[NTVDM]
[reactos.git] / reactos / subsystems / ntvdm / bios / bios32 / bios32.c
1 /*
2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
4 * FILE: bios32.c
5 * PURPOSE: VDM 32-bit BIOS
6 * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
7 */
8
9 /* INCLUDES *******************************************************************/
10
11 #define NDEBUG
12
13 /* For BIOS Version number */
14 #include <reactos/buildno.h>
15
16 #include "emulator.h"
17 #include "cpu/cpu.h" // for EMULATOR_FLAG_CF
18 #include "cpu/bop.h"
19 #include "int32.h"
20
21 #include "../bios.h"
22 #include "../rom.h"
23 #include "bios32.h"
24 #include "bios32p.h"
25 #include "kbdbios32.h"
26 #include "vidbios32.h"
27 #include "moubios32.h"
28
29 #include "io.h"
30 #include "hardware/cmos.h"
31 #include "hardware/pic.h"
32 #include "hardware/timer.h"
33
34 /* PRIVATE VARIABLES **********************************************************/
35
36 CALLBACK16 BiosContext;
37
38 /*
39
40 Bochs BIOS, see rombios.h
41 =========================
42
43 // model byte 0xFC = AT
44 #define SYS_MODEL_ID 0xFC
45 #define SYS_SUBMODEL_ID 0x00
46 #define BIOS_REVISION 1
47 #define BIOS_CONFIG_TABLE 0xe6f5
48
49 #ifndef BIOS_BUILD_DATE
50 # define BIOS_BUILD_DATE "06/23/99"
51 #endif
52
53 // 1K of base memory used for Extended Bios Data Area (EBDA)
54 // EBDA is used for PS/2 mouse support, and IDE BIOS, etc.
55 #define EBDA_SEG 0x9FC0
56 #define EBDA_SIZE 1 // In KiB
57 #define BASE_MEM_IN_K (640 - EBDA_SIZE)
58
59
60 See rombios.c
61 =============
62
63 ROM BIOS compatibility entry points:
64 ===================================
65 $e05b ; POST Entry Point
66 $e2c3 ; NMI Handler Entry Point
67 $e3fe ; INT 13h Fixed Disk Services Entry Point
68 $e401 ; Fixed Disk Parameter Table
69 $e6f2 ; INT 19h Boot Load Service Entry Point
70 $e6f5 ; Configuration Data Table
71 $e729 ; Baud Rate Generator Table
72 $e739 ; INT 14h Serial Communications Service Entry Point
73 $e82e ; INT 16h Keyboard Service Entry Point
74 $e987 ; INT 09h Keyboard Service Entry Point
75 $ec59 ; INT 13h Diskette Service Entry Point
76 $ef57 ; INT 0Eh Diskette Hardware ISR Entry Point
77 $efc7 ; Diskette Controller Parameter Table
78 $efd2 ; INT 17h Printer Service Entry Point
79 $f045 ; INT 10 Functions 0-Fh Entry Point
80 $f065 ; INT 10h Video Support Service Entry Point
81 $f0a4 ; MDA/CGA Video Parameter Table (INT 1Dh)
82 $f841 ; INT 12h Memory Size Service Entry Point
83 $f84d ; INT 11h Equipment List Service Entry Point
84 $f859 ; INT 15h System Services Entry Point
85 $fa6e ; Character Font for 320x200 & 640x200 Graphics (lower 128 characters)
86 $fe6e ; INT 1Ah Time-of-day Service Entry Point
87 $fea5 ; INT 08h System Timer ISR Entry Point
88 $fef3 ; Initial Interrupt Vector Offsets Loaded by POST
89 $ff53 ; IRET Instruction for Dummy Interrupt Handler
90 $ff54 ; INT 05h Print Screen Service Entry Point
91 $fff0 ; Power-up Entry Point
92 $fff5 ; ASCII Date ROM was built - 8 characters in MM/DD/YY
93 $fffe ; System Model ID
94
95 */
96
97 /*
98 * See Ralf Brown: http://www.ctyme.com/intr/rb-1594.htm#Table515
99 * for more information.
