1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /*␊ |
25 | * Copyright 1993 NeXT Computer, Inc.␊ |
26 | * All rights reserved.␊ |
27 | */␊ |
28 | ␊ |
29 | /* Copyright 2007 David Elliott␊ |
30 | 2007-12-30 dfe␊ |
31 | - Enhanced code to normalize segment/offset to huge pointers so that any␊ |
32 | linear address within the first MB of memory can be passed to BIOS␊ |
33 | functions. This allows some of the __DATA sections to span into the␊ |
34 | next segment and also allows stack variables to be used whereas the␊ |
35 | old code could only operate on static data in the first 64k.␊ |
36 | NOTE: Requires bios.s change to respect DS.␊ |
37 | */␊ |
38 | /* Copyright 2007 VMware Inc.␊ |
39 | 2007-12-29 dfe␊ |
40 | - Added ebiosEjectMedia␊ |
41 | */␊ |
42 | ␊ |
43 | #include "libsaio.h"␊ |
44 | #include "bootstruct.h"␊ |
45 | ␊ |
46 | //#define MAX_DRIVES 8␊ |
47 | #ifndef DEBUG_BIOS␊ |
48 | #define DEBUG_BIOS 0␊ |
49 | #endif␊ |
50 | ␊ |
51 | #if DEBUG_BIOS␊ |
52 | #define DBG(x...)␉␉printf(x)␊ |
53 | #else␊ |
54 | #define DBG(x...)␉␉␊ |
55 | #endif␊ |
56 | ␊ |
57 | static biosBuf_t bb;␊ |
58 | #if DEBUG_BIOS␊ |
59 | static void print_drive_info(boot_drive_info_t *dp);␊ |
60 | #endif␊ |
61 | ␊ |
62 | int bgetc(void)␊ |
63 | {␊ |
64 | /* Poll for the next character. Most real BIOS do not need this as the␊ |
65 | INT 16h,AH=0h function will block until one is received.␊ |
66 | Unfortunately, Apple's EFI CSM will never wake up. This idea is lifted␊ |
67 | from the grub-a20.patch to GRUB's stage2/asm.S file.␊ |
68 | */␊ |
69 | while(!readKeyboardStatus())␊ |
70 | ;␊ |
71 | bb.intno = 0x16;␊ |
72 | bb.eax.r.h = 0x00;␊ |
73 | bios(&bb);␊ |
74 | return bb.eax.rr;␊ |
75 | }␊ |
76 | ␊ |
77 | int readKeyboardStatus(void)␊ |
78 | {␊ |
79 | bb.intno = 0x16;␊ |
80 | bb.eax.r.h = 0x01;␊ |
81 | bios(&bb);␊ |
82 | if (bb.flags.zf) {␊ |
83 | return 0;␊ |
84 | } else {␊ |
85 | return bb.eax.rr;␊ |
86 | }␊ |
87 | }␊ |
88 | ␊ |
89 | int readKeyboardShiftFlags(void)␊ |
90 | {␊ |
91 | bb.intno = 0x16;␊ |
92 | bb.eax.r.h = 0x02;␊ |
93 | bios(&bb);␊ |
94 | return bb.eax.r.l;␊ |
95 | }␊ |
96 | ␊ |
97 | ␊ |
98 | unsigned int time18(void)␊ |
99 | {␊ |
100 | union {␊ |
101 | struct {␊ |
102 | unsigned int low:16;␊ |
103 | unsigned int high:16;␊ |
104 | } s;␊ |
105 | unsigned int i;␊ |
106 | } time;␊ |
107 | ␊ |
108 | bb.intno = 0x1a;␊ |
109 | bb.eax.r.h = 0x00;␊ |
110 | bios(&bb);␊ |
111 | time.s.low = bb.edx.rr;␊ |
112 | time.s.high = bb.ecx.rr;␊ |
113 | return time.i;␊ |
114 | }␊ |
115 | ␊ |
116 | #if UNUSED␊ |
117 | static inline␊ |
118 | int bin2bcd (int x)␊ |
119 | {␊ |
120 | return (x%10) | ((x/10) << 4);␊ |
121 | }␊ |
122 | ␊ |
123 | ␊ |
124 | static inline␊ |
125 | int bcd2bin (int x)␊ |
126 | {␊ |
127 | return (x >> 4) * 10 + (x & 0x0f);␊ |
128 | }␊ |
129 | ␊ |
130 | time_t time(time_t *t)␊ |
131 | {␊ |
132 | static time_t lasttime, now;␊ |
133 | int hr, minute, sec;␊ |
134 | ␊ |
135 | bb.intno = 0x1a;␊ |
136 | bb.eax.r.h = 0x02;␊ |
137 | bios(&bb);␊ |
138 | ␊ |
139 | hr = bcd2bin((bb.ecx.rr & 0xff00) >> 8); /* hour in %ch */␊ |
140 | minute = bcd2bin(bb.ecx.rr & 0xff); /* minute in %cl */␊ |
141 | sec = bcd2bin((bb.edx.rr & 0xff00) >> 8); /* second in %dh */␊ |
142 | ␊ |
143 | now = hr * 3600 + minute * 60 + sec;␊ |
144 | if (now < lasttime)␊ |
145 | now += 24 * 3600;␊ |
146 | lasttime = now;␊ |
147 | ␊ |
148 | if (t != NULL)␊ |
149 | *t = now;␊ |
150 | return(now);␊ |
151 | ␊ |
152 | }␊ |
153 | #endif␊ |
154 | ␊ |
155 | #if 0␊ |
156 | static unsigned long rerangeMemoryMap(unsigned long count);␊ |
157 | static unsigned long rerangeMemoryMap(unsigned long count)␊ |
158 | {␊ |
159 | ␉int i, still_changing, newcount = count;␊ |
160 | ␊ |
161 | ␉MemoryRange * range = (MemoryRange *)BIOS_ADDR;␊ |
162 | ␉struct MemoryRange change_tmp;␊ |
163 | ␊ |
164 | ␉/* sort map list by memory addresses (low -> high) */␊ |
165 | ␉still_changing = 1;␊ |
166 | ␉while (still_changing) {␊ |
