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1.1 root 1: /*
2: Hatari - Crossbar.c
3:
1.1.1.5 root 4: This file is distributed under the GNU General Public License, version 2
5: or at your option any later version. Read the file gpl.txt for details.
1.1 root 6:
7: Falcon Crossbar (Matrice) emulation.
8: input device:
9: - DSP transmit (SSI)
10: - external DSP connector
11: - ADC (micro + PSG chip)
12: - DMA playback
13:
14: output device:
15: - external DSP connector
16: - DSP receive (SSI)
17: - DAC (headphone, loudspeaker and monitor sound)
18: - DMA record
19:
20: There are 3 possible clocks :
21: - internal clock 25,175 MHz (Ste compatible)
22: - internal clock 32 MHz
23: - external clock (DSP external port, up to 32 Mhz)
24:
25: Transfers between 2 devices can use handshaking or continuous mode
26:
27: Hardware I/O registers:
28: $FF8900 (byte) : Sound DMA control
29: $FF8901 (byte) : Sound DMA control
30: $FF8903 (byte) : Frame Start Hi
31: $FF8905 (byte) : Frame Start Mi
32: $FF8907 (byte) : Frame Start Lo
33: $FF8909 (byte) : Frame Count Hi
34: $FF890B (byte) : Frame Count Mi
35: $FF890D (byte) : Frame Count Lo
36: $FF890F (byte) : Frame End Hi
37: $FF8911 (byte) : Frame End Mi
38: $FF8913 (byte) : Frame End Lo
39: $FF8920 (byte) : Sound Mode Control
40: $FF8921 (byte) : Sound Mode Control
41: $FF8930 (word) : DMA Crossbar Input Select Controller
42: $FF8932 (word) : DMA Crossbar Output Select Controller
43: $FF8934 (byte) : External Sync Frequency Divider
44: $FF8935 (byte) : Internal Sync Frequency Divider
45: $FF8936 (byte) : Record Track select
46: $FF8937 (byte) : Codec Input Source
47: $FF8938 (byte) : Codec ADC Input
48: $FF8939 (byte) : Gain Settings Per Channel
1.1.1.5 root 49: $FF893A (word) : Attenuation Settings Per Channel
1.1 root 50: $FF893C (word) : Codec Status
51: $FF8940 (word) : GPIO Data Direction
52: $FF8942 (word) : GPIO Data
53:
54:
55: Crossbar schematics:
56:
57: - one receiving device can be connected to only one source device
58: - one source device can be connected to multiple receiving device
59:
60: Source devices
61: CROSSBAR
62: EXT INPUT ---O------O------O-----O
63: CHANNEL | | | |
64: | | | |
65: DSP ---O------O------O-----O
66: TRANSMIT | | | |
67: | | | |
68: Mic L -----| DMA ---O------O------O-----O
69: /---|XOR ----|\ PLAYBACK | | | |
70: PSG --| | \ | | | |
71: \---| | /-------X--------O------O------O-----O
72: Mic R -----|XOR ----|/ | | | | |
73: ADC | | DMA DSP EXT OUTPUT Receiving Devices
74: | | RECEIVE CHANNEL
75: | |
76: -----------------
77: \ + /
78: \-----------/
79: |
80: |
81: -----
82: \ / DAC
83: \ /
84: |
85: |
86: Output to:
87: - header,
88: - internal speaker,
89: - monitor speaker
90: */
91:
92: const char crossbar_fileid[] = "Hatari Crossbar.c : " __DATE__ " " __TIME__;
93:
94: #include "main.h"
95: #include "audio.h"
96: #include "configuration.h"
97: #include "cycInt.h"
98: #include "ioMem.h"
99: #include "log.h"
100: #include "memorySnapShot.h"
101: #include "mfp.h"
102: #include "sound.h"
103: #include "crossbar.h"
104: #include "microphone.h"
105: #include "stMemory.h"
106: #include "dsp.h"
107:
108:
109: #define DACBUFFER_SIZE 2048
110: #define DECIMAL_PRECISION 65536
111:
112:
113: /* Crossbar internal functions */
1.1.1.4 root 114: static int Crossbar_DetectSampleRate(Uint16 clock);
1.1 root 115: static void Crossbar_Recalculate_Clocks_Cycles(void);
116: static void Crossbar_Start_InterruptHandler_25Mhz(void);
117: static void Crossbar_Start_InterruptHandler_32Mhz(void);
118:
119: /* Dma_Play sound functions */
120: static void Crossbar_setDmaPlay_Settings(void);
121: static void Crossbar_Process_DMAPlay_Transfer(void);
122:
123: /* Dma_Record sound functions */
124: static void Crossbar_setDmaRecord_Settings(void);
125: void Crossbar_SendDataToDmaRecord(Sint16 value);
126: static void Crossbar_Process_DMARecord_HandshakeMode(void);
127:
128: /* Dsp Xmit functions */
129: static void Crossbar_SendDataToDspReceive(Uint32 value, Uint16 frame);
130: static void Crossbar_Process_DSPXmit_Transfer(void);
131:
132: /* DAC functions */
133: static void Crossbar_SendDataToDAC(Sint16 value, Uint16 sample_pos);
134:
135: /* ADC functions */
136: static void Crossbar_Process_ADCXmit_Transfer(void);
137:
138: /* external data used by the MFP */
139: Uint16 nCbar_DmaSoundControl;
140:
141: /* internal datas */
142:
143: /* dB = 20log(gain) : gain = antilog(dB/20) */
144: /* Table gain values = (int)(powf(10.0, dB/20.0)*65536.0 + 0.5) 1.5dB steps */
145:
146: /* Values for Codec's ADC volume control (* DECIMAL_PRECISION) */
147: /* PSG must be amplified by 2.66.. before mixing with crossbar */
148: /* The ADC table values are multiplied by 2'2/3 and divided */
149: /* by 4 (later multplied by 4) eg 43691 = 65536 * 2.66.. / 4.0 */
150: static const Uint16 Crossbar_ADC_volume_table[16] =
151: {
152: 3276, 3894, 4628, 5500, 6537, 7769, 9234, 10975,
153: 13043, 15502, 18424, 21897, 26025, 30931, 36761, 43691
154: };
155:
156: /* Values for Codec's DAC volume control (* DECIMAL_PRECISION) */
157: static const Uint16 Crossbar_DAC_volume_table[16] =
158: {
159: 65535, 55142, 46396, 39037, 32846, 27636, 23253, 19565,
160: 16462, 13851, 11654, 9806, 8250, 6942, 5841, 4915
161: };
162:
1.1.1.4 root 163: static const int Ste_SampleRates[4] =
1.1 root 164: {
1.1.1.4 root 165: 6258,
166: 12517,
167: 25033,
168: 50066
1.1 root 169: };
170:
1.1.1.4 root 171: static const int Falcon_SampleRates_25Mhz[15] =
1.1 root 172: {
