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Kevin O'Connorf076a3e2008-02-25 22:25:15 -05001// 16bit code to handle keyboard requests.
2//
3// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4// Copyright (C) 2002 MandrakeSoft S.A.
5//
6// This file may be distributed under the terms of the GNU GPLv3 license.
7
8#include "biosvar.h" // struct bregs
9#include "util.h" // debug_enter
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -050010#include "config.h" // CONFIG_*
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050011
Kevin O'Connor4b60c002008-02-25 22:29:55 -050012static u8
13enqueue_key(u8 scan_code, u8 ascii_code)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050014{
Kevin O'Connor4b60c002008-02-25 22:29:55 -050015 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
16 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
17
18 u16 buffer_head = GET_BDA(kbd_buf_head);
19 u16 buffer_tail = GET_BDA(kbd_buf_tail);
20
21 u16 temp_tail = buffer_tail;
22 buffer_tail += 2;
23 if (buffer_tail >= buffer_end)
24 buffer_tail = buffer_start;
25
26 if (buffer_tail == buffer_head)
27 return 0;
28
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);
32 return 1;
33}
34
35static u8
36dequeue_key(u8 *scan_code, u8 *ascii_code, u8 incr)
37{
38 u16 buffer_head;
39 u16 buffer_tail;
40 for (;;) {
41 buffer_head = GET_BDA(kbd_buf_head);
42 buffer_tail = GET_BDA(kbd_buf_tail);
43
44 if (buffer_head != buffer_tail)
45 break;
46 if (!incr)
47 return 0;
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -050048 nop();
Kevin O'Connor4b60c002008-02-25 22:29:55 -050049 }
50
51 *ascii_code = GET_FARVAR(0x0000, *(u8*)(buffer_head+0x400+0));
52 *scan_code = GET_FARVAR(0x0000, *(u8*)(buffer_head+0x400+1));
53
54 if (incr) {
55 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
56 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
57
58 buffer_head += 2;
59 if (buffer_head >= buffer_end)
60 buffer_head = buffer_start;
61 SET_BDA(kbd_buf_head, buffer_head);
62 }
63 return 1;
64}
65
66// read keyboard input
67static void
68handle_1600(struct bregs *regs)
69{
70 u8 scan_code, ascii_code;
71 dequeue_key(&scan_code, &ascii_code, 1);
72 if (scan_code != 0 && ascii_code == 0xF0)
73 ascii_code = 0;
74 else if (ascii_code == 0xE0)
75 ascii_code = 0;
76 regs->ax = (scan_code << 8) | ascii_code;
77}
78
79// check keyboard status
80static void
81handle_1601(struct bregs *regs)
82{
83 u8 scan_code, ascii_code;
84 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
85 regs->flags |= F_ZF;
86 return;
87 }
88 if (scan_code != 0 && ascii_code == 0xF0)
89 ascii_code = 0;
90 else if (ascii_code == 0xE0)
91 ascii_code = 0;
92 regs->ax = (scan_code << 8) | ascii_code;
93 regs->flags &= ~F_ZF;
94}
95
96// get shift flag status
97static void
98handle_1602(struct bregs *regs)
99{
100 regs->al = GET_BDA(kbd_flag0);
101}
102
103// store key-stroke into buffer
104static void
105handle_1605(struct bregs *regs)
106{
107 regs->al = !enqueue_key(regs->ch, regs->cl);
108}
109
110// GET KEYBOARD FUNCTIONALITY
111static void
112handle_1609(struct bregs *regs)
113{
114 // bit Bochs Description
115 // 7 0 reserved
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
123 //
124 regs->al = 0x30;
125}
126
127// GET KEYBOARD ID
128static void
129handle_160a(struct bregs *regs)
130{
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500131 outb(0xf2, PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500132 /* Wait for data */
133 u16 max=0xffff;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500134 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500135 outb(0x00, PORT_DIAG);
136 if (!max)
137 return;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500138 if (inb(PORT_PS2_DATA) != 0xfa) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500139 regs->bx = 0;
140 return;
141 }
142 u16 kbd_code = 0;
143 u8 count = 2;
144 do {
145 max=0xffff;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500146 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500147 outb(0x00, PORT_DIAG);
148 if (max>0x0) {
149 kbd_code >>= 8;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500150 kbd_code |= (inb(PORT_PS2_DATA) << 8);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500151 }
152 } while (--count>0);