167 | ␉␉still_changing = 0;␊ |
168 | ␉␉for (i=1; i<count; i++) {␊ |
169 | ␉␉␉/* if <current_addr> > <last_addr>, swap */␊ |
170 | ␉␉␉if (range[i].base < range[i-1].base) {␊ |
171 | ␉␉␉␉change_tmp.base = range[i].base;␊ |
172 | ␉␉␉␉change_tmp.length = range[i].length;␊ |
173 | ␉␉␉␉change_tmp.type = range[i].type;␊ |
174 | ␊ |
175 | ␉␉␉␉range[i].base = range[i-1].base;␊ |
176 | ␉␉␉␉range[i].length = range[i-1].length;␊ |
177 | ␉␉␉␉range[i].type = range[i-1].type;␊ |
178 | ␊ |
179 | ␉␉␉␉range[i-1].base = change_tmp.base;␊ |
180 | ␉␉␉␉range[i-1].length = change_tmp.length;␊ |
181 | ␉␉␉␉range[i-1].type = change_tmp.type;␊ |
182 | ␊ |
183 | ␉␉␉␉still_changing=1;␊ |
184 | ␉␉␉}␊ |
185 | ␉␉}␊ |
186 | ␉}␊ |
187 | ␊ |
188 | ␉/* clear overlaps */␊ |
189 | ␉/* linux's arch/i386/kern/setup.c may have better algorithm */␊ |
190 | ␉for (i=1; i<count; i++) {␊ |
191 | ␉␉if ( range[i-1].base + range[i-1].length > range[i].base ) {␊ |
192 | ␉␉␉range[newcount].base = range[i].base + range[i].length;␊ |
193 | ␉␉␉range[newcount].length = range[i-1].base + range[i-1].length - range[newcount].base;␊ |
194 | ␉␉␉range[newcount].type = range[i-1].type;␊ |
195 | ␉␉␉newcount++;␊ |
196 | ␊ |
197 | ␉␉␉range[i-1].length = range[i].base - range[i-1].base;␊ |
198 | ␉␉}␊ |
199 | ␉}␊ |
200 | ␊ |
201 | ␉/*␊ |
202 | ␉ * 0xb0000000 : 0x10000000 NG␊ |
203 | ␉ * 0xc0000400 NG␊ |
204 | ␉ * 0xf2000000 NG␊ |
205 | ␉ */␊ |
206 | ␉range[newcount].base = 0xb0000000;␊ |
207 | ␉range[newcount].length = 0x0f000000;␊ |
208 | ␉range[newcount].type = kMemoryRangeUsable;␊ |
209 | ␉newcount++;␊ |
210 | ␊ |
211 | ␉return newcount;␊ |
212 | }␊ |
213 | #endif␊ |
214 | ␊ |
215 | unsigned long getMemoryMap( MemoryRange * rangeArray,␊ |
216 | unsigned long maxRangeCount,␊ |
217 | unsigned long * conMemSizePtr,␊ |
218 | unsigned long * extMemSizePtr )␊ |
219 | {␊ |
220 | #define kMemoryMapSignature 'SMAP'␊ |
221 | #define kDescriptorSizeMin 20␊ |
222 | ␊ |
223 | MemoryRange *␉range = (MemoryRange *)BIOS_ADDR;␊ |
224 | unsigned long␉count = 0;␊ |
225 | //unsigned long␉rerangedCount;␊ |
226 | unsigned long long␉conMemSize = 0;␊ |
227 | unsigned long long␉extMemSize = 0;␊ |
228 | ␊ |
229 | // Prepare for the INT15 E820h call. Each call returns a single␊ |
230 | // memory range. A continuation value is returned that must be␊ |
231 | // provided on a subsequent call to fetch the next range.␊ |
232 | //␊ |
233 | // Certain BIOSes (Award 6.00PG) expect the upper word in EAX␊ |
234 | // to be cleared on entry, otherwise only a single range will␊ |
235 | // be reported.␊ |
236 | //␊ |
237 | // Some BIOSes will simply ignore the value of ECX on entry.␊ |
238 | // Probably best to keep its value at 20 to avoid surprises.␊ |
239 | ␊ |
240 | //printf("Get memory map 0x%x, %d\n", rangeArray);getc();␊ |
241 | if (maxRangeCount > (BIOS_LEN / sizeof(MemoryRange))) {␊ |
242 | maxRangeCount = (BIOS_LEN / sizeof(MemoryRange));␊ |
243 | }␊ |
244 | bb.ebx.rx = 0; // Initial continuation value must be zero.␊ |
245 | ␊ |
246 | while ( count < maxRangeCount )␊ |
247 | {␊ |
248 | bb.intno = 0x15;␊ |
249 | bb.eax.rx = 0xe820;␊ |
250 | bb.ecx.rx = kDescriptorSizeMin;␊ |
251 | bb.edx.rx = kMemoryMapSignature;␊ |
252 | bb.edi.rr = NORMALIZED_OFFSET( (unsigned long) range );␊ |
253 | bb.es = NORMALIZED_SEGMENT( (unsigned long) range );␊ |
254 | bios(&bb);␊ |
255 | ␊ |
256 | // Check for errors.␊ |
257 | ␊ |
258 | if ( bb.flags.cf␊ |
259 | || bb.eax.rx != kMemoryMapSignature␊ |
260 | || bb.ecx.rx != kDescriptorSizeMin ) {␊ |
261 | //printf("Got an error %x %x %x\n", bb.flags.cf,␊ |
262 | // bb.eax.rx, bb.ecx.rx);␊ |
263 | break;␊ |
264 | }␊ |
265 | ␊ |
266 | // Tally up the conventional/extended memory sizes.␊ |
267 | ␊ |
268 | if ( range->type == kMemoryRangeUsable ||␊ |
269 | range->type == kMemoryRangeACPI ||␊ |
270 | range->type == kMemoryRangeNVS )␊ |
271 | {␊ |
272 | // Tally the conventional memory ranges.␊ |
