src/gba/gba.c (view raw)
1#include "gba.h"
2
3#include "gba-bios.h"
4#include "gba-io.h"
5#include "gba-sio.h"
6#include "gba-thread.h"
7
8#include "util/memory.h"
9
10#include <sys/stat.h>
11
12const uint32_t GBA_ARM7TDMI_FREQUENCY = 0x1000000;
13const uint32_t GBA_COMPONENT_MAGIC = 0x1000000;
14
15enum {
16 SP_BASE_SYSTEM = 0x03FFFF00,
17 SP_BASE_IRQ = 0x03FFFFA0,
18 SP_BASE_SUPERVISOR = 0x03FFFFE0
19};
20
21struct GBACartridgeOverride {
22 const char id[4];
23 enum SavedataType type;
24 int gpio;
25};
26
27static const struct GBACartridgeOverride _overrides[] = {
28 // Boktai: The Sun is in Your Hand
29 { "U3IE", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
30 { "U3IP", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
31
32 // Boktai 2: Solar Boy Django
33 { "U32E", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
34 { "U32P", SAVEDATA_EEPROM, GPIO_RTC | GPIO_LIGHT_SENSOR },
35
36 // Drill Dozer
37 { "V49J", SAVEDATA_SRAM, GPIO_RUMBLE },
38 { "V49E", SAVEDATA_SRAM, GPIO_RUMBLE },
39
40 // Pokemon Ruby
41 { "AXVJ", SAVEDATA_FLASH1M, GPIO_RTC },
42 { "AXVE", SAVEDATA_FLASH1M, GPIO_RTC },
43 { "AXVP", SAVEDATA_FLASH1M, GPIO_RTC },
44 { "AXVI", SAVEDATA_FLASH1M, GPIO_RTC },
45 { "AXVS", SAVEDATA_FLASH1M, GPIO_RTC },
46 { "AXVD", SAVEDATA_FLASH1M, GPIO_RTC },
47 { "AXVF", SAVEDATA_FLASH1M, GPIO_RTC },
48
49 // Pokemon Sapphire
50 { "AXPJ", SAVEDATA_FLASH1M, GPIO_RTC },
51 { "AXPE", SAVEDATA_FLASH1M, GPIO_RTC },
52 { "AXPP", SAVEDATA_FLASH1M, GPIO_RTC },
53 { "AXPI", SAVEDATA_FLASH1M, GPIO_RTC },
54 { "AXPS", SAVEDATA_FLASH1M, GPIO_RTC },
55 { "AXPD", SAVEDATA_FLASH1M, GPIO_RTC },
56 { "AXPF", SAVEDATA_FLASH1M, GPIO_RTC },
57
58 // Pokemon Emerald
59 { "BPEJ", SAVEDATA_FLASH1M, GPIO_RTC },
60 { "BPEE", SAVEDATA_FLASH1M, GPIO_RTC },
61 { "BPEP", SAVEDATA_FLASH1M, GPIO_RTC },
62 { "BPEI", SAVEDATA_FLASH1M, GPIO_RTC },
63 { "BPES", SAVEDATA_FLASH1M, GPIO_RTC },
64 { "BPED", SAVEDATA_FLASH1M, GPIO_RTC },
65 { "BPEF", SAVEDATA_FLASH1M, GPIO_RTC },
66
67 // Pokemon FireRed
68 { "BPRJ", SAVEDATA_FLASH1M, GPIO_NONE },
69 { "BPRE", SAVEDATA_FLASH1M, GPIO_NONE },
70 { "BPRP", SAVEDATA_FLASH1M, GPIO_NONE },
71
72 // Pokemon LeafGreen
73 { "BPGJ", SAVEDATA_FLASH1M, GPIO_NONE },
74 { "BPGE", SAVEDATA_FLASH1M, GPIO_NONE },
75 { "BPGP", SAVEDATA_FLASH1M, GPIO_NONE },
76
77 // RockMan EXE 4.5 - Real Operation
78 { "BR4J", SAVEDATA_FLASH512, GPIO_RTC },
79
80 // Super Mario Advance 4
81 { "AX4J", SAVEDATA_FLASH1M, GPIO_NONE },
82 { "AX4E", SAVEDATA_FLASH1M, GPIO_NONE },
83 { "AX4P", SAVEDATA_FLASH1M, GPIO_NONE },
84
85 // Wario Ware Twisted
86 { "RWZJ", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
87 { "RWZE", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
88 { "RWZP", SAVEDATA_SRAM, GPIO_RUMBLE | GPIO_GYRO },
89
90 { { 0, 0, 0, 0 }, 0, 0 }
91};
92
93static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component);
94static void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh);