100 */
101 #define BIOS_MODEL 0xFC // PC-AT
102 #define BIOS_SUBMODEL 0x01 // AT models 319,339 8 MHz, Enh Keyb, 3.5"
103 #define BIOS_REVISION 0x00
104 // FIXME: Find a nice PS/2 486 + 487 BIOS combination!
105
106 /*
107 * WARNING! For compatibility purposes the string "IBM" should be at F000:E00E .
108 * Some programs alternatively look at "COPR. IBM" that is at F000:E008 .
109 */
110 static const CHAR BiosCopyright[] = "0000000 NTVDM IBM Compatible 486 32-bit BIOS Copyright (C) ReactOS Team 1996-2014";
111 static const CHAR BiosVersion[] = "ReactOS NTVDM 32-bit BIOS "KERNEL_VERSION_STR" (Build "KERNEL_VERSION_BUILD_STR")";
112 static const CHAR BiosDate[] = "06/17/13";
113
114 C_ASSERT(sizeof(BiosCopyright)-1 <= 0x5B); // Ensures that we won't overflow on the POST Code starting at F000:E05B
115 C_ASSERT(sizeof(BiosDate)-1 == 0x08);
116
117 /* 16-bit bootstrap code at F000:FFF0 */
118 static BYTE Bootstrap[] =
119 {
120 0xEA, // jmp far ptr
121 0x5B, 0xE0, 0x00, 0xF0, // F000:E05B
122 };
123
124 /*
125 * Normally at F000:E05B there is the POST that finally calls the bootstrap
126 * interrupt. It should also check the value of Bda->SoftReset. Since we do
127 * all the POST in 32 bit from the start, we just place there the bootstrap
128 * interrupt call.
129 */
130 static BYTE PostCode[] =
131 {
132 LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), BOP_RESET, // Call BIOS POST
133 0xCD, 0x19, // INT 0x19, the bootstrap loader interrupt
134 // LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), BOP_UNSIMULATE
135 };
136
137
138 /* PRIVATE FUNCTIONS **********************************************************/
139
140 static VOID WINAPI BiosException(LPWORD Stack)
141 {
142 /* Get the exception number and call the emulator API */
143 BYTE ExceptionNumber = LOBYTE(Stack[STACK_INT_NUM]);
144 EmulatorException(ExceptionNumber, Stack);
145 }
146
147 static VOID WINAPI BiosMiscService(LPWORD Stack)
148 {
149 switch (getAH())
150 {
151 /* Keyboard intercept */
152 case 0x4F:
153 {
154 /* CF should be set but let's just set it again just in case */
155 /* Do not modify AL (the hardware scan code), but set CF to continue processing */
156 // setCF(1);
157 Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
158 break;
159 }
160
161 /* Wait */
162 case 0x86:
163 {
164 /*
165 * Interval in microseconds in CX:DX
166 * See Ralf Brown: http://www.ctyme.com/intr/rb-1525.htm
167 * for more information.
