WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/ports/mesa/src-glut.dos/pc_hw/pc

Rev	Author	Line No.	Line
56	pj	1	/*
		2	* PC/HW routine collection v1.1 for DOS/DJGPP
		3	*
		4	* Copyright (C) 2002 - Borca Daniel
		5	* Email : dborca@yahoo.com
		6	* Web : http://www.geocities.com/dborca
		7	*/
		8
		9
		10	#include <pc.h>
		11	#include <sys/exceptn.h>
		12	#include <sys/farptr.h>
		13
		14	#include "pc_hw.h"
		15
		16
		17
		18	#define KEYB_IRQ 1
		19
		20	#define KEY_BUFFER_SIZE 64
		21
		22	#define KB_MODIFIERS (KB_SHIFT_FLAG \| KB_CTRL_FLAG \| KB_ALT_FLAG \| KB_LWIN_FLAG \| KB_RWIN_FLAG \| KB_MENU_FLAG)
		23	#define KB_LED_FLAGS (KB_SCROLOCK_FLAG \| KB_NUMLOCK_FLAG \| KB_CAPSLOCK_FLAG)
		24
		25	static int keyboard_installed;
		26
		27	static volatile struct {
		28	volatile int start, end;
		29	volatile int key[KEY_BUFFER_SIZE];
		30	} key_buffer;
		31
		32	static volatile int key_enhanced, key_pause_loop, key_shifts;
		33	static int leds_ok = TRUE;
		34	static int in_a_terrupt = FALSE;
		35	static volatile char pc_key[KEY_MAX];
		36
		37
		38
		39	/* convert Allegro format scancodes into key_shifts flag bits */
		40	static unsigned short modifier_table[KEY_MAX - KEY_MODIFIERS] =
		41	{
		42	KB_SHIFT_FLAG, KB_SHIFT_FLAG, KB_CTRL_FLAG,
		43	KB_CTRL_FLAG, KB_ALT_FLAG, KB_ALT_FLAG,
		44	KB_LWIN_FLAG, KB_RWIN_FLAG, KB_MENU_FLAG,
		45	KB_SCROLOCK_FLAG, KB_NUMLOCK_FLAG, KB_CAPSLOCK_FLAG
		46	};
		47
		48
		49
		50	/* lookup table for converting hardware scancodes into Allegro format */
		51	static unsigned char hw_to_mycode[128] =
		52	{
		53	/* 0x00 */ 0, KEY_ESC, KEY_1, KEY_2,
		54	/* 0x04 */ KEY_3, KEY_4, KEY_5, KEY_6,
		55	/* 0x08 */ KEY_7, KEY_8, KEY_9, KEY_0,
		56	/* 0x0C */ KEY_MINUS, KEY_EQUALS, KEY_BACKSPACE, KEY_TAB,
		57	/* 0x10 */ KEY_Q, KEY_W, KEY_E, KEY_R,
		58	/* 0x14 */ KEY_T, KEY_Y, KEY_U, KEY_I,
		59	/* 0x18 */ KEY_O, KEY_P, KEY_OPENBRACE, KEY_CLOSEBRACE,
		60	/* 0x1C */ KEY_ENTER, KEY_LCONTROL, KEY_A, KEY_S,
		61	/* 0x20 */ KEY_D, KEY_F, KEY_G, KEY_H,
		62	/* 0x24 */ KEY_J, KEY_K, KEY_L, KEY_COLON,
		63	/* 0x28 */ KEY_QUOTE, KEY_TILDE, KEY_LSHIFT, KEY_BACKSLASH,
		64	/* 0x2C */ KEY_Z, KEY_X, KEY_C, KEY_V,
		65	/* 0x30 */ KEY_B, KEY_N, KEY_M, KEY_COMMA,
		66	/* 0x34 */ KEY_STOP, KEY_SLASH, KEY_RSHIFT, KEY_ASTERISK,
		67	/* 0x38 */ KEY_ALT, KEY_SPACE, KEY_CAPSLOCK, KEY_F1,
		68	/* 0x3C */ KEY_F2, KEY_F3, KEY_F4, KEY_F5,
		69	/* 0x40 */ KEY_F6, KEY_F7, KEY_F8, KEY_F9,
		70	/* 0x44 */ KEY_F10, KEY_NUMLOCK, KEY_SCRLOCK, KEY_7_PAD,
		71	/* 0x48 */ KEY_8_PAD, KEY_9_PAD, KEY_MINUS_PAD, KEY_4_PAD,
		72	/* 0x4C */ KEY_5_PAD, KEY_6_PAD, KEY_PLUS_PAD, KEY_1_PAD,
		73	/* 0x50 */ KEY_2_PAD, KEY_3_PAD, KEY_0_PAD, KEY_DEL_PAD,
		74	/* 0x54 */ KEY_PRTSCR, 0, KEY_BACKSLASH2, KEY_F11,
		75	/* 0x58 */ KEY_F12, 0, 0, KEY_LWIN,
		76	/* 0x5C */ KEY_RWIN, KEY_MENU, 0, 0,
		77	/* 0x60 */ 0, 0, 0, 0,