273 | if ( range->base + range->length <= 0xa0000 ) {␊ |
274 | conMemSize += range->length;␊ |
275 | } ␊ |
276 | ␊ |
277 | // Record the top of extended memory.␊ |
278 | if ( range->base >= EXTENDED_ADDR ) {␊ |
279 | extMemSize += range->length;␊ |
280 | }␊ |
281 | }␊ |
282 | ␊ |
283 | range++;␊ |
284 | count++;␊ |
285 | ␊ |
286 | // Is this the last address range?␊ |
287 | ␊ |
288 | if ( bb.ebx.rx == 0 ) {␊ |
289 | //printf("last range\n");␊ |
290 | break;␊ |
291 | }␊ |
292 | }␊ |
293 | *conMemSizePtr = conMemSize / 1024; // size in KB␊ |
294 | *extMemSizePtr = extMemSize / 1024; // size in KB␊ |
295 | ␊ |
296 | #if 0␊ |
297 | rerangedCount = rerangeMemoryMap(count);␊ |
298 | range += rerangedCount - count;␊ |
299 | #endif␊ |
300 | ␊ |
301 | // Copy out data␊ |
302 | bcopy((char *)BIOS_ADDR, rangeArray, ((char *)range - (char *)BIOS_ADDR));␊ |
303 | ␉␊ |
304 | #if DEBUG_BIOS␊ |
305 | {␊ |
306 | int i;␊ |
307 | printf("%d total ranges\n", count);getc();␊ |
308 | for (i=0, range = rangeArray; i<count; i++, range++) {␊ |
309 | printf("range: type %d, base 0x%x, length 0x%x\n",␊ |
310 | range->type, (unsigned int)range->base, (unsigned int)range->length); ␊ |
311 | }␊ |
312 | ␉␉//getc();␊ |
313 | }␊ |
314 | #endif␊ |
315 | ␊ |
316 | return count;␊ |
317 | }␊ |
318 | ␊ |
319 | unsigned long getExtendedMemorySize(void)␊ |
320 | {␊ |
321 | // Get extended memory size for large configurations. Not used unless␊ |
322 | // the INT15, E820H call (Get System Address Map) failed.␊ |
323 | //␊ |
324 | // Input:␊ |
325 | //␊ |
326 | // AX Function Code E801h␊ |
327 | //␊ |
328 | // Outputs:␊ |
329 | //␊ |
330 | // CF Carry Flag Carry cleared indicates no error.␊ |
331 | // AX Extended 1 Number of contiguous KB between 1 and 16 MB,␊ |
332 | // maximum 0x3C00 = 15 MB.␊ |
333 | // BX Extended 2 Number of contiguous 64 KB blocks between␊ |
334 | // 16 MB and 4 GB.␊ |
335 | // CX Configured 1 Number of contiguous KB between 1 and 16 MB,␊ |
336 | // maximum 0x3C00 = 15 MB.␊ |
337 | // DX Configured 2 Number of contiguous 64 KB blocks between␊ |
338 | // 16 MB and 4 GB.␊ |
339 | ␊ |
340 | bb.intno = 0x15;␊ |
341 | bb.eax.rx = 0xe801;␊ |
342 | bios(&bb);␊ |
343 | ␊ |
344 | // Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
345 | ␊ |
346 | if ( bb.flags.cf == 0 ) return (bb.ebx.rr * 64 + bb.eax.rr);␊ |
347 | ␊ |
348 | // Get Extended memory size. Called on last resort since the return␊ |
349 | // value is limited to 16-bits (a little less than 64MB max). May␊ |
350 | // not be supported by modern BIOSes.␊ |
351 | //␊ |
352 | // Input:␊ |
353 | //␊ |
354 | // AX Function Code E801h␊ |
355 | //␊ |
356 | // Outputs:␊ |
357 | //␊ |
358 | // CF Carry Flag Carry cleared indicates no error.␊ |
359 | // AX Memory Count Number of contiguous KB above 1MB.␊ |
360 | ␊ |
361 | bb.intno = 0x15;␊ |
362 | bb.eax.rx = 0x88;␊ |
363 | bios(&bb);␊ |
364 | ␊ |
365 | // Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
366 | ␊ |
367 | return bb.flags.cf ? 0 : bb.eax.rr;␊ |
368 | }␊ |
369 | ␊ |
370 | unsigned long getConventionalMemorySize(void)␊ |
371 | {␊ |
372 | bb.intno = 0x12;␊ |
373 | bios(&bb);␊ |
374 | return bb.eax.rr; // kilobytes␊ |
375 | }␊ |
376 | ␊ |
377 | void video_mode(int mode)␊ |
378 | {␊ |
379 | bb.intno = 0x10;␊ |
380 | bb.eax.r.h = 0x00;␊ |
381 | bb.eax.r.l = mode;␊ |
382 | bios(&bb);␊ |
383 | }␊ |
384 | ␊ |
385 | int biosread(int dev, int cyl, int head, int sec, int num)␊ |
386 | {␊ |
387 | int i;␊ |
388 | ␊ |
389 | bb.intno = 0x13;␊ |
390 | sec += 1; /* sector numbers start at 1 */␊ |
391 | ␊ |
392 | for (i=0;;) {␊ |
393 | bb.ecx.r.h = cyl;␊ |
394 | bb.ecx.r.l = ((cyl & 0x300) >> 2) | (sec & 0x3F);␊ |
395 | bb.edx.r.h = head;␊ |
396 | bb.edx.r.l = dev;␊ |
397 | bb.eax.r.l = num;␊ |
398 | bb.ebx.rr = OFFSET(ptov(BIOS_ADDR));␊ |
399 | bb.es = SEGMENT(ptov(BIOS_ADDR));␊ |
400 | ␊ |
401 | bb.eax.r.h = 0x02;␊ |
402 | bios(&bb);␊ |
403 | ␊ |