168 */
169 Sleep(MAKELONG(getDX(), getCX()));
170
171 /* Clear CF */
172 Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
173
174 break;
175 }
176
177 /* Copy Extended Memory */
178 case 0x87:
179 {
180 DWORD Count = (DWORD)getCX() * 2;
181 PFAST486_GDT_ENTRY Gdt = (PFAST486_GDT_ENTRY)SEG_OFF_TO_PTR(getES(), getSI());
182 DWORD SourceBase = Gdt[2].Base + (Gdt[2].BaseMid << 16) + (Gdt[2].BaseHigh << 24);
183 DWORD SourceLimit = Gdt[2].Limit + (Gdt[2].LimitHigh << 16);
184 DWORD DestBase = Gdt[3].Base + (Gdt[3].BaseMid << 16) + (Gdt[3].BaseHigh << 24);
185 DWORD DestLimit = Gdt[3].Limit + (Gdt[3].LimitHigh << 16);
186
187 /* Check for flags */
188 if (Gdt[2].Granularity) SourceLimit = (SourceLimit << 12) | 0xFFF;
189 if (Gdt[3].Granularity) DestLimit = (DestLimit << 12) | 0xFFF;
190
191 if ((Count > SourceLimit) || (Count > DestLimit))
192 {
193 setAX(0x80);
194 Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
195
196 break;
197 }
198
199 /* Copy */
200 RtlMoveMemory((PVOID)((ULONG_PTR)BaseAddress + DestBase),
201 (PVOID)((ULONG_PTR)BaseAddress + SourceBase),
202 Count);
203
204 setAX(ERROR_SUCCESS);
205 Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
206 break;
207 }
208
209 /* Get Extended Memory Size */
210 case 0x88:
211 {
212 UCHAR Low, High;
213
214 /*
215 * Return the (usable) extended memory (after 1 MB)
216 * size in kB from CMOS.
217 */
218 IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_ACTUAL_EXT_MEMORY_LOW);
219 Low = IOReadB(CMOS_DATA_PORT);
220 IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_ACTUAL_EXT_MEMORY_HIGH);
221 High = IOReadB(CMOS_DATA_PORT);
222 setAX(MAKEWORD(Low, High));
223
224 /* Clear CF */
225 Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
226
227 break;
228 }
229
230 /* Get Configuration */
231 case 0xC0:
232 {
233 /* Return the BIOS ROM Configuration Table address in ES:BX */
234 // The BCT is found at F000:E6F5 for 100% compatible BIOSes.
235 setES(BIOS_SEGMENT);
236 setBX(0xE6F5);
237
238 /* Call successful; clear CF */
239 setAH(0x00);
240 Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
241
242 break;
243 }
244
245 /* Return Extended-Bios Data-Area Segment Address (PS) */
246 case 0xC1:
247 {
248 // Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
249 // setES(???);
250
251 /* We do not support EBDA yet */
252 Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
253
254 break;
255 }
256
257 /* Pointing Device BIOS Interface (PS) */
258 case 0xC2:
259 {
260 DPRINT1("INT 15h, AH = C2h must be implemented in order to support vendor mouse drivers\n");
261 break;
262 }
263
264 default:
265 {
266 DPRINT1("BIOS Function INT 15h, AH = 0x%02X NOT IMPLEMENTED\n",
267 getAH());
268 }
269 }
270 }
271
272 static VOID WINAPI BiosRomBasic(LPWORD Stack)
273 {
274 /* ROM Basic is unsupported, display a message to the user */
275 DisplayMessage(L"NTVDM doesn't support ROM Basic. The VDM is closing.");
276
277 /* Stop the VDM */
278 EmulatorTerminate();
279 return;
280 }
281
282
283 VOID DosBootsectorInitialize(VOID);
284
285 static VOID WINAPI BiosBootstrapLoader(LPWORD Stack)
286 {
287 /*
288 * In real BIOSes one loads the bootsector read from a diskette
289 * or from a disk, copy it to 0000:7C00 and then boot it.
290 * Since we are 32-bit VM and we hardcode our DOS at the moment,
291 * just call the DOS 32-bit initialization code.
292 */
293
294 DPRINT1("BiosBootstrapLoader -->\n");
295
296 /* Load DOS */
297 DosBootsectorInitialize();
298
299 /*
300 * Position CPU to 0000:7C00 to boot the OS.
301 *
302 * Since we are called via the INT32 mechanism, we need to correctly set
303 * CS:IP, not by changing the current one (otherwise the interrupt could
304 * not be clean up and return properly), but by changing the CS:IP in the
305 * stack, so that when the interrupt returns, the modified CS:IP is popped
306 * off the stack and the CPU is correctly repositioned.