95static void GBAProcessEvents(struct ARMCore* cpu);
96static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles);
97static void GBAHitStub(struct ARMCore* cpu, uint32_t opcode);
98static void GBAIllegal(struct ARMCore* cpu, uint32_t opcode);
99
100static void _checkOverrides(struct GBA* gba, uint32_t code);
101
102void GBACreate(struct GBA* gba) {
103 gba->d.id = GBA_COMPONENT_MAGIC;
104 gba->d.init = GBAInit;
105 gba->d.deinit = 0;
106}
107
108static void GBAInit(struct ARMCore* cpu, struct ARMComponent* component) {
109 struct GBA* gba = (struct GBA*) component;
110 gba->cpu = cpu;
111 gba->debugger = 0;
112 gba->savefile = 0;
113
114 GBAInterruptHandlerInit(&cpu->irqh);
115 GBAMemoryInit(gba);
116
117 gba->video.p = gba;
118 GBAVideoInit(&gba->video);
119
120 gba->audio.p = gba;
121 GBAAudioInit(&gba->audio);
122
123 GBAIOInit(gba);
124
125 gba->sio.p = gba;
126 GBASIOInit(&gba->sio);
127
128 gba->timersEnabled = 0;
129 memset(gba->timers, 0, sizeof(gba->timers));
130
131 gba->springIRQ = 0;
132 gba->keySource = 0;
133 gba->rotationSource = 0;
134 gba->rumble = 0;
135
136 gba->logLevel = GBA_LOG_INFO | GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL;
137
138 gba->biosChecksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
139}
140
141void GBADestroy(struct GBA* gba) {
142 GBAMemoryDeinit(gba);
143 GBAVideoDeinit(&gba->video);
144 GBAAudioDeinit(&gba->audio);
145}
146
147void GBAInterruptHandlerInit(struct ARMInterruptHandler* irqh) {
148 irqh->reset = GBAReset;
149 irqh->processEvents = GBAProcessEvents;
150 irqh->swi16 = GBASwi16;
151 irqh->swi32 = GBASwi32;
152 irqh->hitIllegal = GBAIllegal;
153 irqh->readCPSR = GBATestIRQ;
154 irqh->hitStub = GBAHitStub;
155}
156
157void GBAReset(struct ARMCore* cpu) {
158 ARMSetPrivilegeMode(cpu, MODE_IRQ);
159 cpu->gprs[ARM_SP] = SP_BASE_IRQ;
160 ARMSetPrivilegeMode(cpu, MODE_SUPERVISOR);
161 cpu->gprs[ARM_SP] = SP_BASE_SUPERVISOR;
162 ARMSetPrivilegeMode(cpu, MODE_SYSTEM);
163 cpu->gprs[ARM_SP] = SP_BASE_SYSTEM;
164}
165
166static void GBAProcessEvents(struct ARMCore* cpu) {
167 do {
168 struct GBA* gba = (struct GBA*) cpu->master;
169 int32_t cycles = cpu->cycles;
170 int32_t nextEvent = INT_MAX;
171 int32_t testEvent;
172
173 if (gba->springIRQ) {
174 ARMRaiseIRQ(cpu);
175 gba->springIRQ = 0;
176 }
177
178 testEvent = GBAVideoProcessEvents(&gba->video, cycles);
179 if (testEvent < nextEvent) {
180 nextEvent = testEvent;
181 }
182
183 testEvent = GBAAudioProcessEvents(&gba->audio, cycles);
184 if (testEvent < nextEvent) {
185 nextEvent = testEvent;
186 }
187
188 testEvent = GBATimersProcessEvents(gba, cycles);
189 if (testEvent < nextEvent) {
190 nextEvent = testEvent;
191 }
192
193 testEvent = GBAMemoryRunDMAs(gba, cycles);
194 if (testEvent < nextEvent) {
195 nextEvent = testEvent;
196 }
197
198 testEvent = GBASIOProcessEvents(&gba->sio, cycles);
199 if (testEvent < nextEvent) {
200 nextEvent = testEvent;