404 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
405 | if (bb.flags.cf == 0)␊ |
406 | bb.eax.r.h = 0;␊ |
407 | ␊ |
408 | /* Now we can really check for the return code (AH) value. */␊ |
409 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
410 | break;␊ |
411 | ␊ |
412 | /* reset disk subsystem and try again */␊ |
413 | bb.eax.r.h = 0x00;␊ |
414 | bios(&bb);␊ |
415 | }␊ |
416 | return bb.eax.r.h;␊ |
417 | }␊ |
418 | ␊ |
419 | int ebiosread(int dev, unsigned long long sec, int count)␊ |
420 | {␊ |
421 | int i;␊ |
422 | static struct {␊ |
423 | unsigned char size;␊ |
424 | unsigned char reserved;␊ |
425 | unsigned char numblocks;␊ |
426 | unsigned char reserved2;␊ |
427 | unsigned short bufferOffset;␊ |
428 | unsigned short bufferSegment;␊ |
429 | unsigned long long startblock;␊ |
430 | } addrpacket __attribute__((aligned(16))) = {0};␊ |
431 | addrpacket.size = sizeof(addrpacket);␊ |
432 | ␊ |
433 | for (i=0;;) {␊ |
434 | bb.intno = 0x13;␊ |
435 | bb.eax.r.h = 0x42;␊ |
436 | bb.edx.r.l = dev;␊ |
437 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
438 | bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
439 | addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
440 | addrpacket.numblocks = count;␊ |
441 | addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
442 | addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
443 | addrpacket.startblock = sec;␊ |
444 | bios(&bb);␊ |
445 | ␊ |
446 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
447 | if (bb.flags.cf == 0)␊ |
448 | bb.eax.r.h = 0;␊ |
449 | ␊ |
450 | /* Now we can really check for the return code (AH) value. */␊ |
451 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
452 | break;␊ |
453 | ␊ |
454 | /* reset disk subsystem and try again */␊ |
455 | bb.eax.r.h = 0x00;␊ |
456 | bios(&bb);␊ |
457 | }␊ |
458 | return bb.eax.r.h;␊ |
459 | }␊ |
460 | ␊ |
461 | int ebioswrite(int dev, long sec, int count)␊ |
462 | {␊ |
463 | int i;␊ |
464 | static struct {␊ |
465 | unsigned char size;␊ |
466 | unsigned char reserved;␊ |
467 | unsigned char numblocks;␊ |
468 | unsigned char reserved2;␊ |
469 | unsigned short bufferOffset;␊ |
470 | unsigned short bufferSegment;␊ |
471 | unsigned long long startblock;␊ |
472 | } addrpacket __attribute__((aligned(16))) = {0};␊ |
473 | addrpacket.size = sizeof(addrpacket);␊ |
474 | ␊ |
475 | for (i=0;;) {␊ |
476 | bb.intno = 0x13;␊ |
477 | bb.eax.r.l = 0; /* Don't verify */␊ |
478 | bb.eax.r.h = 0x43;␊ |
479 | bb.edx.r.l = dev;␊ |
480 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
481 | bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
482 | addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
483 | addrpacket.numblocks = count;␊ |
484 | addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
485 | addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
486 | addrpacket.startblock = sec;␊ |
487 | bios(&bb);␊ |
488 | ␊ |
489 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
490 | if (bb.flags.cf == 0)␊ |
491 | bb.eax.r.h = 0;␊ |
492 | ␊ |
493 | /* Now we can really check for the return code (AH) value. */␊ |
494 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
495 | break;␊ |
496 | ␊ |
497 | /* reset disk subsystem and try again */␊ |
498 | bb.eax.r.h = 0x00;␊ |
499 | bios(&bb);␊ |
500 | }␊ |
501 | return bb.eax.r.h;␊ |
502 | }␊ |
503 | ␊ |
504 | void putc(int ch)␊ |
505 | {␊ |
506 | bb.intno = 0x10;␊ |
507 | bb.ebx.r.h = 0x00; /* background black */␊ |
508 | bb.ebx.r.l = 0x0F; /* foreground white */␊ |
509 | bb.eax.r.h = 0x0e;␊ |
510 | bb.eax.r.l = ch;␊ |
511 | bios(&bb);␊ |
512 | }␊ |
513 | ␊ |
514 | void putca(int ch, int attr, int repeat)␊ |
515 | {␊ |
516 | bb.intno = 0x10;␊ |
517 | bb.ebx.r.h = 0x00; /* page number */␊ |
518 | bb.ebx.r.l = attr; /* attribute */␊ |
519 | bb.eax.r.h = 0x9;␊ |
520 | bb.eax.r.l = ch;␊ |
521 | bb.ecx.rx = repeat; /* repeat count */ ␊ |
522 | bios(&bb);␊ |
523 | }␊ |
524 | ␊ |
