1 | //============================================================================ |
2 | // |
3 | // SSSS tt lll lll |
4 | // SS SS tt ll ll |
5 | // SS tttttt eeee ll ll aaaa |
6 | // SSSS tt ee ee ll ll aa |
7 | // SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator" |
8 | // SS SS tt ee ll ll aa aa |
9 | // SSSS ttt eeeee llll llll aaaaa |
10 | // |
11 | // Copyright (c) 1995-2019 by Bradford W. Mott, Stephen Anthony |
12 | // and the Stella Team |
13 | // |
14 | // See the file "License.txt" for information on usage and redistribution of |
15 | // this file, and for a DISCLAIMER OF ALL WARRANTIES. |
16 | //============================================================================ |
17 | |
18 | #include <cstring> |
19 | |
20 | #ifdef DEBUGGER_SUPPORT |
21 | #include "Debugger.hxx" |
22 | #include "CartCDFWidget.hxx" |
23 | #include "CartCDFInfoWidget.hxx" |
24 | #endif |
25 | |
26 | #include "System.hxx" |
27 | #include "Thumbulator.hxx" |
28 | #include "CartCDF.hxx" |
29 | #include "TIA.hxx" |
30 | #include "exception/FatalEmulationError.hxx" |
31 | |
32 | #define DSRAM 0x0800 |
33 | |
34 | #define COMMSTREAM 0x20 |
35 | #define JUMPSTREAM_BASE 0x21 |
36 | |
37 | #define FAST_FETCH_ON ((myMode & 0x0F) == 0) |
38 | #define DIGITAL_AUDIO_ON ((myMode & 0xF0) == 0) |
39 | |
40 | namespace { |
41 | Thumbulator::ConfigureFor thumulatorConfiguration(CartridgeCDF::CDFSubtype subtype) |
42 | { |
43 | switch (subtype) { |
44 | case CartridgeCDF::CDFSubtype::CDF0: |
45 | return Thumbulator::ConfigureFor::CDF; |
46 | |
47 | case CartridgeCDF::CDFSubtype::CDF1: |
48 | return Thumbulator::ConfigureFor::CDF1; |
49 | |
50 | case CartridgeCDF::CDFSubtype::CDFJ: |
51 | return Thumbulator::ConfigureFor::CDFJ; |
52 | |
53 | default: |
54 | throw runtime_error("unreachable" ); |
55 | } |
56 | } |
57 | } |
58 | |
59 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
60 | CartridgeCDF::CartridgeCDF(const ByteBuffer& image, size_t size, |
61 | const string& md5, const Settings& settings) |
62 | : Cartridge(settings, md5), |
63 | myAudioCycles(0), |
64 | myARMCycles(0), |
65 | myFractionalClocks(0.0) |
66 | { |
67 | // Copy the ROM image into my buffer |
68 | std::copy_n(image.get(), std::min(myImage.size(), size), myImage.begin()); |
69 | |
70 | // even though the ROM is 32K, only 28K is accessible to the 6507 |
71 | createCodeAccessBase(28_KB); |
72 | |
73 | // Pointer to the program ROM (28K @ 0 byte offset) |
74 | // which starts after the 2K CDF Driver and 2K C Code |
75 | myProgramImage = myImage.data() + 4_KB; |
76 | |
77 | // Pointer to CDF driver in RAM |
78 | myBusDriverImage = myCDFRAM.data(); |
79 | |
80 | // Pointer to the display RAM |
81 | myDisplayImage = myCDFRAM.data() + DSRAM; |
82 | |
83 | setupVersion(); |
84 | |
85 | // Create Thumbulator ARM emulator |
86 | bool devSettings = settings.getBool("dev.settings" ); |
87 | myThumbEmulator = make_unique<Thumbulator>( |
88 | reinterpret_cast<uInt16*>(myImage.data()), |
89 | reinterpret_cast<uInt16*>(myCDFRAM.data()), |
90 | static_cast<uInt32>(myImage.size()), |
91 | devSettings ? settings.getBool("dev.thumb.trapfatal" ) : false, thumulatorConfiguration(myCDFSubtype), this); |
92 | |
93 | setInitialState(); |
94 | } |
95 | |
96 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