		78	/* 0x64 */ 0, 0, 0, 0,
		79	/* 0x68 */ 0, 0, 0, 0,
		80	/* 0x6C */ 0, 0, 0, 0,
		81	/* 0x70 */ KEY_KANA, 0, 0, KEY_ABNT_C1,
		82	/* 0x74 */ 0, 0, 0, 0,
		83	/* 0x78 */ 0, KEY_CONVERT, 0, KEY_NOCONVERT,
		84	/* 0x7C */ 0, KEY_YEN, 0, 0
		85	};
		86
		87
		88
		89	/* lookup table for converting extended hardware codes into Allegro format */
		90	static unsigned char hw_to_mycode_ex[128] =
		91	{
		92	/* 0x00 */ 0, KEY_ESC, KEY_1, KEY_2,
		93	/* 0x04 */ KEY_3, KEY_4, KEY_5, KEY_6,
		94	/* 0x08 */ KEY_7, KEY_8, KEY_9, KEY_0,
		95	/* 0x0C */ KEY_MINUS, KEY_EQUALS, KEY_BACKSPACE, KEY_TAB,
		96	/* 0x10 */ KEY_CIRCUMFLEX, KEY_AT, KEY_COLON2, KEY_R,
		97	/* 0x14 */ KEY_KANJI, KEY_Y, KEY_U, KEY_I,
		98	/* 0x18 */ KEY_O, KEY_P, KEY_OPENBRACE, KEY_CLOSEBRACE,
		99	/* 0x1C */ KEY_ENTER_PAD, KEY_RCONTROL, KEY_A, KEY_S,
		100	/* 0x20 */ KEY_D, KEY_F, KEY_G, KEY_H,
		101	/* 0x24 */ KEY_J, KEY_K, KEY_L, KEY_COLON,
		102	/* 0x28 */ KEY_QUOTE, KEY_TILDE, 0, KEY_BACKSLASH,
		103	/* 0x2C */ KEY_Z, KEY_X, KEY_C, KEY_V,
		104	/* 0x30 */ KEY_B, KEY_N, KEY_M, KEY_COMMA,
		105	/* 0x34 */ KEY_STOP, KEY_SLASH_PAD, 0, KEY_PRTSCR,
		106	/* 0x38 */ KEY_ALTGR, KEY_SPACE, KEY_CAPSLOCK, KEY_F1,
		107	/* 0x3C */ KEY_F2, KEY_F3, KEY_F4, KEY_F5,
		108	/* 0x40 */ KEY_F6, KEY_F7, KEY_F8, KEY_F9,
		109	/* 0x44 */ KEY_F10, KEY_NUMLOCK, KEY_PAUSE, KEY_HOME,
		110	/* 0x48 */ KEY_UP, KEY_PGUP, KEY_MINUS_PAD, KEY_LEFT,
		111	/* 0x4C */ KEY_5_PAD, KEY_RIGHT, KEY_PLUS_PAD, KEY_END,
		112	/* 0x50 */ KEY_DOWN, KEY_PGDN, KEY_INSERT, KEY_DEL,
		113	/* 0x54 */ KEY_PRTSCR, 0, KEY_BACKSLASH2, KEY_F11,
		114	/* 0x58 */ KEY_F12, 0, 0, KEY_LWIN,
		115	/* 0x5C */ KEY_RWIN, KEY_MENU, 0, 0,
		116	/* 0x60 */ 0, 0, 0, 0,
		117	/* 0x64 */ 0, 0, 0, 0,
		118	/* 0x68 */ 0, 0, 0, 0,
		119	/* 0x6C */ 0, 0, 0, 0,
		120	/* 0x70 */ 0, 0, 0, 0,
		121	/* 0x74 */ 0, 0, 0, 0,
		122	/* 0x78 */ 0, 0, 0, 0,
		123	/* 0x7C */ 0, 0, 0, 0
		124	};
		125
		126
		127
		128	/* default mapping table for the US keyboard layout */
		129	static unsigned short standard_key_ascii_table[KEY_MAX] =
		130	{
		131	/* start */ 0,
		132	/* alphabet */ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
		133	/* numbers */ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		134	/* numpad */ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		135	/* func keys */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		136	/* misc chars */ 27, '`', '-', '=', 8, 9, '[', ']', 13, ';', '\'', '\\', '\\', ',', '.', '/', ' ',
		137	/* controls */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		138	/* numpad / '/', '', '-', '+', '.', 13,
		139	/* modifiers */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
		140	};
		141
		142
		143
		144	/* capslock mapping table for the US keyboard layout */
		145	static unsigned short standard_key_capslock_table[KEY_MAX] =