1.1.1.4 root 173: 49170,
174: 32780,
175: 24585,
176: 19668,
177: 16390,
178: 14049,
179: 12292,
180: 10927,
181: 9834,
182: 8940,
183: 8195,
184: 7565,
185: 7024,
186: 6556,
187: 6146
1.1 root 188: };
189:
1.1.1.4 root 190: static const int Falcon_SampleRates_32Mhz[15] =
1.1 root 191: {
1.1.1.4 root 192: 62500,
193: 41666,
194: 31250,
195: 25000,
196: 20833,
197: 17857,
198: 15624,
199: 13889,
200: 12500,
201: 11363,
202: 10416,
203: 9615,
204: 8928,
205: 8333,
206: 7812
1.1 root 207: };
208:
209: struct dma_s {
210: Uint32 frameStartAddr; /* Sound frame start */
211: Uint32 frameEndAddr; /* Sound frame end */
212: Uint32 frameCounter; /* Counter in current sound frame */
213: Uint32 frameLen; /* Length of the frame */
214: Uint32 isRunning; /* Is Playing / Recording ? */
215: Uint32 loopMode; /* Loop mode enabled ? */
216: Uint32 currentFrame; /* Current Frame Played / Recorded (in stereo, 2 frames = 1 track) */
217: Uint32 timerA_int; /* Timer A interrupt at end of Play / Record ? */
218: Uint32 mfp15_int; /* MFP-15 interrupt at end of Play / Record ? */
219: Uint32 isConnectedToCodec;
220: Uint32 isConnectedToDsp;
221: Uint32 isConnectedToDspInHandShakeMode;
222: Uint32 isConnectedToDma;
223: Uint32 handshakeMode_Frame; /* state of the frame in handshake mode */
224: };
225:
226: struct crossbar_s {
227: Uint32 dmaSelected; /* 1 = DMA Record; 0 = DMA Play */
228: Uint32 playTracks; /* number of tracks played */
229: Uint32 recordTracks; /* number of tracks recorded */
230: Uint16 track_monitored; /* track monitored by the DAC */
231: Uint32 is16Bits; /* 0 = 8 bits; 1 = 16 bits */
232: Uint32 isStereo; /* 0 = mono; 1 = stereo */
233: Uint32 steFreq; /* from 0 (6258 Hz) to 3 (50066 Hz) */
234: Uint32 isInSteFreqMode; /* 0 = Falcon frequency mode ; 1 = Ste frequency mode */
235: Uint32 int_freq_divider; /* internal frequency divider */
236: Uint32 isDacMuted; /* 0 = DAC is running; 1 = DAC is muted */
237: Uint32 dspXmit_freq; /* 0 = 25 Mhz ; 1 = external clock ; 2 = 32 Mhz */
238: Uint32 dmaPlay_freq; /* 0 = 25 Mhz ; 1 = external clock ; 2 = 32 Mhz */
239: Uint16 codecInputSource; /* codec input source */
240: Uint16 codecAdcInput; /* codec ADC input */
241: Uint16 gainSettingLeft; /* Left channel gain for ADC */
242: Uint16 gainSettingRight; /* Right channel gain for ADC */
243: Uint16 attenuationSettingLeft; /* Left channel attenuation for DAC */
244: Uint16 attenuationSettingRight; /* Right channel attenuation for DAC */
245: Uint16 microphone_ADC_is_started;
246:
247: Uint32 clock25_cycles; /* cycles for 25 Mzh interrupt */
248: Uint32 clock25_cycles_decimal; /* decimal part of cycles counter for 25 Mzh interrupt (*DECIMAL_PRECISION) */
249: Uint32 clock25_cycles_counter; /* Cycle counter for 25 Mhz interrupts */
250: Uint32 pendingCyclesOver25; /* Number of delayed cycles for the interrupt */
251: Uint32 clock32_cycles; /* cycles for 32 Mzh interrupt */
252: Uint32 clock32_cycles_decimal; /* decimal part of cycles counter for 32 Mzh interrupt (*DECIMAL_PRECISION) */
253: Uint32 clock32_cycles_counter; /* Cycle counter for 32 Mhz interrupts */
254: Uint32 pendingCyclesOver32; /* Number of delayed cycles for the interrupt */
1.1.1.4 root 255: Sint64 frequence_ratio; /* Ratio between host computer's sound frequency and hatari's sound frequency */
256: Sint64 frequence_ratio2; /* Ratio between hatari's sound frequency and host computer's sound frequency */
1.1 root 257:
258: Uint32 dmaPlay_CurrentFrameStart; /* current DmaPlay Frame start ($ff8903 $ff8905 $ff8907) */
259: Uint32 dmaPlay_CurrentFrameCount; /* current DmaRecord Frame start ($ff8903 $ff8905 $ff8907) */
260: Uint32 dmaPlay_CurrentFrameEnd; /* current DmaRecord Frame start ($ff8903 $ff8905 $ff8907) */
261: Uint32 dmaRecord_CurrentFrameStart; /* current DmaPlay Frame end ($ff890f $ff8911 $ff8913) */
262: Uint32 dmaRecord_CurrentFrameCount; /* current DmaRecord Frame start ($ff8903 $ff8905 $ff8907) */
263: Uint32 dmaRecord_CurrentFrameEnd; /* current DmaRecord Frame end ($ff890f $ff8911 $ff8913) */
1.1.1.4 root 264: Uint32 adc2dac_readBufferPosition; /* read position for direct adc->dac transfer */
265: Sint64 adc2dac_readBufferPosition_float; /* float value of read position for direct adc->dac transfer index */
1.1.1.2 root 266:
267: Uint32 save_special_transfer; /* Used in a special undocumented transfer mode (dsp sent is not in handshake mode and dsp receive is in handshake mode) */
1.1 root 268: };
269:
270: struct codec_s {
271: Sint16 buffer_left[DACBUFFER_SIZE];
272: Sint16 buffer_right[DACBUFFER_SIZE];
1.1.1.4 root 273: Sint64 readPosition_float;
1.1 root 274: Uint32 readPosition;
275: Uint32 writePosition;
276: Uint32 isConnectedToCodec;
277: Uint32 isConnectedToDsp;
278: Uint32 isConnectedToDma;
279: Uint32 wordCount;
280: };
281:
282: struct dsp_s {
283: Uint32 isTristated; /* 0 = DSP is not tristated; 1 = DSP is tristated */
284: Uint32 isInHandshakeMode; /* 0 = not in hanshake mode; 1 = in hanshake mode */
285: Uint32 isConnectedToCodec;
286: Uint32 isConnectedToDsp;
287: Uint32 isConnectedToDma;
288: Uint32 wordCount; /* count number of words received from DSP transmitter (for TX frame computing) */
289: };
290:
291: static struct crossbar_s crossbar;
292: static struct dma_s dmaPlay;
293: static struct dma_s dmaRecord;
294: static struct codec_s dac;
295: static struct codec_s adc;
296: static struct dsp_s dspXmit;
297: static struct dsp_s dspReceive;
298:
299: /**
300: * Reset Crossbar variables.