97 | void CartridgeCDF::reset() |
98 | { |
99 | initializeRAM(myCDFRAM.data()+2_KB, myCDFRAM.size()-2_KB); |
100 | |
101 | // CDF always starts in bank 6 |
102 | initializeStartBank(6); |
103 | |
104 | myAudioCycles = myARMCycles = 0; |
105 | myFractionalClocks = 0.0; |
106 | |
107 | setInitialState(); |
108 | |
109 | // Upon reset we switch to the startup bank |
110 | bank(startBank()); |
111 | } |
112 | |
113 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
114 | void CartridgeCDF::setInitialState() |
115 | { |
116 | // Copy initial CDF driver to Harmony RAM |
117 | std::copy_n(myImage.begin(), 2_KB, myBusDriverImage); |
118 | |
119 | myMusicWaveformSize.fill(27); |
120 | |
121 | // Assuming mode starts out with Fast Fetch off and 3-Voice music, |
122 | // need to confirm with Chris |
123 | myMode = 0xFF; |
124 | |
125 | myBankOffset = myLDAimmediateOperandAddress = myJMPoperandAddress = 0; |
126 | myFastJumpActive = 0; |
127 | } |
128 | |
129 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
130 | void CartridgeCDF::consoleChanged(ConsoleTiming timing) |
131 | { |
132 | myThumbEmulator->setConsoleTiming(timing); |
133 | } |
134 | |
135 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
136 | void CartridgeCDF::install(System& system) |
137 | { |
138 | mySystem = &system; |
139 | |
140 | // Map all of the accesses to call peek and poke |
141 | System::PageAccess access(this, System::PageAccessType::READ); |
142 | for(uInt16 addr = 0x1000; addr < 0x1040; addr += System::PAGE_SIZE) |
143 | mySystem->setPageAccess(addr, access); |
144 | |
145 | // Install pages for the startup bank |
146 | bank(startBank()); |
147 | } |
148 | |
149 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
150 | inline void CartridgeCDF::updateMusicModeDataFetchers() |
151 | { |
152 | // Calculate the number of cycles since the last update |
153 | uInt32 cycles = uInt32(mySystem->cycles() - myAudioCycles); |
154 | myAudioCycles = mySystem->cycles(); |
155 | |
156 | // Calculate the number of CDF OSC clocks since the last update |
157 | double clocks = ((20000.0 * cycles) / 1193191.66666667) + myFractionalClocks; |
158 | uInt32 wholeClocks = uInt32(clocks); |
159 | myFractionalClocks = clocks - double(wholeClocks); |
160 | |
161 | // Let's update counters and flags of the music mode data fetchers |
162 | if(wholeClocks > 0) |
163 | for(int x = 0; x <= 2; ++x) |
164 | myMusicCounters[x] += myMusicFrequencies[x] * wholeClocks; |
165 | } |
166 | |
167 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
168 | inline void CartridgeCDF::callFunction(uInt8 value) |
169 | { |
170 | switch (value) |
171 | { |
172 | // Call user written ARM code (will most likely be C compiled for ARM) |
173 | case 254: // call with IRQ driven audio, no special handling needed at this |
174 | // time for Stella as ARM code "runs in zero 6507 cycles". |
175 | case 255: // call without IRQ driven audio |
176 | try { |
177 | Int32 cycles = Int32(mySystem->cycles() - myARMCycles); |
178 | myARMCycles = mySystem->cycles(); |
179 | |
180 | myThumbEmulator->run(cycles); |
181 | } |
182 | catch(const runtime_error& e) { |
183 | if(!mySystem->autodetectMode()) |
184 | { |
185 | FatalEmulationError::raise(e.what()); |
186 | } |
187 | } |
188 | break; |
189 | } |
190 | } |
191 | |