525 | /* Check to see if the passed-in drive is in El Torito no-emulation mode. */␊ |
526 | int is_no_emulation(int drive)␊ |
527 | {␊ |
528 | struct packet {␊ |
529 | ␉unsigned char packet_size;␊ |
530 | ␉unsigned char media_type;␊ |
531 | ␉unsigned char drive_num;␊ |
532 | ␉unsigned char ctrlr_index;␊ |
533 | ␉unsigned long lba;␊ |
534 | ␉unsigned short device_spec;␊ |
535 | ␉unsigned short buffer_segment;␊ |
536 | ␉unsigned short load_segment;␊ |
537 | ␉unsigned short sector_count;␊ |
538 | ␉unsigned char cyl_count;␊ |
539 | ␉unsigned char sec_count;␊ |
540 | ␉unsigned char head_count;␊ |
541 | ␉unsigned char reseved;␊ |
542 | } __attribute__((packed));␊ |
543 | static struct packet pkt;␊ |
544 | ␊ |
545 | bzero(&pkt, sizeof(pkt));␊ |
546 | pkt.packet_size = 0x13;␊ |
547 | ␊ |
548 | bb.intno = 0x13;␊ |
549 | bb.eax.r.h = 0x4b;␊ |
550 | bb.eax.r.l = 0x01; // subfunc: get info␊ |
551 | bb.edx.r.l = drive;␊ |
552 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&pkt);␊ |
553 | bb.ds = NORMALIZED_SEGMENT((unsigned)&pkt);␊ |
554 | ␊ |
555 | bios(&bb);␊ |
556 | #if DEBUG_BIOS␊ |
557 | printf("el_torito info drive %x\n", drive);␊ |
558 | ␊ |
559 | printf("--> cf %x, eax %x\n", bb.flags.cf, bb.eax.rr);␊ |
560 | ␊ |
561 | printf("pkt_size: %x\n", pkt.packet_size);␊ |
562 | printf("media_type: %x\n", pkt.media_type);␊ |
563 | printf("drive_num: %x\n", pkt.drive_num);␊ |
564 | printf("device_spec: %x\n", pkt.device_spec);␊ |
565 | printf("press a key->\n");getc();␊ |
566 | #endif␊ |
567 | ␊ |
568 | /* Some BIOSes erroneously return cf = 1 */␊ |
569 | /* Just check to see if the drive number is the same. */␊ |
570 | if (pkt.drive_num == drive) {␊ |
571 | ␉if ((pkt.media_type & 0x0F) == 0) {␊ |
572 | ␉ /* We are in no-emulation mode. */␊ |
573 | ␉ return 1;␊ |
574 | ␉}␊ |
575 | }␊ |
576 | ␊ |
577 | return 0;␊ |
578 | }␊ |
579 | ␊ |
580 | #if DEBUG_BIOS␊ |
581 | /*␊ |
582 | * BIOS drive information.␊ |
583 | */␊ |
584 | static void print_drive_info(boot_drive_info_t *dp)␊ |
585 | {␊ |
586 | // printf("buf_size = %x\n", dp->params.buf_size);␊ |
587 | printf("info_flags = %x\n", dp->params.info_flags);␊ |
588 | printf(" phys_cyls = %lx\n", dp->params. phys_cyls);␊ |
589 | printf(" phys_heads = %lx\n", dp->params. phys_heads);␊ |
590 | printf(" phys_spt = %lx\n", dp->params. phys_spt);␊ |
591 | printf("phys_sectors = %lx%lx\n", ((unsigned long *)(&dp->params.phys_sectors))[1],␊ |
592 | ␉␉␉␉ ((unsigned long *)(&dp->params.phys_sectors))[0]);␊ |
593 | printf("phys_nbps = %x\n", dp->params.phys_nbps);␊ |
594 | // printf("dpte_offset = %x\n", dp->params.dpte_offset);␊ |
595 | // printf("dpte_segment = %x\n", dp->params.dpte_segment);␊ |
596 | // printf("key = %x\n", dp->params.key);␊ |
597 | // printf("path_len = %x\n", dp->params. path_len);␊ |
598 | // printf("reserved1 = %x\n", dp->params. reserved1);␊ |
599 | // printf("reserved2 = %x\n", dp->params.reserved2);␊ |
600 | //printf("bus_type[4] = %x\n", dp->params. bus_type[4]);␊ |
601 | //printf("interface_type[8] = %x\n", dp->params. interface_type[8]);␊ |
602 | //printf("interface_path[8] = %x\n", dp->params. interface_path[8]);␊ |
603 | //printf("dev_path[8] = %x\n", dp->params. dev_path[8]);␊ |
604 | // printf("reserved3 = %x\n", dp->params. reserved3);␊ |
605 | // printf("checksum = %x\n", dp->params. checksum);␊ |
606 | ␊ |
607 | printf(" io_port_base = %x\n", dp->dpte.io_port_base);␊ |
608 | printf(" control_port_base = %x\n", dp->dpte.control_port_base);␊ |
609 | printf(" head_flags = %x\n", dp->dpte. head_flags);␊ |
610 | printf(" vendor_info = %x\n", dp->dpte. vendor_info);␊ |
611 | printf(" irq = %x\n", dp->dpte. irq);␊ |
612 | // printf(" irq_unused = %x\n", dp->dpte. irq_unused);␊ |
613 | printf(" block_count = %x\n", dp->dpte. block_count);␊ |
614 | printf(" dma_channe = %x\n", dp->dpte. dma_channel);␊ |
615 | printf(" dma_type = %x\n", dp->dpte. dma_type);␊ |