307 */
308 Stack[STACK_CS] = 0x0000;
309 Stack[STACK_IP] = 0x7C00;
310
311 DPRINT1("<-- BiosBootstrapLoader\n");
312 }
313
314 static VOID WINAPI BiosTimeService(LPWORD Stack)
315 {
316 switch (getAH())
317 {
318 case 0x00:
319 {
320 /* Set AL to 1 if midnight had passed, 0 otherwise */
321 setAL(Bda->MidnightPassed ? 0x01 : 0x00);
322
323 /* Return the tick count in CX:DX */
324 setCX(HIWORD(Bda->TickCounter));
325 setDX(LOWORD(Bda->TickCounter));
326
327 /* Reset the midnight flag */
328 Bda->MidnightPassed = FALSE;
329
330 break;
331 }
332
333 case 0x01:
334 {
335 /* Set the tick count to CX:DX */
336 Bda->TickCounter = MAKELONG(getDX(), getCX());
337
338 /* Reset the midnight flag */
339 Bda->MidnightPassed = FALSE;
340
341 break;
342 }
343
344 default:
345 {
346 DPRINT1("BIOS Function INT 1Ah, AH = 0x%02X NOT IMPLEMENTED\n",
347 getAH());
348 }
349 }
350 }
351
352 static VOID WINAPI BiosSystemTimerInterrupt(LPWORD Stack)
353 {
354 /* Increase the system tick count */
355 Bda->TickCounter++;
356 }
357
358
359 // From SeaBIOS
360 static VOID PicSetIRQMask(USHORT off, USHORT on)
361 {
362 UCHAR pic1off = off, pic1on = on, pic2off = off>>8, pic2on = on>>8;
363 IOWriteB(PIC_MASTER_DATA, (IOReadB(PIC_MASTER_DATA) & ~pic1off) | pic1on);
364 IOWriteB(PIC_SLAVE_DATA , (IOReadB(PIC_SLAVE_DATA ) & ~pic2off) | pic2on);
365 }
366
367 // From SeaBIOS
368 VOID EnableHwIRQ(UCHAR hwirq, EMULATOR_INT32_PROC func)
369 {
370 UCHAR vector;
371
372 PicSetIRQMask(1 << hwirq, 0);
373 if (hwirq < 8)
374 vector = BIOS_PIC_MASTER_INT + hwirq;
375 else
376 vector = BIOS_PIC_SLAVE_INT + hwirq - 8;
377
378 RegisterBiosInt32(vector, func);
379 }
380
381
382 VOID PicIRQComplete(LPWORD Stack)
383 {
384 /* Get the interrupt number */
385 BYTE IntNum = LOBYTE(Stack[STACK_INT_NUM]);
386
387 /*
388 * If this was a PIC IRQ, send an End-of-Interrupt to the PIC.
389 */
390
391 if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
392 {
393 /* It was an IRQ from the master PIC */
394 IOWriteB(PIC_MASTER_CMD, PIC_OCW2_EOI);
395 }
396 else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
397 {
398 /* It was an IRQ from the slave PIC */
399 IOWriteB(PIC_SLAVE_CMD , PIC_OCW2_EOI);
400 IOWriteB(PIC_MASTER_CMD, PIC_OCW2_EOI);
401 }
402 }
403
404 static VOID WINAPI BiosHandleMasterPicIRQ(LPWORD Stack)
405 {
406 BYTE IrqNumber;
407
408 IOWriteB(PIC_MASTER_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
409 IrqNumber = IOReadB(PIC_MASTER_CMD);
410
411 DPRINT("Master - IrqNumber = 0x%02X\n", IrqNumber);
412
413 PicIRQComplete(Stack);
414 }
415
416 static VOID WINAPI BiosHandleSlavePicIRQ(LPWORD Stack)
417 {
418 BYTE IrqNumber;
419
420 IOWriteB(PIC_SLAVE_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
421 IrqNumber = IOReadB(PIC_SLAVE_CMD);
422
423 DPRINT("Slave - IrqNumber = 0x%02X\n", IrqNumber);
424
425 PicIRQComplete(Stack);
426 }
427
428 // Timer IRQ 0
429 static VOID WINAPI BiosTimerIrq(LPWORD Stack)
430 {
431 /*
432 * Perform the system timer interrupt.