201 }
202
203 cpu->cycles -= cycles;
204 cpu->nextEvent = nextEvent;
205
206 if (cpu->halted) {
207 cpu->cycles = cpu->nextEvent;
208 }
209 } while (cpu->cycles >= cpu->nextEvent);
210}
211
212static int32_t GBATimersProcessEvents(struct GBA* gba, int32_t cycles) {
213 int32_t nextEvent = INT_MAX;
214 if (gba->timersEnabled) {
215 struct GBATimer* timer;
216 struct GBATimer* nextTimer;
217
218 timer = &gba->timers[0];
219 if (timer->enable) {
220 timer->nextEvent -= cycles;
221 timer->lastEvent -= cycles;
222 if (timer->nextEvent <= 0) {
223 timer->lastEvent = timer->nextEvent;
224 timer->nextEvent += timer->overflowInterval;
225 gba->memory.io[REG_TM0CNT_LO >> 1] = timer->reload;
226 timer->oldReload = timer->reload;
227
228 if (timer->doIrq) {
229 GBARaiseIRQ(gba, IRQ_TIMER0);
230 }
231
232 if (gba->audio.enable) {
233 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 0) {
234 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
235 }
236
237 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 0) {
238 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
239 }
240 }
241
242 nextTimer = &gba->timers[1];
243 if (nextTimer->countUp) {
244 ++gba->memory.io[REG_TM1CNT_LO >> 1];
245 if (!gba->memory.io[REG_TM1CNT_LO >> 1]) {
246 nextTimer->nextEvent = 0;
247 }
248 }
249 }
250 nextEvent = timer->nextEvent;
251 }
252
253 timer = &gba->timers[1];
254 if (timer->enable) {
255 timer->nextEvent -= cycles;
256 timer->lastEvent -= cycles;
257 if (timer->nextEvent <= 0) {
258 timer->lastEvent = timer->nextEvent;
259 timer->nextEvent += timer->overflowInterval;
260 gba->memory.io[REG_TM1CNT_LO >> 1] = timer->reload;
261 timer->oldReload = timer->reload;
262
263 if (timer->doIrq) {
264 GBARaiseIRQ(gba, IRQ_TIMER1);
265 }
266
267 if (gba->audio.enable) {
268 if ((gba->audio.chALeft || gba->audio.chARight) && gba->audio.chATimer == 1) {
269 GBAAudioSampleFIFO(&gba->audio, 0, timer->lastEvent);
270 }
271
272 if ((gba->audio.chBLeft || gba->audio.chBRight) && gba->audio.chBTimer == 1) {
273 GBAAudioSampleFIFO(&gba->audio, 1, timer->lastEvent);
274 }
275 }
276
277 if (timer->countUp) {
278 timer->nextEvent = INT_MAX;
279 }
280
281 nextTimer = &gba->timers[2];
282 if (nextTimer->countUp) {
283 ++gba->memory.io[REG_TM2CNT_LO >> 1];
284 if (!gba->memory.io[REG_TM2CNT_LO >> 1]) {
285 nextTimer->nextEvent = 0;
286 }
287 }
288 }
289 if (timer->nextEvent < nextEvent) {
290 nextEvent = timer->nextEvent;
291 }
292 }
293
294 timer = &gba->timers[2];
295 if (timer->enable) {
296 timer->nextEvent -= cycles;
297 timer->lastEvent -= cycles;
298 nextEvent = timer->nextEvent;
299 if (timer->nextEvent <= 0) {
300 timer->lastEvent = timer->nextEvent;
301 timer->nextEvent += timer->overflowInterval;
302 gba->memory.io[REG_TM2CNT_LO >> 1] = timer->reload;
303 timer->oldReload = timer->reload;
304
305 if (timer->doIrq) {
306 GBARaiseIRQ(gba, IRQ_TIMER2);
307 }
308
309 if (timer->countUp) {