301: */
302: void Crossbar_Reset(bool bCold)
303: {
304: nCbar_DmaSoundControl = 0;
305:
306: if (bCold)
307: {
308: }
309:
310: /* Stop DMA sound playing / record */
311: IoMem_WriteByte(0xff8901,0);
312: dmaPlay.isRunning = 0;
313: dmaPlay.loopMode = 0;
314: dmaPlay.currentFrame = 0;
315: dmaPlay.isConnectedToDspInHandShakeMode = 0;
316: dmaPlay.handshakeMode_Frame = 0;
317: dmaRecord.isRunning = 0;
318: dmaRecord.loopMode = 0;
319: dmaRecord.currentFrame = 0;
320: dmaRecord.isConnectedToDspInHandShakeMode = 0;
321: dmaRecord.handshakeMode_Frame = 0;
322:
323: /* DAC inits */
324: memset(dac.buffer_left, 0, sizeof(dac.buffer_left));
325: memset(dac.buffer_right, 0, sizeof(dac.buffer_right));
1.1.1.4 root 326: dac.readPosition_float = 0;
1.1 root 327: dac.readPosition = 0;
328: dac.writePosition = 0;
329:
330: /* ADC inits */
1.1.1.2 root 331: memset(adc.buffer_left, 0, sizeof(adc.buffer_left));
332: memset(adc.buffer_right, 0, sizeof(adc.buffer_right));
1.1.1.4 root 333: adc.readPosition_float = 0;
1.1 root 334: adc.readPosition = 0;
335: adc.writePosition = 0;
336:
337: /* DSP inits */
338: dspXmit.wordCount = 0;
339:
340: /* Crossbar inits */
341: crossbar.clock25_cycles = 160;
342: crossbar.clock25_cycles_decimal = 0;
343: crossbar.clock25_cycles_counter = 0;
344: crossbar.pendingCyclesOver25 = 0;
345: crossbar.clock32_cycles = 160;
346: crossbar.clock32_cycles_decimal = 0;
347: crossbar.clock32_cycles_counter = 0;
348: crossbar.pendingCyclesOver32 = 0;
349: crossbar.frequence_ratio = 0;
350: crossbar.frequence_ratio2 = 0;
351:
352: crossbar.dmaSelected = 0;
353: crossbar.track_monitored = 0;
354: crossbar.isInSteFreqMode = 1;
355: crossbar.int_freq_divider = 0;
356: crossbar.steFreq = 3;
357: crossbar.playTracks = 1;
358: crossbar.is16Bits = 0;
359: crossbar.isStereo = 1;
360: crossbar.codecInputSource = 3;
361: crossbar.codecAdcInput = 3;
362: crossbar.gainSettingLeft = 3276;
363: crossbar.gainSettingRight = 3276;
364: crossbar.attenuationSettingLeft = 65535;
365: crossbar.attenuationSettingRight = 65535;
1.1.1.4 root 366: crossbar.adc2dac_readBufferPosition = 0;
367: crossbar.adc2dac_readBufferPosition_float = 0;
1.1 root 368:
369: /* Start 25 Mhz and 32 Mhz Clocks */
370: Crossbar_Recalculate_Clocks_Cycles();
371: Crossbar_Start_InterruptHandler_25Mhz();
372: Crossbar_Start_InterruptHandler_32Mhz();
373:
374: /* Start Microphone jack emulation */
375: if (crossbar.microphone_ADC_is_started == 0) {
376: crossbar.microphone_ADC_is_started = Microphone_Start((int)nAudioFrequency);
377: }
378:
1.1.1.2 root 379: /* Initialize special transfer mode */
380: crossbar.save_special_transfer = 0;
381:
1.1 root 382: /* Initialize Crossbar values after reboot */
383: IoMem_WriteByte(0xff8900,0x05);
384: IoMem_WriteByte(0xff8903,0xff);
385: IoMem_WriteByte(0xff8905,0xff);
386: IoMem_WriteByte(0xff8907,0xfe);
387: IoMem_WriteByte(0xff8909,0xff);
388: IoMem_WriteByte(0xff890b,0xff);
389: IoMem_WriteByte(0xff890d,0xfe);
390: IoMem_WriteByte(0xff890f,0xff);
391: IoMem_WriteByte(0xff8911,0xff);
392: IoMem_WriteByte(0xff8913,0xfe);
393: IoMem_WriteWord(0xff893c,0x2401);
394: }
395:
396: /**
397: * Save/Restore snapshot of local variables ('MemorySnapShot_Store' handles type)
398: */
399: void Crossbar_MemorySnapShot_Capture(bool bSave)
400: {
401: /* Save/Restore details */
402: MemorySnapShot_Store(&nCbar_DmaSoundControl, sizeof(nCbar_DmaSoundControl));
403: MemorySnapShot_Store(&dmaPlay, sizeof(dmaPlay));
404: MemorySnapShot_Store(&dmaRecord, sizeof(dmaRecord));
405: MemorySnapShot_Store(&crossbar, sizeof(crossbar));
406: MemorySnapShot_Store(&dac, sizeof(dac));
407: MemorySnapShot_Store(&adc, sizeof(adc));
408: MemorySnapShot_Store(&dspXmit, sizeof(dspXmit));
409: MemorySnapShot_Store(&dspReceive, sizeof(dspReceive));
410: }
411:
412:
413: /*----------------------------------------------------------------------*/
414: /* Hardware I/O functions */
415: /*----------------------------------------------------------------------*/
416:
417: /**
1.1.1.4 root 418: * Write byte to Microwire Mask register(0xff8924).