192 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
193 | uInt8 CartridgeCDF::peek(uInt16 address) |
194 | { |
195 | address &= 0x0FFF; |
196 | |
197 | uInt8 peekvalue = myProgramImage[myBankOffset + address]; |
198 | |
199 | // In debugger/bank-locked mode, we ignore all hotspots and in general |
200 | // anything that can change the internal state of the cart |
201 | if(bankLocked()) |
202 | return peekvalue; |
203 | |
204 | // implement JMP FASTJMP which fetches the destination address from stream 33 |
205 | if (myFastJumpActive |
206 | && myJMPoperandAddress == address) |
207 | { |
208 | uInt32 pointer; |
209 | uInt8 value; |
210 | |
211 | --myFastJumpActive; |
212 | ++myJMPoperandAddress; |
213 | |
214 | pointer = getDatastreamPointer(myFastJumpStream); |
215 | value = myDisplayImage[ pointer >> 20 ]; |
216 | pointer += 0x100000; // always increment by 1 |
217 | setDatastreamPointer(myFastJumpStream, pointer); |
218 | |
219 | return value; |
220 | } |
221 | |
222 | // test for JMP FASTJUMP where FASTJUMP = $0000 |
223 | if (FAST_FETCH_ON |
224 | && peekvalue == 0x4C |
225 | && (myProgramImage[myBankOffset + address+1] & myFastjumpStreamIndexMask) == 0 |
226 | && myProgramImage[myBankOffset + address+2] == 0) |
227 | { |
228 | myFastJumpActive = 2; // return next two peeks from datastream 31 |
229 | myJMPoperandAddress = address + 1; |
230 | myFastJumpStream = myProgramImage[myBankOffset + address+1] + JUMPSTREAM_BASE; |
231 | return peekvalue; |
232 | } |
233 | |
234 | myJMPoperandAddress = 0; |
235 | |
236 | // Do a FAST FETCH LDA# if: |
237 | // 1) in Fast Fetch mode |
238 | // 2) peeking the operand of an LDA # instruction |
239 | // 3) peek value is 0-34 |
240 | if(FAST_FETCH_ON |
241 | && myLDAimmediateOperandAddress == address |
242 | && peekvalue <= myAmplitudeStream) |
243 | { |
244 | myLDAimmediateOperandAddress = 0; |
245 | if (peekvalue == myAmplitudeStream) |
246 | { |
247 | updateMusicModeDataFetchers(); |
248 | |
249 | if DIGITAL_AUDIO_ON |
250 | { |
251 | // retrieve packed sample (max size is 2K, or 4K of unpacked data) |
252 | uInt32 sampleaddress = getSample() + (myMusicCounters[0] >> 21); |
253 | |
254 | // get sample value from ROM or RAM |
255 | if (sampleaddress < 0x8000) |
256 | peekvalue = myImage[sampleaddress]; |
257 | else if (sampleaddress >= 0x40000000 && sampleaddress < 0x40002000) // check for RAM |
258 | peekvalue = myCDFRAM[sampleaddress - 0x40000000]; |
259 | else |
260 | peekvalue = 0; |
261 | |
262 | // make sure current volume value is in the lower nybble |
263 | if ((myMusicCounters[0] & (1<<20)) == 0) |
264 | peekvalue >>= 4; |
265 | peekvalue &= 0x0f; |
266 | } |
267 | else |
268 | { |
269 | peekvalue = myDisplayImage[getWaveform(0) + (myMusicCounters[0] >> myMusicWaveformSize[0])] |
270 | + myDisplayImage[getWaveform(1) + (myMusicCounters[1] >> myMusicWaveformSize[1])] |
271 | + myDisplayImage[getWaveform(2) + (myMusicCounters[2] >> myMusicWaveformSize[2])]; |
272 | } |
273 | return peekvalue; |
274 | } |
275 | else |
276 | { |
277 | return readFromDatastream(peekvalue); |
278 | } |
279 | } |
280 | myLDAimmediateOperandAddress = 0; |
281 | |
282 | // Switch banks if necessary |
283 | switch(address) |
284 | { |
285 | case 0xFF5: |
286 | // Set the current bank to the first 4k bank |
287 | bank(0); |
288 | break; |
289 | |