616 | printf(" pio_type = %x\n", dp->dpte. pio_type);␊ |
617 | printf(" pio_unused = %x\n", dp->dpte. pio_unused);␊ |
618 | printf(" option_flags = %x\n", dp->dpte.option_flags);␊ |
619 | // printf(" reserved = %x\n", dp->dpte.reserved);␊ |
620 | printf(" revision = %x\n", dp->dpte. revision);␊ |
621 | // printf(" checksum = %x\n", dp->dpte. checksum);␊ |
622 | }␊ |
623 | ␊ |
624 | #endif␊ |
625 | ␊ |
626 | int get_drive_info(int drive, struct driveInfo *dp)␊ |
627 | {␊ |
628 | boot_drive_info_t *di = &dp->di;␊ |
629 | int ret = 0;␊ |
630 | ␊ |
631 | #if UNUSED␊ |
632 | if (maxhd == 0) {␊ |
633 | bb.intno = 0x13;␊ |
634 | bb.eax.r.h = 0x08;␊ |
635 | bb.edx.r.l = 0x80;␊ |
636 | bios(&bb);␊ |
637 | if (bb.flags.cf == 0)␊ |
638 | maxhd = 0x7f + bb.edx.r.l;␊ |
639 | };␊ |
640 | ␊ |
641 | if (drive > maxhd)␊ |
642 | return 0;␊ |
643 | #endif␊ |
644 | ␊ |
645 | bzero(dp, sizeof(struct driveInfo));␊ |
646 | dp->biosdev = drive;␊ |
647 | ␊ |
648 | /* Check for El Torito no-emulation mode. */␊ |
649 | dp->no_emulation = is_no_emulation(drive);␊ |
650 | ␊ |
651 | /* Check drive for EBIOS support. */␊ |
652 | bb.intno = 0x13;␊ |
653 | bb.eax.r.h = 0x41;␊ |
654 | bb.edx.r.l = drive;␊ |
655 | bb.ebx.rr = 0x55aa;␊ |
656 | bios(&bb);␊ |
657 | if((bb.ebx.rr == 0xaa55) && (bb.flags.cf == 0)) {␊ |
658 | /* Get flags for supported operations. */␊ |
659 | dp->uses_ebios = bb.ecx.r.l;␊ |
660 | }␊ |
661 | ␊ |
662 | if (dp->uses_ebios & (EBIOS_ENHANCED_DRIVE_INFO | EBIOS_LOCKING_ACCESS | EBIOS_FIXED_DISK_ACCESS)) {␊ |
663 | /* Get EBIOS drive info. */␊ |
664 | ␉static struct drive_params params;␊ |
665 | ␊ |
666 | params.buf_size = sizeof(params);␊ |
667 | bb.intno = 0x13;␊ |
668 | bb.eax.r.h = 0x48;␊ |
669 | bb.edx.r.l = drive;␊ |
670 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)¶ms);␊ |
671 | bb.ds = NORMALIZED_SEGMENT((unsigned)¶ms);␊ |
672 | bios(&bb);␊ |
673 | if(bb.flags.cf != 0 /* || params.phys_sectors < 2097152 */) {␊ |
674 | dp->uses_ebios = 0;␊ |
675 | ␉ di->params.buf_size = 1;␊ |
676 | } else {␊ |
677 | ␉ bcopy(¶ms, &di->params, sizeof(params));␊ |
678 | ␊ |
679 | ␉ if (drive >= BASE_HD_DRIVE &&␊ |
680 | ␉␉ (dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) &&␊ |
681 | ␉␉ di->params.buf_size >= 30 &&␊ |
682 | ␉␉ !(di->params.dpte_offset == 0xFFFF && di->params.dpte_segment == 0xFFFF)) {␊ |
683 | ␉␉void *ptr = (void *)(di->params.dpte_offset + ((unsigned int)di->params.dpte_segment << 4));␊ |
684 | ␉␉bcopy(ptr, &di->dpte, sizeof(di->dpte));␊ |
685 | ␉ }␊ |
686 | ␉}␊ |
687 | }␊ |
688 | ␊ |
689 | /*␊ |
690 | * zef: This code will fail on recent JMicron and Intel option ROMs␊ |
691 | */ ␊ |
692 | // if (di->params.phys_heads == 0 || di->params.phys_spt == 0) {␊ |
693 | //␉/* Either it's not EBIOS, or EBIOS didn't tell us. */␊ |
694 | //␉bb.intno = 0x13;␊ |
695 | //␉bb.eax.r.h = 0x08;␊ |
696 | //␉bb.edx.r.l = drive;␊ |
697 | //␉bios(&bb);␊ |
698 | //␉if (bb.flags.cf == 0 && bb.eax.r.h == 0) {␊ |
699 | //␉ unsigned long cyl;␊ |
700 | //␉ unsigned long sec;␊ |
701 | //␉ unsigned long hds;␊ |
702 | //␊ |
703 | //␉ hds = bb.edx.r.h;␊ |
704 | //␉ sec = bb.ecx.r.l & 0x3F;␊ |
705 | //␉ if((dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) && (sec != 0)) {␊ |
706 | //␉␉cyl = (di->params.phys_sectors / ((hds + 1) * sec)) - 1;␊ |
707 | //␉ }␊ |
708 | //␉ else {␊ |
709 | //␉␉cyl = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
710 | //␉ }␊ |
711 | //␉ di->params.phys_heads = hds; ␊ |
712 | //␉ di->params.phys_spt = sec;␊ |
713 | //␉ di->params.phys_cyls = cyl;␊ |
714 | //␉} else {␊ |
715 | //␉ ret = -1;␊ |
716 | //␉}␊ |
717 | // }␊ |
718 | ␊ |
719 | if (dp->no_emulation) {␊ |
720 | /* Some BIOSes give us erroneous EBIOS support information.␊ |
721 | ␉ * Assume that if you're on a CD, then you can use␊ |
722 | ␉ * EBIOS disk calls.␊ |
723 | ␉ */␊ |
724 | dp->uses_ebios |= EBIOS_FIXED_DISK_ACCESS;␊ |
725 | }␊ |
726 | #if DEBUG_BIOS␊ |
727 | print_drive_info(di);␊ |