433 *
434 * Do not call directly BiosSystemTimerInterrupt(Stack);
435 * because some programs may hook only BIOS_SYS_TIMER_INTERRUPT
436 * for their purpose...
437 */
438 /** EmulatorInterrupt(BIOS_SYS_TIMER_INTERRUPT); **/
439 Int32Call(&BiosContext, BIOS_SYS_TIMER_INTERRUPT);
440 PicIRQComplete(Stack);
441 }
442
443
444 static VOID BiosHwSetup(VOID)
445 {
446 /* Initialize the master and the slave PICs (cascade mode) */
447 IOWriteB(PIC_MASTER_CMD, PIC_ICW1 | PIC_ICW1_ICW4);
448 IOWriteB(PIC_SLAVE_CMD , PIC_ICW1 | PIC_ICW1_ICW4);
449
450 /*
451 * Set the interrupt vector offsets for each PIC
452 * (base IRQs: 0x08-0x0F for IRQ 0-7, 0x70-0x77 for IRQ 8-15)
453 */
454 IOWriteB(PIC_MASTER_DATA, BIOS_PIC_MASTER_INT);
455 IOWriteB(PIC_SLAVE_DATA , BIOS_PIC_SLAVE_INT );
456
457 /* Tell the master PIC that there is a slave PIC at IRQ 2 */
458 IOWriteB(PIC_MASTER_DATA, 1 << 2);
459 /* Tell the slave PIC its cascade identity */
460 IOWriteB(PIC_SLAVE_DATA , 2);
461
462 /* Make sure both PICs are in 8086 mode */
463 IOWriteB(PIC_MASTER_DATA, PIC_ICW4_8086);
464 IOWriteB(PIC_SLAVE_DATA , PIC_ICW4_8086);
465
466 /* Clear the masks for both PICs */
467 // IOWriteB(PIC_MASTER_DATA, 0x00);
468 // IOWriteB(PIC_SLAVE_DATA , 0x00);
469 /* Disable all IRQs */
470 IOWriteB(PIC_MASTER_DATA, 0xFF);
471 IOWriteB(PIC_SLAVE_DATA , 0xFF);
472
473
474 /* Initialize PIT Counter 0 */
475 IOWriteB(PIT_COMMAND_PORT, 0x34);
476 IOWriteB(PIT_DATA_PORT(0), 0x00);
477 IOWriteB(PIT_DATA_PORT(0), 0x00);
478
479 /* Initialize PIT Counter 1 */
480 IOWriteB(PIT_COMMAND_PORT, 0x74);
481 IOWriteB(PIT_DATA_PORT(1), 0x00);
482 IOWriteB(PIT_DATA_PORT(1), 0x00);
483
484 /* Initialize PIT Counter 2 */
485 IOWriteB(PIT_COMMAND_PORT, 0xB4);
486 IOWriteB(PIT_DATA_PORT(2), 0x00);
487 IOWriteB(PIT_DATA_PORT(2), 0x00);
488
489 EnableHwIRQ(0, BiosTimerIrq);
490 }
491
492 static VOID InitializeBiosInt32(VOID)
493 {
494 USHORT i;
495
496 /* Initialize the callback context */
497 InitializeContext(&BiosContext, BIOS_SEGMENT, 0x0000);
498
499 /* Register the default BIOS 32-bit Interrupts */
500 for (i = 0x00; i <= 0xFF; i++)
501 {
502 RegisterBiosInt32(i, NULL);
503 }
504
505 /* Initialize the exception vector interrupts to a default Exception handler */
506 for (i = 0; i < 8; i++)
507 RegisterBiosInt32(i, BiosException);
508
509 /* Initialize HW vector interrupts to a default HW handler */
510 for (i = BIOS_PIC_MASTER_INT; i < BIOS_PIC_MASTER_INT + 8; i++)
511 RegisterBiosInt32(i, BiosHandleMasterPicIRQ);
512 for (i = BIOS_PIC_SLAVE_INT ; i < BIOS_PIC_SLAVE_INT + 8; i++)
513 RegisterBiosInt32(i, BiosHandleSlavePicIRQ);
514
515 /* Initialize software vector handlers */