		146	{
		147	/* start */ 0,
		148	/* alphabet */ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
		149	/* numbers */ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		150	/* numpad */ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		151	/* func keys */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		152	/* misc chars */ 27, '`', '-', '=', 8, 9, '[', ']', 13, ';', '\'', '\\', '\\', ',', '.', '/', ' ',
		153	/* controls */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		154	/* numpad / '/', '', '-', '+', '.', 13,
		155	/* modifiers */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
		156	};
		157
		158
		159
		160	/* shifted mapping table for the US keyboard layout */
		161	static unsigned short standard_key_shift_table[KEY_MAX] =
		162	{
		163	/* start */ 0,
		164	/* alphabet */ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
		165	/* numbers / ')', '!', '@', '#', '$', '%', '^', '&', '', '(',
		166	/* numpad */ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		167	/* func keys */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		168	/* misc chars */ 27, '~', '_', '+', 8, 9, '{', '}', 13, ':', '"', '\|', '\|', '<', '>', '?', ' ',
		169	/* controls */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		170	/* numpad / '/', '', '-', '+', '.', 13,
		171	/* modifiers */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
		172	};
		173
		174
		175
		176	/* ctrl+key mapping table for the US keyboard layout */
		177	static unsigned short standard_key_control_table[KEY_MAX] =
		178	{
		179	/* start */ 0,
		180	/* alphabet */ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
		181	/* numbers */ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
		182	/* numpad */ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		183	/* func keys */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		184	/* misc chars */ 27, 2, 2, 2, 127, 127, 2, 2, 10, 2, 2, 2, 2, 2, 2, 2, 2,
		185	/* controls */ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
		186	/* numpad */ 2, 2, 2, 2, 2, 10,
		187	/* modifiers */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
		188	};
		189
		190
		191
		192	/* convert numeric pad scancodes into arrow codes */
		193	static unsigned char numlock_table[10] =
		194	{
		195	KEY_INSERT, KEY_END, KEY_DOWN, KEY_PGDN, KEY_LEFT,
		196	KEY_5_PAD, KEY_RIGHT, KEY_HOME, KEY_UP, KEY_PGUP
		197	};
		198
		199
		200
		201	/* kb_wait_for_write_ready:
		202	* Wait for the keyboard controller to set the ready-for-write bit.
		203	*/
		204	static __inline int kb_wait_for_write_ready (void)
		205	{
		206	int timeout = 4096;
		207
		208	while ((timeout>0) && (inportb(0x64)&2)) timeout--;
		209
		210	return (timeout>0);
		211	}
		212
		213
		214
		215	/* kb_wait_for_read_ready:
		216	* Wait for the keyboard controller to set the ready-for-read bit.