290 | case 0x0FF6: |
291 | // Set the current bank to the second 4k bank |
292 | bank(1); |
293 | break; |
294 | |
295 | case 0x0FF7: |
296 | // Set the current bank to the third 4k bank |
297 | bank(2); |
298 | break; |
299 | |
300 | case 0x0FF8: |
301 | // Set the current bank to the fourth 4k bank |
302 | bank(3); |
303 | break; |
304 | |
305 | case 0x0FF9: |
306 | // Set the current bank to the fifth 4k bank |
307 | bank(4); |
308 | break; |
309 | |
310 | case 0x0FFA: |
311 | // Set the current bank to the sixth 4k bank |
312 | bank(5); |
313 | break; |
314 | |
315 | case 0x0FFB: |
316 | // Set the current bank to the last 4k bank |
317 | bank(6); |
318 | break; |
319 | |
320 | default: |
321 | break; |
322 | } |
323 | |
324 | if(FAST_FETCH_ON && peekvalue == 0xA9) |
325 | myLDAimmediateOperandAddress = address + 1; |
326 | |
327 | return peekvalue; |
328 | } |
329 | |
330 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
331 | bool CartridgeCDF::poke(uInt16 address, uInt8 value) |
332 | { |
333 | uInt32 pointer; |
334 | |
335 | address &= 0x0FFF; |
336 | |
337 | switch(address) |
338 | { |
339 | case 0xFF0: // DSWRITE |
340 | pointer = getDatastreamPointer(COMMSTREAM); |
341 | myDisplayImage[ pointer >> 20 ] = value; |
342 | pointer += 0x100000; // always increment by 1 when writing |
343 | setDatastreamPointer(COMMSTREAM, pointer); |
344 | break; |
345 | |
346 | case 0xFF1: // DSPTR |
347 | pointer = getDatastreamPointer(COMMSTREAM); |
348 | pointer <<=8; |
349 | pointer &= 0xf0000000; |
350 | pointer |= (value << 20); |
351 | setDatastreamPointer(COMMSTREAM, pointer); |
352 | break; |
353 | |
354 | case 0xFF2: // SETMODE |
355 | myMode = value; |
356 | break; |
357 | |
358 | case 0xFF3: // CALLFN |
359 | callFunction(value); |
360 | break; |
361 | |
362 | case 0xFF5: |
363 | // Set the current bank to the first 4k bank |
364 | bank(0); |
365 | break; |
366 | |
367 | case 0x0FF6: |
368 | // Set the current bank to the second 4k bank |
369 | bank(1); |
370 | break; |
371 | |
372 | case 0x0FF7: |
373 | // Set the current bank to the third 4k bank |
374 | bank(2); |
375 | break; |
376 | |
377 | case 0x0FF8: |
378 | // Set the current bank to the fourth 4k bank |
379 | bank(3); |
380 | break; |
381 | |
382 | case 0x0FF9: |
383 | // Set the current bank to the fifth 4k bank |
384 | bank(4); |
385 | break; |
386 | |
387 | case 0x0FFA: |
388 | // Set the current bank to the sixth 4k bank |
389 | bank(5); |
390 | break; |
391 | |
392 | case 0x0FFB: |
393 | // Set the current bank to the last 4k bank |
394 | bank(6); |
395 | break; |
396 | |
397 | default: |
398 | break; |
399 | } |
400 | |
401 | return false; |
402 | } |
403 | |
404 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
405 | bool CartridgeCDF::bank(uInt16 bank) |
406 | { |
407 | if(bankLocked()) return false; |
408 | |
409 | // Remember what bank we're in |
410 | myBankOffset = bank << 12; |
411 | |
412 | // Setup the page access methods for the current bank |
413 | System::PageAccess access(this, System::PageAccessType::READ); |
414 | |
415 | // Map Program ROM image into the system |
416 | for(uInt16 addr = 0x1040; addr < 0x2000; addr += System::PAGE_SIZE) |
417 | { |
418 | access.codeAccessBase = &myCodeAccessBase[myBankOffset + (addr & 0x0FFF)]; |
419 | mySystem->setPageAccess(addr, access); |