419: * Note: On Falcon, the Microwire is not present.
420: * But for compatibility with the STe, Atari implemented the Microwire
421: * as follow (when one writes at the following address):
422: * $ff8922: always reads 0 for any value written at this address
423: * $ff8924: NOT the value, then 8 cycles later, NOT the value again to its initial value.
424: */
425: void Crossbar_Microwire_WriteWord(void)
426: {
427: Uint16 microwire = IoMem_ReadWord(0xff8924);
428: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8924 (MicroWire Mask) write: 0x%04x\n", microwire);
429:
430: /* NOT the value and store it */
431: microwire = ~microwire;
432: IoMem_WriteWord(0xff8924, microwire);
433: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8924 (MicroWire Mask) NOT value: 0x%04x\n", microwire);
434:
435: /* Start a new Microwire interrupt */
436: CycInt_AddRelativeInterrupt(8, INT_CPU_CYCLE, INTERRUPT_DMASOUND_MICROWIRE);
437: }
438:
439: /**
440: * Crossbar Microwire mask interrupt, called from dmaSnd.c
441: */
442: void Crossbar_InterruptHandler_Microwire(void)
443: {
444: Uint16 microwire = IoMem_ReadWord(0xff8924);
445:
446: /* Remove this interrupt from list and re-order */
447: CycInt_AcknowledgeInterrupt();
448:
449: /* NOT the value again to it's original value and store it */
450: microwire = ~microwire;
451: IoMem_WriteWord(0xff8924, microwire);
452: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8924 (MicroWire Mask) NOT value to original: 0x%04x\n", microwire);
453: }
454:
455: /**
1.1 root 456: * Write byte to buffer interrupts (0xff8900).
457: */
458: void Crossbar_BufferInter_WriteByte(void)
459: {
460: Uint8 dmaCtrl = IoMem_ReadByte(0xff8900);
461:
462: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8900 (Sound DMA control) write: 0x%02x\n", dmaCtrl);
463:
464: dmaPlay.timerA_int = (dmaCtrl & 0x4) >> 2;
465: dmaPlay.mfp15_int = (dmaCtrl & 0x1);
466: dmaRecord.timerA_int = (dmaCtrl & 0x8) >> 3;
467: dmaRecord.mfp15_int = (dmaCtrl & 0x2) >> 1;
468: }
469:
470: /**
471: * Write byte from DMA control register (0xff8901).
472: */
473: void Crossbar_DmaCtrlReg_WriteByte(void)
474: {
475: Uint8 sndCtrl = IoMem_ReadByte(0xff8901);
476:
477: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8901 (additional Sound DMA control) write: 0x%02x\n", sndCtrl);
478:
479: crossbar.dmaSelected = (sndCtrl & 0x80) >> 7;
480:
481: /* DMA Play mode */
482: if ((dmaPlay.isRunning == 0) && (sndCtrl & CROSSBAR_SNDCTRL_PLAY))
483: {
484: /* Turning on DMA Play sound emulation */
485: dmaPlay.isRunning = 1;
486: nCbar_DmaSoundControl = sndCtrl;
487: dmaPlay.loopMode = (sndCtrl & 0x2) >> 1;
488: Crossbar_setDmaPlay_Settings();
489: }
490: else if (dmaPlay.isRunning && ((sndCtrl & CROSSBAR_SNDCTRL_PLAY) == 0))
491: {
492: /* Create samples up until this point with current values */
1.1.1.2 root 493: Sound_Update(false);
1.1 root 494:
495: /* Turning off DMA play sound emulation */
496: dmaPlay.isRunning = 0;
497: dmaPlay.loopMode = 0;
498: nCbar_DmaSoundControl = sndCtrl;
499: }
500:
501: /* DMA Record mode */
502: if ((dmaRecord.isRunning == 0) && (sndCtrl & CROSSBAR_SNDCTRL_RECORD))
503: {
504: /* Turning on DMA record sound emulation */
505: dmaRecord.isRunning = 1;
506: nCbar_DmaSoundControl = sndCtrl;
1.1.1.2 root 507: dmaRecord.loopMode = (sndCtrl & 0x20) >> 5;
1.1 root 508: Crossbar_setDmaRecord_Settings();
509: }
510: else if (dmaRecord.isRunning && ((sndCtrl & CROSSBAR_SNDCTRL_RECORD) == 0))
511: {
512: /* Turning off DMA record sound emulation */
513: dmaRecord.isRunning = 0;
514: dmaRecord.loopMode = 0;
1.1.1.2 root 515: nCbar_DmaSoundControl = sndCtrl;
1.1 root 516: }
517: }
518:
519:
520: /**
521: * Read byte from sound frame start high register (0xff8903).