516 RegisterBiosInt32(BIOS_EQUIPMENT_INTERRUPT, BiosEquipmentService );
517 RegisterBiosInt32(BIOS_MEMORY_SIZE , BiosGetMemorySize );
518 RegisterBiosInt32(BIOS_MISC_INTERRUPT , BiosMiscService );
519 RegisterBiosInt32(BIOS_ROM_BASIC , BiosRomBasic );
520 RegisterBiosInt32(BIOS_BOOTSTRAP_LOADER , BiosBootstrapLoader );
521 RegisterBiosInt32(BIOS_TIME_INTERRUPT , BiosTimeService );
522 RegisterBiosInt32(BIOS_SYS_TIMER_INTERRUPT, BiosSystemTimerInterrupt);
523
524 /* Some interrupts are in fact addresses to tables */
525 ((PULONG)BaseAddress)[0x1E] = (ULONG)NULL;
526 ((PULONG)BaseAddress)[0x41] = (ULONG)NULL;
527 ((PULONG)BaseAddress)[0x46] = (ULONG)NULL;
528 ((PULONG)BaseAddress)[0x48] = (ULONG)NULL;
529 ((PULONG)BaseAddress)[0x49] = (ULONG)NULL;
530 }
531
532 static VOID InitializeBiosData(VOID)
533 {
534 UCHAR Low, High;
535
536 /* Initialize the BDA contents */
537 RtlZeroMemory(Bda, sizeof(*Bda));
538 Bda->EquipmentList = BIOS_EQUIPMENT_LIST;
539
540 /*
541 * Retrieve the conventional memory size
542 * in kB from CMOS, typically 640 kB.
543 */
544 IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_BASE_MEMORY_LOW);
545 Low = IOReadB(CMOS_DATA_PORT);
546 IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_BASE_MEMORY_HIGH);
547 High = IOReadB(CMOS_DATA_PORT);
548 Bda->MemorySize = MAKEWORD(Low, High);
549 }
550
551 static VOID InitializeBiosInfo(VOID)
552 {
553 RtlZeroMemory(Bct, sizeof(*Bct));
554
555 Bct->Length = sizeof(*Bct);
556 Bct->Model = BIOS_MODEL;
557 Bct->SubModel = BIOS_SUBMODEL;
558 Bct->Revision = BIOS_REVISION;
559 Bct->Feature[0] = 0x70; // At the moment we don't support "wait for external event (INT 15/AH=41h)", we also don't have any "extended BIOS area allocated (usually at top of RAM)"; see http://www.ctyme.com/intr/rb-1594.htm#Table510
560 Bct->Feature[1] = 0x00; // We don't support anything from here; see http://www.ctyme.com/intr/rb-1594.htm#Table511
561 Bct->Feature[2] = 0x00;
562 Bct->Feature[3] = 0x00;
563 Bct->Feature[4] = 0x00;
564 }
565
566
567
568 /*
569 * The BIOS POST (Power On-Self Test)
570 */
571 VOID
572 Bios32Post(VOID)
573 {
574 BOOLEAN Success;
575
576 DPRINT1("Bios32Post\n");
577
578 /* Initialize the stack */
579 // That's what says IBM... (stack at 30:00FF going downwards)
580 // setSS(0x0000);
581 // setSP(0x0400);
582 setSS(0x0050); // Stack at 50:0400, going downwards
583 setSP(0x0400);
584
585 /* Set data segment */
586 setDS(BDA_SEGMENT);
587
588 /* Initialize the BDA and the BIOS ROM Information */
589 InitializeBiosData();
590 InitializeBiosInfo();
591
592 /* Register the BIOS 32-bit Interrupts */
593 InitializeBiosInt32();
594
595 /* Initialize platform hardware (PIC/PIT chips, ...) */
596 BiosHwSetup();