420 | } |
421 | return myBankChanged = true; |
422 | } |
423 | |
424 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
425 | uInt16 CartridgeCDF::getBank(uInt16) const |
426 | { |
427 | return myBankOffset >> 12; |
428 | } |
429 | |
430 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
431 | uInt16 CartridgeCDF::bankCount() const |
432 | { |
433 | return 7; |
434 | } |
435 | |
436 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
437 | bool CartridgeCDF::patch(uInt16 address, uInt8 value) |
438 | { |
439 | address &= 0x0FFF; |
440 | |
441 | // For now, we ignore attempts to patch the CDF address space |
442 | if(address >= 0x0040) |
443 | { |
444 | myProgramImage[myBankOffset + (address & 0x0FFF)] = value; |
445 | return myBankChanged = true; |
446 | } |
447 | else |
448 | return false; |
449 | } |
450 | |
451 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
452 | const uInt8* CartridgeCDF::getImage(size_t& size) const |
453 | { |
454 | size = myImage.size(); |
455 | return myImage.data(); |
456 | } |
457 | |
458 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
459 | uInt32 CartridgeCDF::thumbCallback(uInt8 function, uInt32 value1, uInt32 value2) |
460 | { |
461 | switch (function) |
462 | { |
463 | case 0: |
464 | // _SetNote - set the note/frequency |
465 | myMusicFrequencies[value1] = value2; |
466 | break; |
467 | |
468 | // _ResetWave - reset counter, |
469 | // used to make sure digital samples start from the beginning |
470 | case 1: |
471 | myMusicCounters[value1] = 0; |
472 | break; |
473 | |
474 | // _GetWavePtr - return the counter |
475 | case 2: |
476 | return myMusicCounters[value1]; |
477 | |
478 | // _SetWaveSize - set size of waveform buffer |
479 | case 3: |
480 | myMusicWaveformSize[value1] = value2; |
481 | break; |
482 | } |
483 | |
484 | return 0; |
485 | } |
486 | |
487 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
488 | bool CartridgeCDF::save(Serializer& out) const |
489 | { |
490 | try |
491 | { |
492 | // Indicates which bank is currently active |
493 | out.putShort(myBankOffset); |
494 | |
495 | // Indicates current mode |
496 | out.putByte(myMode); |
497 | |
498 | // State of FastJump |
499 | out.putByte(myFastJumpActive); |
500 | |
501 | // operand addresses |
502 | out.putShort(myLDAimmediateOperandAddress); |
503 | out.putShort(myJMPoperandAddress); |
504 | |
505 | // Harmony RAM |
506 | out.putByteArray(myCDFRAM.data(), myCDFRAM.size()); |
507 | |
508 | // Audio info |
509 | out.putIntArray(myMusicCounters.data(), myMusicCounters.size()); |
510 | out.putIntArray(myMusicFrequencies.data(), myMusicFrequencies.size()); |
511 | out.putByteArray(myMusicWaveformSize.data(), myMusicWaveformSize.size()); |
512 | |
513 | // Save cycles and clocks |
514 | out.putLong(myAudioCycles); |
515 | out.putDouble(myFractionalClocks); |
516 | out.putLong(myARMCycles); |
517 | } |
518 | catch(...) |
519 | { |
520 | cerr << "ERROR: CartridgeCDF::save" << endl; |
521 | return false; |
522 | } |
523 | |
524 | return true; |
525 | } |
526 | |
527 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
528 | bool CartridgeCDF::load(Serializer& in) |
529 | { |
530 | try |
531 | { |
532 | // Indicates which bank is currently active |
533 | myBankOffset = in.getShort(); |
534 | |
535 | // Indicates current mode |