522: */
523: void Crossbar_FrameStartHigh_ReadByte(void)
524: {
525: if (crossbar.dmaSelected == 0) {
526: /* DMA Play selected */
527: IoMem_WriteByte(0xff8903, crossbar.dmaPlay_CurrentFrameStart >> 16);
528: }
529: else {
530: /* DMA Record selected */
531: IoMem_WriteByte(0xff8903, crossbar.dmaRecord_CurrentFrameStart >> 16);
532: }
533: }
534:
535: /**
536: * Write byte to sound frame start high register (0xff8903).
537: */
538: void Crossbar_FrameStartHigh_WriteByte(void)
539: {
540: Uint32 addr;
541:
542: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8903 (Sound frame start high) write: 0x%02x\n", IoMem_ReadByte(0xff8903));
543:
544: addr = (IoMem_ReadByte(0xff8903) << 16) + (IoMem_ReadByte(0xff8905) << 8) + IoMem_ReadByte(0xff8907);
545:
546: if (crossbar.dmaSelected == 0) {
547: /* DMA Play selected */
548: crossbar.dmaPlay_CurrentFrameStart = addr & ~1;
549: }
550: else {
551: /* DMA Record selected */
552: crossbar.dmaRecord_CurrentFrameStart = addr & ~1;
553: }
554: }
555:
556: /**
557: * Read byte from sound frame start medium register (0xff8905).
558: */
559: void Crossbar_FrameStartMed_ReadByte(void)
560: {
561: if (crossbar.dmaSelected == 0) {
562: /* DMA Play selected */
563: IoMem_WriteByte(0xff8905, crossbar.dmaPlay_CurrentFrameStart >> 8);
564: }
565: else {
566: /* DMA Record selected */
567: IoMem_WriteByte(0xff8905, crossbar.dmaRecord_CurrentFrameStart >> 8);
568: }
569: }
570:
571: /**
572: * Write byte to sound frame start medium register (0xff8905).
573: */
574: void Crossbar_FrameStartMed_WriteByte(void)
575: {
576: Uint32 addr;
577:
578: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8905 (Sound frame start med) write: 0x%02x\n", IoMem_ReadByte(0xff8905));
579:
580: addr = (IoMem_ReadByte(0xff8903) << 16) + (IoMem_ReadByte(0xff8905) << 8) + IoMem_ReadByte(0xff8907);
581:
582: if (crossbar.dmaSelected == 0) {
583: /* DMA Play selected */
584: crossbar.dmaPlay_CurrentFrameStart = addr & ~1;
585: }
586: else {
587: /* DMA Record selected */
588: crossbar.dmaRecord_CurrentFrameStart = addr & ~1;
589: }
590: }
591:
592: /**
593: * Read byte from sound frame start low register (0xff8907).
594: */
595: void Crossbar_FrameStartLow_ReadByte(void)
596: {
597: if (crossbar.dmaSelected == 0) {
598: /* DMA Play selected */
599: IoMem_WriteByte(0xff8907, crossbar.dmaPlay_CurrentFrameStart);
600: }
601: else {
602: /* DMA Record selected */
603: IoMem_WriteByte(0xff8907, crossbar.dmaRecord_CurrentFrameStart);
604: }
605: }
606:
607: /**
608: * Write byte to sound frame start low register (0xff8907).
609: */
610: void Crossbar_FrameStartLow_WriteByte(void)
611: {
612: Uint32 addr;
613:
614: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8907 (Sound frame start low) write: 0x%02x\n", IoMem_ReadByte(0xff8907));
615:
616: addr = (IoMem_ReadByte(0xff8903) << 16) + (IoMem_ReadByte(0xff8905) << 8) + IoMem_ReadByte(0xff8907);
617:
618: if (crossbar.dmaSelected == 0) {
619: /* DMA Play selected */
620: crossbar.dmaPlay_CurrentFrameStart = addr & ~1;
621: }
622: else {
623: /* DMA Record selected */
624: crossbar.dmaRecord_CurrentFrameStart = addr & ~1;
625: }
626: }
627:
628: /*-----------------------------------------------------------------------*/
629:
630: /**
631: * Read byte from sound frame count high register (0xff8909).
632: */
633: void Crossbar_FrameCountHigh_ReadByte(void)
634: {
635: if (crossbar.dmaSelected == 0) {
636: /* DMA Play selected */
637: IoMem_WriteByte(0xff8909, (dmaPlay.frameStartAddr + dmaPlay.frameCounter) >> 16);
638: }
639: else {
640: /* DMA Record selected */
641: IoMem_WriteByte(0xff8909, (dmaRecord.frameStartAddr + dmaRecord.frameCounter) >> 16);
642: }
643: }
644:
645: /**
646: * Write byte to sound frame count high register (0xff8909).
647: */
648: void Crossbar_FrameCountHigh_WriteByte(void)
649: {
650: Uint32 addr;
651:
652: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8909 (Sound frame count high) write: 0x%02x\n", IoMem_ReadByte(0xff8909));
653:
654: /* Compute frameCounter current address */
655: addr = (IoMem_ReadByte(0xff8909) << 16) + (IoMem_ReadByte(0xff890b) << 8) + IoMem_ReadByte(0xff890d);
656:
657: if (crossbar.dmaSelected == 0) {
658: /* DMA Play selected */
659: crossbar.dmaPlay_CurrentFrameCount = addr;
660: }
661: else {
662: /* DMA Record selected */
663: crossbar.dmaRecord_CurrentFrameCount = addr;
664: }
665: }
666:
667: /**
668: * Read byte from sound frame count medium register (0xff890b).
669: */
670: void Crossbar_FrameCountMed_ReadByte(void)
671: {
672: if (crossbar.dmaSelected == 0) {
673: /* DMA Play selected */
674: IoMem_WriteByte(0xff890b, (dmaPlay.frameStartAddr + dmaPlay.frameCounter) >> 8);
675: }
676: else {
677: /* DMA Record selected */
678: IoMem_WriteByte(0xff890b, (dmaRecord.frameStartAddr + dmaRecord.frameCounter) >> 8);
679: }
680: }
681:
682: /**
683: * Write byte to sound frame count medium register (0xff890b).