310 timer->nextEvent = INT_MAX;
311 }
312
313 nextTimer = &gba->timers[3];
314 if (nextTimer->countUp) {
315 ++gba->memory.io[REG_TM3CNT_LO >> 1];
316 if (!gba->memory.io[REG_TM3CNT_LO >> 1]) {
317 nextTimer->nextEvent = 0;
318 }
319 }
320 }
321 if (timer->nextEvent < nextEvent) {
322 nextEvent = timer->nextEvent;
323 }
324 }
325
326 timer = &gba->timers[3];
327 if (timer->enable) {
328 timer->nextEvent -= cycles;
329 timer->lastEvent -= cycles;
330 nextEvent = timer->nextEvent;
331 if (timer->nextEvent <= 0) {
332 timer->lastEvent = timer->nextEvent;
333 timer->nextEvent += timer->overflowInterval;
334 gba->memory.io[REG_TM3CNT_LO >> 1] = timer->reload;
335 timer->oldReload = timer->reload;
336
337 if (timer->doIrq) {
338 GBARaiseIRQ(gba, IRQ_TIMER3);
339 }
340
341 if (timer->countUp) {
342 timer->nextEvent = INT_MAX;
343 }
344 }
345 if (timer->nextEvent < nextEvent) {
346 nextEvent = timer->nextEvent;
347 }
348 }
349 }
350 return nextEvent;
351}
352
353void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger) {
354 gba->debugger = debugger;
355}
356
357void GBADetachDebugger(struct GBA* gba) {
358 gba->debugger = 0;
359}
360
361void GBALoadROM(struct GBA* gba, int fd, const char* fname) {
362 struct stat info;
363 gba->memory.rom = fileMemoryMap(fd, SIZE_CART0, MEMORY_READ);
364 gba->activeFile = fname;
365 fstat(fd, &info);
366 gba->memory.romSize = info.st_size;
367 if (gba->savefile) {
368 GBASavedataInit(&gba->memory.savedata, gba->savefile);
369 }
370 GBAGPIOInit(&gba->memory.gpio, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
371 _checkOverrides(gba, ((struct GBACartridge*) gba->memory.rom)->id);
372 // TODO: error check
373}
374
375void GBALoadBIOS(struct GBA* gba, int fd) {
376 gba->memory.bios = fileMemoryMap(fd, SIZE_BIOS, MEMORY_READ);
377 gba->memory.fullBios = 1;
378 uint32_t checksum = GBAChecksum(gba->memory.bios, SIZE_BIOS);
379 GBALog(gba, GBA_LOG_DEBUG, "BIOS Checksum: 0x%X", checksum);
380 if (checksum == GBA_BIOS_CHECKSUM) {
381 GBALog(gba, GBA_LOG_INFO, "Official GBA BIOS detected");
382 } else if (checksum == GBA_DS_BIOS_CHECKSUM) {
383 GBALog(gba, GBA_LOG_INFO, "Official GBA (DS) BIOS detected");
384 } else {
385 GBALog(gba, GBA_LOG_WARN, "BIOS checksum incorrect");
386 }
387 gba->biosChecksum = checksum;
388 if ((gba->cpu->gprs[ARM_PC] >> BASE_OFFSET) == BASE_BIOS) {
389 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
390 }
391 // TODO: error check
392}
393
394void GBATimerUpdateRegister(struct GBA* gba, int timer) {
395 struct GBATimer* currentTimer = &gba->timers[timer];
396 if (currentTimer->enable && !currentTimer->countUp) {
397 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> currentTimer->prescaleBits);
398 }
399}
400
401void GBATimerWriteTMCNT_LO(struct GBA* gba, int timer, uint16_t reload) {
402 gba->timers[timer].reload = reload;
403}
404
405void GBATimerWriteTMCNT_HI(struct GBA* gba, int timer, uint16_t control) {