		217	*/
		218	static __inline int kb_wait_for_read_ready (void)
		219	{
		220	int timeout = 16384;
		221
		222	while ((timeout>0) && (!(inportb(0x64)&1))) timeout--;
		223
		224	return (timeout>0);
		225	}
		226
		227
		228
		229	/* kb_send_data:
		230	* Sends a byte to the keyboard controller. Returns 1 if all OK.
		231	*/
		232	static __inline int kb_send_data (unsigned char data)
		233	{
		234	int resends = 4;
		235	int timeout, temp;
		236
		237	do {
		238	if (!kb_wait_for_write_ready())
		239	return 0;
		240
		241	outportb(0x60, data);
		242	timeout = 4096;
		243
		244	while (--timeout>0) {
		245	if (!kb_wait_for_read_ready())
		246	return 0;
		247
		248	temp = inportb(0x60);
		249
		250	if (temp == 0xFA)
		251	return 1;
		252
		253	if (temp == 0xFE)
		254	break;
		255	}
		256	} while ((resends-- > 0) && (timeout > 0));
		257
		258	return 0;
		259	}
		260
		261
		262
		263	static void update_leds (int leds)
		264	{
		265	if (leds_ok) {
		266	if (!in_a_terrupt)
		267	DISABLE();
		268
		269	if (!kb_send_data(0xED)) {
		270	kb_send_data(0xF4);
		271	leds_ok = FALSE;
		272	} else if (!kb_send_data((leds>>8)&7)) {
		273	kb_send_data(0xF4);
		274	leds_ok = FALSE;
		275	}
		276
		277	if (!in_a_terrupt)
		278	ENABLE();
		279	}
		280	} ENDOFUNC(update_leds)
		281
		282
		283
		284	static void inject_key (int scancode)
		285	{
		286	unsigned short *table;
		287
		288	if ((scancode >= KEY_0_PAD) && (scancode <= KEY_9_PAD)) {
		289	if (((key_shifts & KB_NUMLOCK_FLAG) != 0) == ((key_shifts & KB_SHIFT_FLAG) != 0)) {
		290	scancode = numlock_table[scancode - KEY_0_PAD];
		291	}
		292	table = standard_key_ascii_table;
		293	} else if (key_shifts & KB_CTRL_FLAG) {
		294	table = standard_key_control_table;
		295	} else if (key_shifts & KB_SHIFT_FLAG) {
		296	if (key_shifts & KB_CAPSLOCK_FLAG) {
		297	if (standard_key_ascii_table[scancode]==standard_key_capslock_table[scancode]) {
		298	table = standard_key_shift_table;
		299	} else {
		300	table = standard_key_ascii_table;
		301	}
		302	} else {
		303	table = standard_key_shift_table;
		304	}
		305	} else if (key_shifts & KB_CAPSLOCK_FLAG) {
		306	table = standard_key_capslock_table;
		307	} else {
		308	table = standard_key_ascii_table;
		309	}
		310
		311	key_buffer.key[key_buffer.end++] = (scancode<<16)\|table[scancode];
		312
		313	if (key_buffer.end>=KEY_BUFFER_SIZE)
		314	key_buffer.end = 0;
		315	if (key_buffer.end==key_buffer.start) {
		316	key_buffer.start++;
		317	if (key_buffer.start>=KEY_BUFFER_SIZE)
		318	key_buffer.start = 0;
		319	}
		320	} ENDOFUNC(inject_key)
		321
		322	static void handle_code (int scancode, int keycode)
		323	{
		324	in_a_terrupt++;
		325
		326	if (keycode==0) { /* pause */
		327	inject_key(scancode);
		328	pc_key[KEY_PAUSE] ^= TRUE;
		329	} else if (scancode) {
		330	int flag;
		331