728 | printf("uses_ebios = 0x%x\n", dp->uses_ebios);␊ |
729 | printf("result %d\n", ret);␊ |
730 | printf("press a key->\n");getc();␊ |
731 | #endif␊ |
732 | ␊ |
733 | if (ret == 0) {␊ |
734 | ␉ dp->valid = 1;␊ |
735 | }␊ |
736 | return ret;␊ |
737 | }␊ |
738 | ␊ |
739 | int ebiosEjectMedia(int biosdev)␊ |
740 | {␊ |
741 | bb.intno = 0x13;␊ |
742 | bb.eax.r.h = 0x46;␊ |
743 | bb.eax.r.l = 0;␊ |
744 | bb.edx.rx = biosdev;␊ |
745 | bios(&bb);␊ |
746 | return bb.eax.r.h;␊ |
747 | }␊ |
748 | ␊ |
749 | void setCursorPosition(int x, int y, int page)␊ |
750 | {␊ |
751 | bb.intno = 0x10;␊ |
752 | bb.eax.r.h = 0x02;␊ |
753 | bb.ebx.r.h = page; /* page 0 for graphics */␊ |
754 | bb.edx.r.l = x;␊ |
755 | bb.edx.r.h = y;␊ |
756 | bios(&bb);␊ |
757 | }␊ |
758 | ␊ |
759 | void setCursorType(int type)␊ |
760 | {␊ |
761 | bb.intno = 0x10;␊ |
762 | bb.eax.r.h = 0x01;␊ |
763 | bb.ecx.rr = type;␊ |
764 | bios(&bb);␊ |
765 | }␊ |
766 | ␊ |
767 | void getCursorPositionAndType(int * x, int * y, int * type)␊ |
768 | {␊ |
769 | bb.intno = 0x10;␊ |
770 | bb.eax.r.h = 0x03;␊ |
771 | bios(&bb);␊ |
772 | *x = bb.edx.r.l;␊ |
773 | *y = bb.edx.r.h;␊ |
774 | *type = bb.ecx.rr;␊ |
775 | }␊ |
776 | ␊ |
777 | void scollPage(int x1, int y1, int x2, int y2, int attr, int rows, int dir)␊ |
778 | {␊ |
779 | bb.intno = 0x10;␊ |
780 | bb.eax.r.h = (dir > 0) ? 0x06 : 0x07;␊ |
781 | bb.eax.r.l = rows;␊ |
782 | bb.ebx.r.h = attr;␊ |
783 | bb.ecx.r.h = y1;␊ |
784 | bb.ecx.r.l = x1;␊ |
785 | bb.edx.r.h = y2;␊ |
786 | bb.edx.r.l = x2;␊ |
787 | bios(&bb);␊ |
788 | }␊ |
789 | ␊ |
790 | void clearScreenRows( int y1, int y2 )␊ |
791 | {␊ |
792 | scollPage( 0, y1, 80 - 1, y2, 0x07, y2 - y1 + 1, 1 );␊ |
793 | }␊ |
794 | ␊ |
795 | void setActiveDisplayPage( int page )␊ |
796 | {␊ |
797 | bb.intno = 0x10;␊ |
798 | bb.eax.r.h = 5;␊ |
799 | bb.eax.r.l = page;␊ |
800 | bios(&bb);␊ |
801 | }␊ |
802 | ␊ |
803 | #if DEBUG_BIOS␊ |
804 | ␊ |
805 | static int terminateDiskEmulation(void)␊ |
806 | {␊ |
807 | static char cd_spec[0x13];␊ |
808 | ␊ |
809 | bb.intno = 0x13;␊ |
810 | bb.eax.r.h = 0x4b;␊ |
811 | bb.eax.r.l = 0; // subfunc: terminate emulation ␊ |
812 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&cd_spec);␊ |
813 | bb.ds = NORMALIZED_SEGMENT((unsigned)&cd_spec);␊ |
814 | bios(&bb);␊ |
815 | return bb.eax.r.h;␊ |
816 | }␊ |
817 | ␊ |
818 | static int readDriveParameters(int drive, struct driveParameters *dp)␊ |
819 | {␊ |
820 | bb.intno = 0x13;␊ |
821 | bb.edx.r.l = drive;␊ |
822 | bb.eax.r.h = 0x08;␊ |
823 | bios(&bb);␊ |
824 | if (bb.eax.r.h == 0) {␊ |
825 | dp->heads = bb.edx.r.h;␊ |
826 | dp->sectors = bb.ecx.r.l & 0x3F;␊ |
827 | dp->cylinders = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
828 | dp->totalDrives = bb.edx.r.l;␊ |
829 | } else {␊ |
830 | bzero(dp, sizeof(*dp));␊ |
831 | }␊ |
832 | return bb.eax.r.h;␊ |
833 | ␊ |
834 | }␊ |
835 | #endif␊ |
836 | ␊ |
837 | #ifdef APM_SUPPORT␊ |
838 | ␊ |
839 | #define APM_INTNO 0x15␊ |
840 | #define APM_INTCODE 0x53␊ |
841 | ␊ |
842 | int␊ |
843 | APMPresent(void)␊ |
844 | {␊ |
845 | bb.intno = APM_INTNO;␊ |
846 | bb.eax.r.h = APM_INTCODE;␊ |
847 | bb.eax.r.l = 0x00;␊ |
848 | bb.ebx.rr = 0x0000;␊ |
849 | bios(&bb);␊ |
850 | if ((bb.flags.cf == 0) &&␊ |
851 | (bb.ebx.r.h == 'P') &&␊ |
852 | (bb.ebx.r.l == 'M')) {␊ |
853 | /* Success */␊ |
854 | bootArgs->apmConfig.major_vers = bb.eax.r.h;␊ |
855 | bootArgs->apmConfig.minor_vers = bb.eax.r.l;␊ |
856 | bootArgs->apmConfig.flags.data = bb.ecx.rr;␊ |
857 | return 1;␊ |
858 | }␊ |
859 | return 0;␊ |
860 | }␊ |
861 | ␊ |
862 | int␊ |
863 | APMConnect32(void)␊ |
864 | {␊ |
865 | bb.intno = APM_INTNO;␊ |
866 | bb.eax.r.h = APM_INTCODE;␊ |
867 | bb.eax.r.l = 0x03;␊ |
868 | bb.ebx.rr = 0x0000;␊ |
869 | bios(&bb);␊ |
870 | if (bb.flags.cf == 0) {␊ |
871 | /* Success */␊ |
872 | bootArgs->apmConfig.cs32_base = (bb.eax.rr) << 4;␊ |
873 | bootArgs->apmConfig.entry_offset = bb.ebx.rx;␊ |