406 struct GBATimer* currentTimer = &gba->timers[timer];
407 GBATimerUpdateRegister(gba, timer);
408
409 int oldPrescale = currentTimer->prescaleBits;
410 switch (control & 0x0003) {
411 case 0x0000:
412 currentTimer->prescaleBits = 0;
413 break;
414 case 0x0001:
415 currentTimer->prescaleBits = 6;
416 break;
417 case 0x0002:
418 currentTimer->prescaleBits = 8;
419 break;
420 case 0x0003:
421 currentTimer->prescaleBits = 10;
422 break;
423 }
424 currentTimer->countUp = !!(control & 0x0004);
425 currentTimer->doIrq = !!(control & 0x0040);
426 currentTimer->overflowInterval = (0x10000 - currentTimer->reload) << currentTimer->prescaleBits;
427 int wasEnabled = currentTimer->enable;
428 currentTimer->enable = !!(control & 0x0080);
429 if (!wasEnabled && currentTimer->enable) {
430 if (!currentTimer->countUp) {
431 currentTimer->nextEvent = gba->cpu->cycles + currentTimer->overflowInterval;
432 } else {
433 currentTimer->nextEvent = INT_MAX;
434 }
435 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->reload;
436 currentTimer->oldReload = currentTimer->reload;
437 gba->timersEnabled |= 1 << timer;
438 } else if (wasEnabled && !currentTimer->enable) {
439 if (!currentTimer->countUp) {
440 gba->memory.io[(REG_TM0CNT_LO + (timer << 2)) >> 1] = currentTimer->oldReload + ((gba->cpu->cycles - currentTimer->lastEvent) >> oldPrescale);
441 }
442 gba->timersEnabled &= ~(1 << timer);
443 } else if (currentTimer->prescaleBits != oldPrescale && !currentTimer->countUp) {
444 // FIXME: this might be before present
445 currentTimer->nextEvent = currentTimer->lastEvent + currentTimer->overflowInterval;
446 }
447
448 if (currentTimer->nextEvent < gba->cpu->nextEvent) {
449 gba->cpu->nextEvent = currentTimer->nextEvent;
450 }
451};
452
453void GBAWriteIE(struct GBA* gba, uint16_t value) {
454 if (value & (1 << IRQ_KEYPAD)) {
455 GBALog(gba, GBA_LOG_STUB, "Keypad interrupts not implemented");
456 }
457
458 if (value & (1 << IRQ_GAMEPAK)) {
459 GBALog(gba, GBA_LOG_STUB, "Gamepak interrupts not implemented");
460 }
461
462 if (gba->memory.io[REG_IME >> 1] && value & gba->memory.io[REG_IF >> 1]) {
463 ARMRaiseIRQ(gba->cpu);
464 }
465}
466
467void GBAWriteIME(struct GBA* gba, uint16_t value) {
468 if (value && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
469 ARMRaiseIRQ(gba->cpu);
470 }
471}
472
473void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
474 gba->memory.io[REG_IF >> 1] |= 1 << irq;
475 gba->cpu->halted = 0;
476
477 if (gba->memory.io[REG_IME >> 1] && (gba->memory.io[REG_IE >> 1] & 1 << irq)) {
478 ARMRaiseIRQ(gba->cpu);
479 }
480}
481
482void GBATestIRQ(struct ARMCore* cpu) {
483 struct GBA* gba = (struct GBA*) cpu->master;
484 if (gba->memory.io[REG_IME >> 1] && gba->memory.io[REG_IE >> 1] & gba->memory.io[REG_IF >> 1]) {
485 gba->springIRQ = 1;
486 gba->cpu->nextEvent = 0;
487 }
488}
489
490void GBAHalt(struct GBA* gba) {
491 gba->cpu->nextEvent = 0;
492 gba->cpu->halted = 1;
493}
494
