08) { /* ALT */
500 asciicode = GET_VAR(CS, info->alt);
501 scancode = GET_VAR(CS, info->alt) >> 8;
502 } else if (shift_flags & 0x04) { /* CONTROL */
503 asciicode = GET_VAR(CS, info->control);
504 scancode = GET_VAR(CS, info->control) >> 8;
505 } else if (((mf2_state & 0x02) > 0) && ((scancode >= 0x47) && (scancode <= 0x53))) {
506 /* extended keys handling */
508 scancode = GET_VAR(CS, info->normal) >> 8;
509 } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */
510 /* check if lock state should be ignored
511 * because a SHIFT key are pressed */
513 if (shift_flags & GET_VAR(CS, info->lock_flags)) {
514 asciicode = GET_VAR(CS, info->normal);
515 scancode = GET_VAR(CS, info->normal) >> 8;
517 asciicode = GET_VAR(CS, info->shift);
518 scancode = GET_VAR(CS, info->shift) >> 8;
521 /* check if lock is on */
522 if (shift_flags & GET_VAR(CS, info->lock_flags)) {
523 asciicode = GET_VAR(CS, info->shift);
524 scancode = GET_VAR(CS, info->shift) >> 8;
526 asciicode = GET_VAR(CS, info->normal);
527 scancode = GET_VAR(CS, info->normal) >> 8;
530 if (scancode==0 && asciicode==0) {
531 BX_INFO("KBD: int09h_handler(): scancode & asciicode are zero?\n");
533 enqueue_key(scancode, asciicode);
536 if ((scancode & 0x7f) != 0x1d) {
540 SET_BDA(kbd_mode, mf2_state);
543 // INT09h : Keyboard Hardware Service Entry Point
550 outb(0xad, PORT_PS2_STATUS);
552 outb(0x0b, PORT_PIC1);
553 if ((inb(PORT_PIC1) & 0x02) == 0)
556 // read key from keyboard controller
557 u8 key = inb(PORT_PS2_DATA);
559 if (CONFIG_KBD_CALL_INT15_4F) {
560 // allow for keyboard intercept
562 memset(&tr, 0, sizeof(tr));
566 call16_int(0x15, &tr);
567 if (!(tr.flags & F_CF))
578 outb(0xae, PORT_PS2_STATUS);