684: */
685: void Crossbar_FrameCountMed_WriteByte(void)
686: {
687: Uint32 addr;
688:
689: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff890b (Sound frame count med) write: 0x%02x\n", IoMem_ReadByte(0xff890b));
690:
691: /* Compute frameCounter current address */
692: addr = (IoMem_ReadByte(0xff8909) << 16) + (IoMem_ReadByte(0xff890b) << 8) + IoMem_ReadByte(0xff890d);
693:
694: if (crossbar.dmaSelected == 0) {
695: /* DMA Play selected */
696: crossbar.dmaPlay_CurrentFrameCount = addr;
697: }
698: else {
699: /* DMA Record selected */
700: crossbar.dmaRecord_CurrentFrameCount = addr;
701: }
702: }
703:
704: /**
705: * Read byte from sound frame count low register (0xff890d).
706: */
707: void Crossbar_FrameCountLow_ReadByte(void)
708: {
709: if (crossbar.dmaSelected == 0) {
710: /* DMA Play selected */
711: IoMem_WriteByte(0xff890d, (dmaPlay.frameStartAddr + dmaPlay.frameCounter));
712: }
713: else {
714: /* DMA Record selected */
715: IoMem_WriteByte(0xff890d, (dmaRecord.frameStartAddr + dmaRecord.frameCounter));
716: }
717: }
718:
719: /**
720: * Write byte to sound frame count low register (0xff890d).
721: */
722: void Crossbar_FrameCountLow_WriteByte(void)
723: {
724: Uint32 addr;
725:
726: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff890d (Sound frame count low) write: 0x%02x\n", IoMem_ReadByte(0xff890d));
727:
728: /* Compute frameCounter current address */
729: addr = (IoMem_ReadByte(0xff8909) << 16) + (IoMem_ReadByte(0xff890b) << 8) + IoMem_ReadByte(0xff890d);
730:
731: if (crossbar.dmaSelected == 0) {
732: /* DMA Play selected */
733: crossbar.dmaPlay_CurrentFrameCount = addr;
734: }
735: else {
736: /* DMA Record selected */
737: crossbar.dmaRecord_CurrentFrameCount = addr;
738: }
739: }
740:
741: /*-----------------------------------------------------------------------*/
742:
743: /**
744: * Read byte from sound frame end high register (0xff890f).
745: */
746: void Crossbar_FrameEndHigh_ReadByte(void)
747: {
748: if (crossbar.dmaSelected == 0) {
749: /* DMA Play selected */
750: IoMem_WriteByte(0xff890f, crossbar.dmaPlay_CurrentFrameEnd >> 16);
751: }
752: else {
753: /* DMA Record selected */
754: IoMem_WriteByte(0xff890f, crossbar.dmaRecord_CurrentFrameEnd >> 16);
755: }
756: }
757:
758: /**
759: * Write byte to sound frame end high register (0xff890f).
760: */
761: void Crossbar_FrameEndHigh_WriteByte(void)
762: {
763: Uint32 addr;
764:
765: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff890f (Sound frame end high) write: 0x%02x\n", IoMem_ReadByte(0xff890f));
766:
767: addr = (IoMem_ReadByte(0xff890f) << 16) + (IoMem_ReadByte(0xff8911) << 8) + IoMem_ReadByte(0xff8913);
768:
769: if (crossbar.dmaSelected == 0) {
770: /* DMA Play selected */
771: crossbar.dmaPlay_CurrentFrameEnd = addr & ~1;
772: }
773: else {
774: /* DMA Record selected */
775: crossbar.dmaRecord_CurrentFrameEnd = addr & ~1;
776: }
777: }
778:
779: /**
780: * Read byte from sound frame end medium register (0xff8911).
781: */
782: void Crossbar_FrameEndMed_ReadByte(void)
783: {
784: if (crossbar.dmaSelected == 0) {
785: /* DMA Play selected */
786: IoMem_WriteByte(0xff8911, crossbar.dmaPlay_CurrentFrameEnd >> 8);
787: }
788: else {
789: /* DMA Record selected */
790: IoMem_WriteByte(0xff8911, crossbar.dmaRecord_CurrentFrameEnd >> 8);
791: }
792: }
793:
794: /**
795: * Write byte to sound frame end medium register (0xff8911).
796: */
797: void Crossbar_FrameEndMed_WriteByte(void)
798: {
799: Uint32 addr;
800:
801: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8911 (Sound frame end med) write: 0x%02x\n", IoMem_ReadByte(0xff8911));
802:
803: addr = (IoMem_ReadByte(0xff890f) << 16) + (IoMem_ReadByte(0xff8911) << 8) + IoMem_ReadByte(0xff8913);
804:
805: if (crossbar.dmaSelected == 0) {
806: /* DMA Play selected */
807: crossbar.dmaPlay_CurrentFrameEnd = addr & ~1;
808: }
809: else {
810: /* DMA Record selected */
811: crossbar.dmaRecord_CurrentFrameEnd = addr & ~1;
812: }
813: }
814:
815: /**
816: * Read byte from sound frame end low register (0xff8913).
817: */
818: void Crossbar_FrameEndLow_ReadByte(void)
819: {
820: if (crossbar.dmaSelected == 0) {
821: /* DMA Play selected */
822: IoMem_WriteByte(0xff8913, crossbar.dmaPlay_CurrentFrameEnd);
823: }
824: else {
825: /* DMA Record selected */
826: IoMem_WriteByte(0xff8913, crossbar.dmaRecord_CurrentFrameEnd);
827: }
828: }
829:
830: /**
831: * Write byte to sound frame end low register (0xff8913).
832: */
833: void Crossbar_FrameEndLow_WriteByte(void)
834: {
835: Uint32 addr;
836:
837: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8913 (Sound frame end low) write: 0x%02x\n", IoMem_ReadByte(0xff8913));
838:
839: addr = (IoMem_ReadByte(0xff890f) << 16) + (IoMem_ReadByte(0xff8911) << 8) + IoMem_ReadByte(0xff8913);
840:
841: if (crossbar.dmaSelected == 0) {
842: /* DMA Play selected */
843: crossbar.dmaPlay_CurrentFrameEnd = addr & ~1;
844: }
845: else {
846: /* DMA Record selected */
847: crossbar.dmaRecord_CurrentFrameEnd = addr & ~1;
848: }
849: }
850:
851: /*-----------------------------------------------------------------------*/
852: /**
853: * Write byte to DMA track control (0xff8920).