597
598 /* Initialize the Keyboard, Video and Mouse BIOS */
599 if (!KbdBios32Initialize() || !VidBios32Initialize() || !MouseBios32Initialize())
600 {
601 // return FALSE;
602
603 /* Stop the VDM */
604 EmulatorTerminate();
605 return;
606 }
607
608 ///////////// MUST BE DONE AFTER IVT INITIALIZATION !! /////////////////////
609
610 /* Load some ROMs */
611 Success = LoadRom("boot.bin", (PVOID)0xE0000, NULL);
612 DPRINT1("Test ROM loading %s ; GetLastError() = %u\n", Success ? "succeeded" : "failed", GetLastError());
613
614 SearchAndInitRoms(&BiosContext);
615
616 /*
617 * End of the 32-bit POST portion. We then fall back into 16-bit where
618 * the rest of the POST code is executed, typically calling INT 19h
619 * to boot up the OS.
620 */
621 }
622
623 static VOID WINAPI Bios32ResetBop(LPWORD Stack)
624 {
625 DPRINT1("Bios32ResetBop\n");
626
627 /* Disable interrupts */
628 setIF(0);
629
630 // FIXME: Check the word at 0040h:0072h (Bda->SoftReset) and do one of the
631 // following actions:
632 // - if the word is 1234h, perform a warm reboot (aka. Ctrl-Alt-Del);
633 // - if the word is 0000h, perform a cold reboot (aka. Reset).
634
635 /* Initialize IVT and hardware */
636
637 /* Initialize the Keyboard and Video BIOS */
638 if (!KbdBiosInitialize() || !VidBiosInitialize())
639 {
640 /* Stop the VDM */
641 EmulatorTerminate();
642 return;
643 }
644
645 /* Do the POST */
646 Bios32Post();
647
648 /* Enable interrupts */
649 setIF(1);
650 }
651
652
653 /* PUBLIC FUNCTIONS ***********************************************************/
654
655 BOOLEAN Bios32Initialize(VOID)
656 {
657 /*
658 * Initialize BIOS32 static data
659 */
660
661 /* Bootstrap code */
662 RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE05B), PostCode , sizeof(PostCode ));
663 RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xFFF0), Bootstrap, sizeof(Bootstrap));
664
665 /* System BIOS Copyright */
666 RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE000), BiosCopyright, sizeof(BiosCopyright)-1);
667
668 /* System BIOS Version */
669 RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xE080), BiosVersion, sizeof(BiosVersion)-1);
670 // FIXME: or E061, or E100 ??
671
672 /* System BIOS Date */
673 RtlCopyMemory(SEG_OFF_TO_PTR(0xF000, 0xFFF5), BiosDate, sizeof(BiosDate)-1);
674
675 /* System BIOS Model (same as Bct->Model) */
676 *(PBYTE)(SEG_OFF_TO_PTR(0xF000, 0xFFFE)) = BIOS_MODEL;
677
678 /* Redefine our POST function */
679 RegisterBop(BOP_RESET, Bios32ResetBop);
680
681 /* We are done */
682 return TRUE;
683 }
684
685 VOID Bios32Cleanup(VOID)
686 {
687 MouseBios32Cleanup();
688 VidBios32Cleanup();
689 KbdBios32Cleanup();
690 }
691
692 /* EOF */