153 regs->bx = kbd_code;
154}
155
156// read MF-II keyboard input
157static void
158handle_1610(struct bregs *regs)
159{
160 u8 scan_code, ascii_code;
161 dequeue_key(&scan_code, &ascii_code, 1);
162 if (scan_code != 0 && ascii_code == 0xF0)
163 ascii_code = 0;
164 regs->ax = (scan_code << 8) | ascii_code;
165}
166
167// check MF-II keyboard status
168static void
169handle_1611(struct bregs *regs)
170{
171 u8 scan_code, ascii_code;
172 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
173 regs->flags |= F_ZF;
174 return;
175 }
176 if (scan_code != 0 && ascii_code == 0xF0)
177 ascii_code = 0;
178 regs->ax = (scan_code << 8) | ascii_code;
179 regs->flags &= ~F_ZF;
180}
181
182// get extended keyboard status
183static void
184handle_1612(struct bregs *regs)
185{
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);
189}
190
191static void
192handle_166f(struct bregs *regs)
193{
194 if (regs->al == 0x08)
195 // unsupported, aka normal keyboard
196 regs->ah = 2;
197}
198
199// keyboard capability check called by DOS 5.0+ keyb
200static void
201handle_1692(struct bregs *regs)
202{
203 // function int16 ah=0x10-0x12 supported
204 regs->ah = 0x80;
205}
206
207// 122 keys capability check called by DOS 5.0+ keyb
208static void
209handle_16a2(struct bregs *regs)
210{
211 // don't change AH : function int16 ah=0x20-0x22 NOT supported
212}
213
214static void
215set_leds()
216{
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))
220 return;
221
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500222 outb(0xed, PORT_PS2_DATA);
223 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500224 outb(0x21, PORT_DIAG);
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500225 if (inb(PORT_PS2_DATA) == 0xfa) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500226 led_flags &= 0xf8;
227 led_flags |= (shift_flags >> 4) & 0x07;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500228 outb(led_flags & 0x07, PORT_PS2_DATA);
229 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500230 outb(0x21, PORT_DIAG);
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500231 inb(PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500232 SET_BDA(kbd_led, led_flags);
233 }
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500234}
235
236// INT 16h Keyboard Service Entry Point
237void VISIBLE
238handle_16(struct bregs *regs)
239{
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500240// debug_enter(regs);
241
242 set_leds();
243
244 irq_enable();
245
246 switch (regs->ah) {
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;
259 }
260}
261
262#define none 0
263#define MAX_SCAN_CODE 0x58
264
265static struct scaninfo {
266 u16 normal;
267 u16 shift;
268 u16 control;
269 u16 alt;
270 u8 lock_flags;
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 */
361};
362
363static void
364process_key(u8 scancode)
365{
366 u8 shift_flags = GET_BDA(kbd_flag0);
367 u8 mf2_flags = GET_BDA(kbd_flag1);
368 u8 mf2_state = GET_BDA(kbd_mode);
369
370 switch (scancode) {
371 case 0x00:
372 BX_INFO("KBD: int09 handler: AL=0\n");
373 return;
374
375 case 0x3a: /* Caps Lock press */
376 shift_flags ^= 0x40;
377 SET_BDA(kbd_flag0, shift_flags);
378 mf2_flags |= 0x40;
379 SET_BDA(kbd_flag1, mf2_flags);
380 break;
381 case 0xba: /* Caps Lock release */
382 mf2_flags &= ~0x40;
383 SET_BDA(kbd_flag1, mf2_flags);
384 break;
385
386 case 0x2a: /* L Shift press */
387 shift_flags |= 0x02;
388 SET_BDA(kbd_flag0, shift_flags);
389 break;
390 case 0xaa: /* L Shift release */
391 shift_flags &= ~0x02;
392 SET_BDA(kbd_flag0, shift_flags);
393 break;
394
395 case 0x36: /* R Shift press */
396 shift_flags |= 0x01;
397 SET_BDA(kbd_flag0, shift_flags);
398 break;
399 case 0xb6: /* R Shift release */
400 shift_flags &= ~0x01;
401 SET_BDA(kbd_flag0, shift_flags);
402 break;
403
404 case 0x1d: /* Ctrl press */
405 if ((mf2_state & 0x01) == 0) {
406 shift_flags |= 0x04;
407 SET_BDA(kbd_flag0, shift_flags);
408 if (mf2_state & 0x02) {
409 mf2_state |= 0x04;
410 SET_BDA(kbd_mode, mf2_state);
411 } else {
412 mf2_flags |= 0x01;
413 SET_BDA(kbd_flag1, mf2_flags);
414 }
415 }
416 break;
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) {
422 mf2_state &= ~0x04;
423 SET_BDA(kbd_mode, mf2_state);
424 } else {
425 mf2_flags &= ~0x01;