854: */
855: void Crossbar_DmaTrckCtrl_WriteByte(void)
856: {
857: Uint8 sndCtrl = IoMem_ReadByte(0xff8920);
858:
859: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8920 (sound mode control) write: 0x%02x\n", sndCtrl);
860:
861: crossbar.playTracks = (sndCtrl & 3) + 1;
862: crossbar.track_monitored = (sndCtrl & 30) >> 4;
863: }
864:
865: /**
866: * Write word to sound mode register (0xff8921).
867: */
868: void Crossbar_SoundModeCtrl_WriteByte(void)
869: {
870: Uint8 sndCtrl = IoMem_ReadByte(0xff8921);
871:
872: LOG_TRACE(TRACE_CROSSBAR, "crossbar : $ff8921 (additional sound mode control) write: 0x%02x\n", sndCtrl);
873:
874: crossbar.is16Bits = (sndCtrl & 0x40) >> 6;
875: crossbar.isStereo = 1 - ((sndCtrl & 0x80) >> 7);
876: crossbar.steFreq = sndCtrl & 0x3;
877:
878: Crossbar_Recalculate_Clocks_Cycles();
879: }
880:
881: /**
882: * Write word to Falcon Crossbar source controller (0xff8930).
883: Source: A/D Convertor BIT 15 14 13 12
884: 00 - 25.175Mhz clock -------------------------+--+
885: 01 - External clock --------------------------+--+
886: 10 - 32Mhz clock (Don't use) -----------------+--'
887:
888: Source: External Input BIT 11 10 9 8
889: 0 - DSP IN, 1 - All others ----------------' | | |
890: 00 - 25.175Mhz clock -------------------------+--+ |
891: 01 - External clock --------------------------+--+ |
892: 10 - 32Mhz clock -----------------------------+--' |
893: 0 - Handshake on, 1 - Handshake off ----------------'
894:
895: Source: DSP-XMIT BIT 7 6 5 4
896: 0 - Tristate and disconnect DSP -----------+ | | |
897: (Only for external SSI use) | | | |
898: 1 - Connect DSP to multiplexer ------------' | | |
899: 00 - 25.175Mhz clock -------------------------+--+ |
900: 01 - External clock --------------------------+--+ |
901: 10 - 32Mhz clock -----------------------------+--' |
902: 0 - Handshake on, 1 - Handshake off ----------------'
903:
904: Source: DMA-PLAYBACK BIT 3 2 1 0
905: 0 - Handshaking on, dest DSP-REC ----------+ | | |
906: 1 - Destination is not DSP-REC ------------' | | |
907: 00 - 25.175Mhz clock -------------------------+--+ |
908: 01 - External clock --------------------------+--+ |
909: 10 - 32Mhz clock -----------------------------+--' |
910: 0 - Handshake on, 1 - Handshake off ----------------'
911: */
912: void Crossbar_SrcControler_WriteWord(void)
913: {
914: Uint16 nCbSrc = IoMem_ReadWord(0xff8930);
915:
916: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8930 (source device) write: 0x%04x\n", nCbSrc);
917:
918: dspXmit.isTristated = 1 - ((nCbSrc >> 7) & 0x1);
919: dspXmit.isInHandshakeMode = 1 - ((nCbSrc >> 4) & 0x1);
920:
921: crossbar.dspXmit_freq = (nCbSrc >> 5) & 0x3;
922: crossbar.dmaPlay_freq = (nCbSrc >> 1) & 0x3;
923: }
924:
925: /**
926: * Write word to Falcon Crossbar destination controller (0xff8932).
927: Source: D/A Convertor BIT 15 14 13 12
1.1.1.2 root 928: 00 - DMA output ------------------------------+--+
929: 01 - DSP output ------------------------------+--+
930: 10 - External input --------------------------+--+
931: 11 - ADC input -------------------------------+--'
1.1 root 932:
933: Source: External OutPut BIT 11 10 9 8
934: 0 - DSP OUT, 1 - All others ---------------' | | |
935: 00 - DMA output ------------------------------+--+ |
936: 01 - DSP output ------------------------------+--+ |
937: 10 - External input --------------------------+--+ |
938: 11 - ADC input -------------------------------+--' |
939: 0 - Handshake on, 1 - Handshake off ----------------'
940:
941: Source: DSP-RECEIVE BIT 7 6 5 4
942: 0 - Tristate and disconnect DSP -----------+ | | |
943: (Only for external SSI use) | | | |
944: 1 - Connect DSP to multiplexer ------------' | | |
945: 00 - DMA output ------------------------------+--+ |
946: 01 - DSP output ------------------------------+--+ |
947: 10 - External input --------------------------+--+ |
948: 11 - ADC input -------------------------------+--' |
949: 0 - Handshake on, 1 - Handshake off ----------------'
950:
951: Source: DMA-RECORD BIT 3 2 1 0
952: 0 - Handshaking on, dest DSP-XMIT ---------+ | | |
953: 1 - All -----------------------------------' | | |
954: 00 - DMA output ------------------------------+--+ |
955: 01 - DSP output ------------------------------+--+ |
956: 10 - External input --------------------------+--+ |
957: 11 - ADC input -------------------------------+--' |
958: 0 - Handshake on, 1 - Handshake off ----------------'
959: */
960: void Crossbar_DstControler_WriteWord(void)
961: {
962: Uint16 destCtrl = IoMem_ReadWord(0xff8932);
963:
964: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8932 (destination device) write: 0x%04x\n", destCtrl);
965:
966: dspReceive.isTristated = 1 - ((destCtrl & 0x80) >> 7);