495static void _GBAVLog(struct GBA* gba, enum GBALogLevel level, const char* format, va_list args) {
496 if (!gba) {
497 struct GBAThread* threadContext = GBAThreadGetContext();
498 if (threadContext) {
499 gba = threadContext->gba;
500 }
501 }
502
503 if (gba && gba->logHandler) {
504 gba->logHandler(gba, level, format, args);
505 return;
506 }
507
508 if (gba && !(level & gba->logLevel) && level != GBA_LOG_FATAL) {
509 return;
510 }
511
512 vprintf(format, args);
513 printf("\n");
514
515 if (level == GBA_LOG_FATAL) {
516 abort();
517 }
518}
519
520void GBALog(struct GBA* gba, enum GBALogLevel level, const char* format, ...) {
521 va_list args;
522 va_start(args, format);
523 _GBAVLog(gba, level, format, args);
524 va_end(args);
525}
526
527void GBADebuggerLogShim(struct ARMDebugger* debugger, enum DebuggerLogLevel level, const char* format, ...) {
528 struct GBA* gba = 0;
529 if (debugger->cpu) {
530 gba = (struct GBA*) debugger->cpu->master;
531 }
532
533 enum GBALogLevel gbaLevel;
534 switch (level) {
535 case DEBUGGER_LOG_DEBUG:
536 gbaLevel = GBA_LOG_DEBUG;
537 break;
538 case DEBUGGER_LOG_INFO:
539 gbaLevel = GBA_LOG_INFO;
540 break;
541 case DEBUGGER_LOG_WARN:
542 gbaLevel = GBA_LOG_WARN;
543 break;
544 case DEBUGGER_LOG_ERROR:
545 gbaLevel = GBA_LOG_ERROR;
546 break;
547 }
548 va_list args;
549 va_start(args, format);
550 _GBAVLog(gba, gbaLevel, format, args);
551 va_end(args);
552}
553
554
555void GBAHitStub(struct ARMCore* cpu, uint32_t opcode) {
556 struct GBA* gba = (struct GBA*) cpu;
557 enum GBALogLevel level = GBA_LOG_FATAL;
558 if (gba->debugger) {
559 level = GBA_LOG_STUB;
560 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
561 }
562 GBALog(gba, level, "Stub opcode: %08x", opcode);
563}
564
565void GBAIllegal(struct ARMCore* cpu, uint32_t opcode) {
566 struct GBA* gba = (struct GBA*) cpu->master;
567 GBALog(gba, GBA_LOG_WARN, "Illegal opcode: %08x", opcode);
568 if (gba->debugger) {
569 ARMDebuggerEnter(gba->debugger, DEBUGGER_ENTER_ILLEGAL_OP);
570 }
571}
572
573void _checkOverrides(struct GBA* gba, uint32_t id) {
574 int i;
575 for (i = 0; _overrides[i].id[0]; ++i) {
576 const uint32_t* overrideId = (const uint32_t*) _overrides[i].id;
577 if (*overrideId == id) {
578 switch (_overrides[i].type) {
579 case SAVEDATA_FLASH512:
580 case SAVEDATA_FLASH1M:
581 gba->memory.savedata.type = _overrides[i].type;
582 GBASavedataInitFlash(&gba->memory.savedata);
583 break;
584 case SAVEDATA_EEPROM:
585 GBASavedataInitEEPROM(&gba->memory.savedata);
586 break;
587 case SAVEDATA_SRAM:
588 GBASavedataInitSRAM(&gba->memory.savedata);
589 break;
590 case SAVEDATA_NONE:
591 break;
592 }
593
594 if (_overrides[i].gpio & GPIO_RTC) {
595 GBAGPIOInitRTC(&gba->memory.gpio);
596 }
597
598 if (_overrides[i].gpio & GPIO_GYRO) {
599 GBAGPIOInitGyro(&gba->memory.gpio);
600 }
601
602 if (_overrides[i].gpio & GPIO_RUMBLE) {
603 GBAGPIOInitRumble(&gba->memory.gpio);
604 }
605 return;
606 }
607 }
608}