536 | myMode = in.getByte(); |
537 | |
538 | // State of FastJump |
539 | myFastJumpActive = in.getByte(); |
540 | |
541 | // Address of LDA # operand |
542 | myLDAimmediateOperandAddress = in.getShort(); |
543 | myJMPoperandAddress = in.getShort(); |
544 | |
545 | // Harmony RAM |
546 | in.getByteArray(myCDFRAM.data(), myCDFRAM.size()); |
547 | |
548 | // Audio info |
549 | in.getIntArray(myMusicCounters.data(), myMusicCounters.size()); |
550 | in.getIntArray(myMusicFrequencies.data(), myMusicFrequencies.size()); |
551 | in.getByteArray(myMusicWaveformSize.data(), myMusicWaveformSize.size()); |
552 | |
553 | // Get cycles and clocks |
554 | myAudioCycles = in.getLong(); |
555 | myFractionalClocks = in.getDouble(); |
556 | myARMCycles = in.getLong(); |
557 | } |
558 | catch(...) |
559 | { |
560 | cerr << "ERROR: CartridgeCDF::load" << endl; |
561 | return false; |
562 | } |
563 | |
564 | // Now, go to the current bank |
565 | bank(myBankOffset >> 12); |
566 | |
567 | return true; |
568 | } |
569 | |
570 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
571 | uInt32 CartridgeCDF::getDatastreamPointer(uInt8 index) const |
572 | { |
573 | uInt16 address = myDatastreamBase + index * 4; |
574 | |
575 | return myCDFRAM[address + 0] + // low byte |
576 | (myCDFRAM[address + 1] << 8) + |
577 | (myCDFRAM[address + 2] << 16) + |
578 | (myCDFRAM[address + 3] << 24) ; // high byte |
579 | } |
580 | |
581 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
582 | void CartridgeCDF::setDatastreamPointer(uInt8 index, uInt32 value) |
583 | { |
584 | uInt16 address = myDatastreamBase + index * 4; |
585 | |
586 | myCDFRAM[address + 0] = value & 0xff; // low byte |
587 | myCDFRAM[address + 1] = (value >> 8) & 0xff; |
588 | myCDFRAM[address + 2] = (value >> 16) & 0xff; |
589 | myCDFRAM[address + 3] = (value >> 24) & 0xff; // high byte |
590 | } |
591 | |
592 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
593 | uInt32 CartridgeCDF::getDatastreamIncrement(uInt8 index) const |
594 | { |
595 | uInt16 address = myDatastreamIncrementBase + index * 4; |
596 | |
597 | return myCDFRAM[address + 0] + // low byte |
598 | (myCDFRAM[address + 1] << 8) + |
599 | (myCDFRAM[address + 2] << 16) + |
600 | (myCDFRAM[address + 3] << 24) ; // high byte |
601 | } |
602 | |
603 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
604 | uInt32 CartridgeCDF::getWaveform(uInt8 index) const |
605 | { |
606 | uInt16 address = myWaveformBase + index * 4; |
607 | |
608 | uInt32 result = myCDFRAM[address + 0] + // low byte |
609 | (myCDFRAM[address + 1] << 8) + |
610 | (myCDFRAM[address + 2] << 16) + |
611 | (myCDFRAM[address + 3] << 24); // high byte |
612 | |
613 | result -= (0x40000000 + DSRAM); |
614 | |
615 | if (result >= 4096) |
616 | result &= 4095; |
617 | |
618 | return result; |
619 | } |
620 | |
621 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
622 | uInt32 CartridgeCDF::getSample() |
623 | { |
624 | uInt16 address = myWaveformBase; |
625 | |
626 | uInt32 result = myCDFRAM[address + 0] + // low byte |
627 | (myCDFRAM[address + 1] << 8) + |
628 | (myCDFRAM[address + 2] << 16) + |
629 | (myCDFRAM[address + 3] << 24); // high byte |
630 | |
631 | return result; |
632 | } |
633 | |
634 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