426 SET_BDA(kbd_flag1, mf2_flags);
427 }
428 }
429 break;
430
431 case 0x38: /* Alt press */
432 shift_flags |= 0x08;
433 SET_BDA(kbd_flag0, shift_flags);
434 if (mf2_state & 0x02) {
435 mf2_state |= 0x08;
436 SET_BDA(kbd_mode, mf2_state);
437 } else {
438 mf2_flags |= 0x02;
439 SET_BDA(kbd_flag1, mf2_flags);
440 }
441 break;
442 case 0xb8: /* Alt release */
443 shift_flags &= ~0x08;
444 SET_BDA(kbd_flag0, shift_flags);
445 if (mf2_state & 0x02) {
446 mf2_state &= ~0x08;
447 SET_BDA(kbd_mode, mf2_state);
448 } else {
449 mf2_flags &= ~0x02;
450 SET_BDA(kbd_flag1, mf2_flags);
451 }
452 break;
453
454 case 0x45: /* Num Lock press */
455 if ((mf2_state & 0x03) == 0) {
456 mf2_flags |= 0x20;
457 SET_BDA(kbd_flag1, mf2_flags);
458 shift_flags ^= 0x20;
459 SET_BDA(kbd_flag0, shift_flags);
460 }
461 break;
462 case 0xc5: /* Num Lock release */
463 if ((mf2_state & 0x03) == 0) {
464 mf2_flags &= ~0x20;
465 SET_BDA(kbd_flag1, mf2_flags);
466 }
467 break;
468
469 case 0x46: /* Scroll Lock press */
470 mf2_flags |= 0x10;
471 SET_BDA(kbd_flag1, mf2_flags);
472 shift_flags ^= 0x10;
473 SET_BDA(kbd_flag0, shift_flags);
474 break;
475 case 0xc6: /* Scroll Lock release */
476 mf2_flags &= ~0x10;
477 SET_BDA(kbd_flag1, mf2_flags);
478 break;
479
480 case 0xe0:
481 // Extended key
482 SETBITS_BDA(kbd_mode, 0x02);
483 return;
484 case 0xe1:
485 // Pause key
486 SETBITS_BDA(kbd_mode, 0x01);
487 return;
488
489 default:
490 if (scancode & 0x80) {
491 break; /* toss key releases ... */
492 }
493 if (scancode > MAX_SCAN_CODE) {
494 BX_INFO("KBD: int09h_handler(): unknown scancode read: 0x%02x!\n", scancode);
495 return;
496 }
497 u8 asciicode;
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 */
507 asciicode = 0xe0;
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 */
512
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;
516 } else {
517 asciicode = GET_VAR(CS, info->shift);
518 scancode = GET_VAR(CS, info->shift) >> 8;
519 }
520 } else {
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;
525 } else {
526 asciicode = GET_VAR(CS, info->normal);
527 scancode = GET_VAR(CS, info->normal) >> 8;
528 }
529 }
530 if (scancode==0 && asciicode==0) {
531 BX_INFO("KBD: int09h_handler(): scancode & asciicode are zero?\n");
532 }
533 enqueue_key(scancode, asciicode);
534 break;
535 }
536 if ((scancode & 0x7f) != 0x1d) {
537 mf2_state &= ~0x01;
538 }
539 mf2_state &= ~0x02;
540 SET_BDA(kbd_mode, mf2_state);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500541}
542
543// INT09h : Keyboard Hardware Service Entry Point
544void VISIBLE
545handle_09(struct bregs *regs)
546{
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500547 //debug_isr(regs);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500548
549 // disable keyboard
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500550 outb(0xad, PORT_PS2_STATUS);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500551
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500552 outb(0x0b, PORT_PIC1);
553 if ((inb(PORT_PIC1) & 0x02) == 0)
554 goto done;
555
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500556 // read key from keyboard controller
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500557 u8 key = inb(PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500558 irq_enable();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500559 if (CONFIG_KBD_CALL_INT15_4F) {
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500560 // allow for keyboard intercept
561 struct bregs tr;
562 memset(&tr, 0, sizeof(tr));
563 tr.al = key;
564 tr.ah = 0x4f;
565 tr.flags = F_CF;
566 call16_int(0x15, &tr);
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500567 if (!(tr.flags & F_CF))
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500568 goto done;
569 key = tr.al;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500570 }
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500571 process_key(key);
572
573 irq_disable();
574 eoi_master_pic();
575
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500576done:
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500577 // enable keyboard
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500578 outb(0xae, PORT_PS2_STATUS);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500579}