874 | bootArgs->apmConfig.cs16_base = (bb.ecx.rr) << 4;␊ |
875 | bootArgs->apmConfig.ds_base = (bb.edx.rr) << 4;␊ |
876 | if (bootArgs->apmConfig.major_vers >= 1 &&␊ |
877 | bootArgs->apmConfig.minor_vers >= 1) {␊ |
878 | bootArgs->apmConfig.cs_length = bb.esi.rr;␊ |
879 | bootArgs->apmConfig.ds_length = bb.edi.rr;␊ |
880 | } else {␊ |
881 | bootArgs->apmConfig.cs_length = ␊ |
882 | bootArgs->apmConfig.ds_length = 64 * 1024;␊ |
883 | }␊ |
884 | bootArgs->apmConfig.connected = 1;␊ |
885 | return 1;␊ |
886 | }␊ |
887 | return 0;␊ |
888 | }␊ |
889 | ␊ |
890 | #endif /* APM_SUPPORT */␊ |
891 | ␊ |
892 | #ifdef EISA_SUPPORT␊ |
893 | bool eisa_present(void)␊ |
894 | {␊ |
895 | static bool checked = false;␊ |
896 | static bool isEISA;␊ |
897 | ␊ |
898 | if (!checked) {␊ |
899 | if (strncmp((char *)0xfffd9, "EISA", 4) == 0)␊ |
900 | isEISA = true;␊ |
901 | ␊ |
902 | checked = true;␊ |
903 | }␊ |
904 | ␊ |
905 | return (isEISA);␊ |
906 | }␊ |
907 | ␊ |
908 | int␊ |
909 | ReadEISASlotInfo(EISA_slot_info_t *ep, int slot)␊ |
910 | {␊ |
911 | union {␊ |
912 | struct {␊ |
913 | unsigned char char2h :2;␊ |
914 | unsigned char char1 :5;␊ |
915 | unsigned char char3 :5;␊ |
916 | unsigned char char2l :3;␊ |
917 | unsigned char d2 :4;␊ |
918 | unsigned char d1 :4;␊ |
919 | unsigned char d4 :4;␊ |
920 | unsigned char d3 :4;␊ |
921 | } s;␊ |
922 | unsigned char data[4];␊ |
923 | } u;␊ |
924 | static char hex[0x10] = "0123456789ABCDEF";␊ |
925 | ␊ |
926 | ␊ |
927 | bb.intno = 0x15;␊ |
928 | bb.eax.r.h = 0xd8;␊ |
929 | bb.eax.r.l = 0x00;␊ |
930 | bb.ecx.r.l = slot;␊ |
931 | bios(&bb);␊ |
932 | if (bb.flags.cf)␊ |
933 | return bb.eax.r.h;␊ |
934 | ep->u_ID.d = bb.eax.r.l;␊ |
935 | ep->configMajor = bb.ebx.r.h;␊ |
936 | ep->configMinor = bb.ebx.r.l;␊ |
937 | ep->checksum = bb.ecx.rr;␊ |
938 | ep->numFunctions = bb.edx.r.h;␊ |
939 | ep->u_resources.d = bb.edx.r.l;␊ |
940 | u.data[0] = bb.edi.r.l;␊ |
941 | u.data[1] = bb.edi.r.h;␊ |
942 | u.data[2] = bb.esi.r.l;␊ |
943 | u.data[3] = bb.esi.r.h;␊ |
944 | ep->id[0] = u.s.char1 + ('A' - 1);␊ |
945 | ep->id[1] = (u.s.char2l | (u.s.char2h << 3)) + ('A' - 1);␊ |
946 | ep->id[2] = u.s.char3 + ('A' - 1);␊ |
947 | ep->id[3] = hex[u.s.d1];␊ |
948 | ep->id[4] = hex[u.s.d2];␊ |
949 | ep->id[5] = hex[u.s.d3];␊ |
950 | ep->id[6] = hex[u.s.d4];␊ |
951 | ep->id[7] = 0;␊ |
952 | return 0;␊ |
953 | }␊ |
954 | ␊ |
955 | /*␊ |
956 | * Note: ep must point to an address below 64k.␊ |
957 | */␊ |
958 | ␊ |
959 | int␊ |
960 | ReadEISAFuncInfo(EISA_func_info_t *ep, int slot, int function)␊ |
961 | {␊ |
962 | bb.intno = 0x15;␊ |
963 | bb.eax.r.h = 0xd8;␊ |
964 | bb.eax.r.l = 0x01;␊ |
965 | bb.ecx.r.l = slot;␊ |
966 | bb.ecx.r.h = function;␊ |
967 | bb.esi.rr = (unsigned int)ep->data;␊ |
968 | bios(&bb);␊ |
969 | if (bb.eax.r.h == 0) {␊ |
970 | ep->slot = slot;␊ |
971 | ep->function = function;␊ |
972 | }␊ |
973 | return bb.eax.r.h;␊ |
974 | }␊ |
975 | #endif /* EISA_SUPPORT */␊ |
976 | ␊ |
977 | ␊ |
978 | #if UNUSED␊ |
979 | #define PCI_SIGNATURE 0x20494350 /* "PCI " */␊ |
980 | ␊ |
981 | int␊ |
982 | ReadPCIBusInfo(PCI_bus_info_t *pp)␊ |
983 | {␊ |
984 | bb.intno = 0x1a;␊ |
985 | bb.eax.r.h = 0xb1;␊ |
986 | bb.eax.r.l = 0x01;␊ |
987 | bios(&bb);␊ |
988 | if ((bb.eax.r.h == 0) && (bb.edx.rx == PCI_SIGNATURE)) {␊ |
989 | pp->BIOSPresent = 1;␊ |
990 | pp->u_bus.d = bb.eax.r.l;␊ |
991 | pp->majorVersion = bb.ebx.r.h;␊ |
992 | pp->minorVersion = bb.ebx.r.l;␊ |
993 | pp->maxBusNum = bb.ecx.r.l;␊ |
994 | return 0;␊ |
995 | }␊ |
996 | return -1;␊ |
997 | }␊ |
998 | #endif␊ |
999 | ␊ |
1000 | void sleep(int n)␊ |
1001 | {␊ |
1002 | unsigned int endtime = (time18() + 18*n);␊ |
1003 | while (time18() < endtime);␊ |
1004 | }␊ |
1005 | ␊ |
1006 | void delay(int ms)␊ |
1007 | {␊ |
1008 | bb.intno = 0x15;␊ |
1009 | bb.eax.r.h = 0x86;␊ |
1010 | bb.ecx.rr = ms >> 16;␊ |
1011 | bb.edx.rr = ms & 0xFFFF;␊ |
1012 | bios(&bb);␊ |
1013 | }␊ |
1014 | ␊ |
1015 | |