635 | uInt32 CartridgeCDF::getWaveformSize(uInt8 index) const |
636 | { |
637 | return myMusicWaveformSize[index]; |
638 | } |
639 | |
640 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
641 | uInt8 CartridgeCDF::readFromDatastream(uInt8 index) |
642 | { |
643 | // Pointers are stored as: |
644 | // PPPFF--- |
645 | // |
646 | // Increments are stored as |
647 | // ----IIFF |
648 | // |
649 | // P = Pointer |
650 | // I = Increment |
651 | // F = Fractional |
652 | |
653 | uInt32 pointer = getDatastreamPointer(index); |
654 | uInt16 increment = getDatastreamIncrement(index); |
655 | uInt8 value = myDisplayImage[ pointer >> 20 ]; |
656 | pointer += (increment << 12); |
657 | setDatastreamPointer(index, pointer); |
658 | return value; |
659 | } |
660 | |
661 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
662 | void CartridgeCDF::setupVersion() |
663 | { |
664 | uInt8 subversion = 0; |
665 | |
666 | for(uInt32 i = 0; i < 2048; i += 4) |
667 | { |
668 | // CDF signature occurs 3 times in a row, i+3 (+7 or +11) is version |
669 | if ( myImage[i+0] == 0x43 && myImage[i + 4] == 0x43 && myImage[i + 8] == 0x43) // C |
670 | if ( myImage[i+1] == 0x44 && myImage[i + 5] == 0x44 && myImage[i + 9] == 0x44) // D |
671 | if (myImage[i+2] == 0x46 && myImage[i + 6] == 0x46 && myImage[i +10] == 0x46) // F |
672 | { |
673 | subversion = myImage[i+3]; |
674 | break; |
675 | } |
676 | } |
677 | |
678 | switch (subversion) { |
679 | case 0x4a: |
680 | myCDFSubtype = CDFSubtype::CDFJ; |
681 | |
682 | myAmplitudeStream = 0x23; |
683 | myFastjumpStreamIndexMask = 0xfe; |
684 | myDatastreamBase = 0x0098; |
685 | myDatastreamIncrementBase = 0x0124; |
686 | myWaveformBase = 0x01b0; |
687 | |
688 | break; |
689 | |
690 | case 0: |
691 | myCDFSubtype = CDFSubtype::CDF0; |
692 | |
693 | myAmplitudeStream = 0x22; |
694 | myFastjumpStreamIndexMask = 0xff; |
695 | myDatastreamBase = 0x06e0; |
696 | myDatastreamIncrementBase = 0x0768; |
697 | myWaveformBase = 0x07f0; |
698 | |
699 | break; |
700 | |
701 | default: |
702 | myCDFSubtype = CDFSubtype::CDF1; |
703 | |
704 | myAmplitudeStream = 0x22; |
705 | myFastjumpStreamIndexMask = 0xff; |
706 | myDatastreamBase = 0x00a0; |
707 | myDatastreamIncrementBase = 0x0128; |
708 | myWaveformBase = 0x01b0; |
709 | } |
710 | } |
711 | |
712 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
713 | string CartridgeCDF::name() const |
714 | { |
715 | switch(myCDFSubtype) |
716 | { |
717 | case CDFSubtype::CDF0: |
718 | return "CartridgeCDF0" ; |
719 | case CDFSubtype::CDF1: |
720 | return "CartridgeCDF1" ; |
721 | case CDFSubtype::CDFJ: |
722 | return "CartridgeCDFJ" ; |
723 | default: |
724 | return "Cart unknown" ; |
725 | } |
726 | } |
727 | |
728 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
729 | #ifdef DEBUGGER_SUPPORT |
730 | CartDebugWidget* CartridgeCDF::debugWidget(GuiObject* boss, const GUI::Font& lfont, |
731 | const GUI::Font& nfont, int x, int y, int w, int h) |
732 | { |
733 | return new CartridgeCDFWidget(boss, lfont, nfont, x, y, w, h, *this); |
734 | } |
735 | |
736 | CartDebugWidget* CartridgeCDF::infoWidget(GuiObject* boss, const GUI::Font& lfont, |
737 | const GUI::Font& nfont, int x, int y, int w, int h) |
738 | { |
739 | return new CartridgeCDFInfoWidget(boss, lfont, nfont, x, y, w, h, *this); |
740 | } |
741 | #endif |
742 | |