		332	if (scancode>=KEY_MODIFIERS) {
		333	flag = modifier_table[scancode - KEY_MODIFIERS];
		334	} else {
		335	flag = 0;
		336	}
		337	if ((char)keycode<0) { /* release */
		338	pc_key[scancode] = FALSE;
		339	if (flag&KB_MODIFIERS) {
		340	key_shifts &= ~flag;
		341	}
		342	} else { /* keypress */
		343	pc_key[scancode] = TRUE;
		344	if (flag&KB_MODIFIERS) {
		345	key_shifts \|= flag;
		346	}
		347	if (flag&KB_LED_FLAGS) {
		348	key_shifts ^= flag;
		349	update_leds(key_shifts);
		350	}
		351	if (scancode<KEY_MODIFIERS) {
		352	inject_key(scancode);
		353	}
		354	}
		355	}
		356
		357	in_a_terrupt--;
		358	} ENDOFUNC(handle_code)
		359
		360	static __inline void satisfy (void)
		361	{
		362	__asm("\n\
		363	inb $0x61, %%al \n\
		364	movb %%al, %%ah \n\
		365	orb $0x80, %%al \n\
		366	outb %%al, $0x61 \n\
		367	xchgb %%al, %%ah \n\
		368	outb %%al, $0x61 \n\
		369	movb $0x20, %%al \n\
		370	outb %%al, $0x20 \n\
		371	":::"%eax");
		372	}
		373
		374	static int keyboard ()
		375	{
		376	unsigned char temp, scancode;
		377
		378	temp = inportb(0x60);
		379
		380	if (temp<=0xe1) {
		381	if (key_pause_loop) {
		382	if (!--key_pause_loop) handle_code(KEY_PAUSE, 0);
		383	} else
		384	switch (temp) {
		385	case 0xe0:
		386	key_enhanced = TRUE;
		387	break;
		388	case 0xe1:
		389	key_pause_loop = 5;
		390	break;
		391	default:
		392	if (key_enhanced) {
		393	key_enhanced = FALSE;
		394	scancode = hw_to_mycode_ex[temp&0x7f];
		395	} else {
		396	scancode = hw_to_mycode[temp&0x7f];
		397	}
		398	handle_code(scancode, temp);
		399	}
		400	}
		401
		402	if (((temp==0x4F)\|\|(temp==0x53))&&(key_shifts&KB_CTRL_FLAG)&&(key_shifts&KB_ALT_FLAG)) {
		403	/* Hack alert:
		404	only SIGINT (but not Ctrl-Break)
		405	calls the destructors and will safely clean up
		406	*/
		407	__asm("\n\
		408	movb $0x79, %%al \n\
		409	call ___djgpp_hw_exception \n\
		410	":::"%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
		411	}
		412
		413	satisfy();
		414	return 0;
		415	} ENDOFUNC(keyboard)
		416
		417
		418	int pc_keypressed (void)
		419	{
		420	return (key_buffer.start!=key_buffer.end);
		421	}
		422
		423	int pc_readkey (void)
		424	{
		425	if (keyboard_installed) {
		426	int key;
		427
		428	do {
		429	} while (key_buffer.start==key_buffer.end);
		430
		431	DISABLE();
		432	key = key_buffer.key[key_buffer.start++];
		433	if (key_buffer.start>=KEY_BUFFER_SIZE)
		434	key_buffer.start = 0;
		435	ENABLE();
		436
		437	return key;
		438	} else {
		439	return 0;
		440	}
		441	}
		442
		443	int pc_keydown (int code)
		444	{
		445	return pc_key[code];
		446	}
		447
		448	void pc_remove_keyb (void)
		449	{
		450	if (keyboard_installed) {
		451	int s1, s2, s3;
		452
		453	keyboard_installed = FALSE;
		454	pc_clexit(pc_remove_keyb);
		455
		456	DISABLE();
		457	_farsetsel(__djgpp_dos_sel);
		458	_farnspokew(0x41c, _farnspeekw(0x41a));
		459
		460	s1 = _farnspeekb(0x417) & 0x80;
		461	s2 = _farnspeekb(0x418) & 0xFC;
		462	s3 = _farnspeekb(0x496) & 0xF3;
		463
		464	if (pc_key[KEY_RSHIFT]) { s1 \|= 1; }
		465	if (pc_key[KEY_LSHIFT]) { s1 \|= 2; }
		466	if (pc_key[KEY_LCONTROL]) { s2 \|= 1; s1 \|= 4; }
		467	if (pc_key[KEY_ALT]) { s1 \|= 8; s2 \|= 2; }
		468	if (pc_key[KEY_RCONTROL]) { s1 \|= 4; s3 \|= 4; }
		469	if (pc_key[KEY_ALTGR]) { s1 \|= 8; s3 \|= 8; }
		470
		471	if (key_shifts&KB_SCROLOCK_FLAG) s1 \|= 16;
		472	if (key_shifts&KB_NUMLOCK_FLAG) s1 \|= 32;
		473	if (key_shifts&KB_CAPSLOCK_FLAG) s1 \|= 64;
		474
		475	_farnspokeb(0x417, s1);
		476	_farnspokeb(0x418, s2);
		477	_farnspokeb(0x496, s3);
		478	update_leds(key_shifts);
		479
		480	ENABLE();
		481	pc_remove_irq(KEYB_IRQ);
		482	}
		483	}
		484
		485	int pc_install_keyb (void)
		486	{
		487	if (keyboard_installed\|\|pc_install_irq(KEYB_IRQ, keyboard)) {
		488	return -1;
		489	} else {
		490	int s1, s2, s3;
		491
		492	LOCKDATA(key_buffer);
		493	LOCKDATA(key_enhanced);
		494	LOCKDATA(key_pause_loop);
		495	LOCKDATA(key_shifts);
		496	LOCKDATA(leds_ok);
		497	LOCKDATA(in_a_terrupt);
		498	LOCKDATA(pc_key);
		499	LOCKDATA(modifier_table);
		500	LOCKDATA(hw_to_mycode);
		501	LOCKDATA(hw_to_mycode_ex);
		502	LOCKDATA(standard_key_ascii_table);
		503	LOCKDATA(standard_key_capslock_table);
		504	LOCKDATA(standard_key_shift_table);
		505	LOCKDATA(standard_key_control_table);
		506	LOCKDATA(numlock_table);
		507	LOCKFUNC(update_leds);
		508	LOCKFUNC(inject_key);
		509	LOCKFUNC(handle_code);
		510	LOCKFUNC(keyboard);
		511
		512	DISABLE();
		513	_farsetsel(__djgpp_dos_sel);
		514	_farnspokew(0x41c, _farnspeekw(0x41a));
		515
		516	key_shifts = 0;
		517	s1 = _farnspeekb(0x417);
		518	s2 = _farnspeekb(0x418);
		519	s3 = _farnspeekb(0x496);
		520
		521	if (s1&1) { key_shifts \|= KB_SHIFT_FLAG; pc_key[KEY_RSHIFT] = TRUE; }
		522	if (s1&2) { key_shifts \|= KB_SHIFT_FLAG; pc_key[KEY_LSHIFT] = TRUE; }
		523	if (s2&1) { key_shifts \|= KB_CTRL_FLAG; pc_key[KEY_LCONTROL] = TRUE; }
		524	if (s2&2) { key_shifts \|= KB_ALT_FLAG; pc_key[KEY_ALT] = TRUE; }
		525	if (s3&4) { key_shifts \|= KB_CTRL_FLAG; pc_key[KEY_RCONTROL] = TRUE; }
		526	if (s3&8) { key_shifts \|= KB_ALT_FLAG; pc_key[KEY_ALTGR] = TRUE; }
		527
		528	if (s1&16) key_shifts \|= KB_SCROLOCK_FLAG;
		529	if (s1&32) key_shifts \|= KB_NUMLOCK_FLAG;
		530	if (s1&64) key_shifts \|= KB_CAPSLOCK_FLAG;
		531	update_leds(key_shifts);
		532
		533	key_enhanced = key_pause_loop = 0;
		534	key_buffer.start = key_buffer.end = 0;
		535	ENABLE();
		536
		537	pc_atexit(pc_remove_keyb);
		538	keyboard_installed = TRUE;
		539	return 0;
		540	}
		541	}

Subversion Repositories shark

(root)/shark/branches/xen/ports/mesa/src-glut.dos/pc_hw/pc_keyb.c - Rev 1618