967: dspReceive.isInHandshakeMode = 1 - ((destCtrl & 0x10) >> 4);
968:
969: /* destinations devices connexions */
970: dspReceive.isConnectedToCodec = (destCtrl & 0x60) == 0x60 ? 1 : 0;
971: dspReceive.isConnectedToDsp = (destCtrl & 0x60) == 0x20 ? 1 : 0;
972: dspReceive.isConnectedToDma = (destCtrl & 0x60) == 0x00 ? 1 : 0;
973:
974: dmaRecord.isConnectedToCodec = (destCtrl & 0x6) == 0x6 ? 1 : 0;
975: dmaRecord.isConnectedToDsp = (destCtrl & 0x6) == 0x2 ? 1 : 0;
976: dmaRecord.isConnectedToDma = (destCtrl & 0x6) == 0x0 ? 1 : 0;
977:
978: dac.isConnectedToCodec = (destCtrl & 0x6000) == 0x6000 ? 1 : 0;
979: dac.isConnectedToDsp = (destCtrl & 0x6000) == 0x2000 ? 1 : 0;
980: dac.isConnectedToDma = (destCtrl & 0x6000) == 0x0000 ? 1 : 0;
981:
982: /* sources devices connexions */
983: dspXmit.isConnectedToCodec = (destCtrl & 0x6000) == 0x2000 ? 1 : 0;
984: dspXmit.isConnectedToDsp = (destCtrl & 0x60) == 0x20 ? 1 : 0;
985: dspXmit.isConnectedToDma = (destCtrl & 0x6) == 0x2 ? 1 : 0;
986:
987: dmaPlay.isConnectedToCodec = (destCtrl & 0x6000) == 0x0000 ? 1 : 0;
988: dmaPlay.isConnectedToDsp = (destCtrl & 0x60) == 0x00 ? 1 : 0;
989: dmaPlay.isConnectedToDma = (destCtrl & 0x6) == 0x0 ? 1 : 0;
990:
991: adc.isConnectedToCodec = (destCtrl & 0x6000) == 0x6000 ? 1 : 0;
992: adc.isConnectedToDsp = (destCtrl & 0x60) == 0x60 ? 1 : 0;
993: adc.isConnectedToDma = (destCtrl & 0x6) == 0x6 ? 1 : 0;
994:
1.1.1.2 root 995: dmaPlay.isConnectedToDspInHandShakeMode = (((destCtrl >> 4) & 7) == 0 ? 1 : 0);
1.1.1.3 root 996: dmaPlay.handshakeMode_Frame = dmaPlay.isConnectedToDspInHandShakeMode;
997:
1.1 root 998: dmaRecord.isConnectedToDspInHandShakeMode = ((destCtrl & 0xf) == 2 ? 1 : 0);
999: }
1000:
1001: /**
1002: * Write byte to external clock divider register (0xff8934).
1003: */
1004: void Crossbar_FreqDivExt_WriteByte(void)
1005: {
1006: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8934 (ext. clock divider) write: 0x%02x\n", IoMem_ReadByte(0xff8934));
1007: }
1008:
1009: /**
1010: * Write byte to internal clock divider register (0xff8935).
1011: */
1012: void Crossbar_FreqDivInt_WriteByte(void)
1013: {
1014: Uint8 clkDiv = IoMem_ReadByte(0xff8935);
1015:
1016: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8935 (int. clock divider) write: 0x%02x\n", clkDiv);
1017:
1018: crossbar.int_freq_divider = clkDiv & 0xf;
1019: Crossbar_Recalculate_Clocks_Cycles();
1020: }
1021:
1022: /**
1023: * Write byte to record track select register (0xff8936).
1024: * 0 = Record 1 track
1025: * 1 = Record 2 tracks
1026: * 2 = Record 3 tracks
1027: * 3 = Record 4 tracks
1028: */
1029: void Crossbar_TrackRecSelect_WriteByte(void)
1030: {
1031: Uint8 recTrack = IoMem_ReadByte(0xff8936);
1032:
1033: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8936 (record track select) write: 0x%02x\n", recTrack);
1034:
1035: crossbar.recordTracks = recTrack & 3;
1036: }
1037:
1038: /**
1039: * Write byte to CODEC input source from 16 bit adder (0xff8937).
1040: * Bit 1 : source = multiplexer
1041: * Bit 0 : source = A/D convertor
1042: */
1043: void Crossbar_CodecInput_WriteByte(void)
1044: {
1045: Uint8 inputSource = IoMem_ReadByte(0xff8937);
1046:
1047: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8937 (CODEC input) write: 0x%02x\n", IoMem_ReadByte(0xff8937));
1048:
1049: crossbar.codecInputSource = inputSource & 3;
1050: }
1051:
1052: /**
1053: * Write byte to A/D converter input for L+R channel (0xff8938).
1054: * Bit 1 : Left (0 = Microphone ; 1 = PSG soundchip)
1055: * Bit 0 : Right (0 = Microphone ; 1 = PSG soundchip)
1056: */
1057: void Crossbar_AdcInput_WriteByte(void)
1058: {
1059: Uint8 input = IoMem_ReadByte(0xff8938);
1060:
1061: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8938 (ADC input) write: 0x%02x\n", IoMem_ReadByte(0xff8938));
1062:
1063: crossbar.codecAdcInput = input & 3;
1064: }
1065:
1066: /**
1067: * Write byte to input amplifier register (amplification for ADC device) (0xff8939).
1068: * Bits LLLLRRRR
1069: * Amplification is in +1.5 dB steps
1070: */
1071: void Crossbar_InputAmp_WriteByte(void)
1072: {
1073: Uint8 amplification = IoMem_ReadByte(0xff8939);
1074:
1075: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff8939 (CODEC channel amplification) write: 0x%02x\n", IoMem_ReadByte(0xff8939));
1076:
1077: crossbar.gainSettingLeft = Crossbar_ADC_volume_table[amplification >> 4];
1078: crossbar.gainSettingRight = Crossbar_ADC_volume_table[amplification & 0xf];
1079: }
1080:
1081: /**
1082: * Write byte to channel reduction register (attenuation for DAC device) (0xff893a).
1.1.1.5 root 1083: * Bits XXXXLLLL RRRRXXXX
1.1 root 1084: * Reduction is in -1.5 dB steps
1085: */
1.1.1.5 root 1086: void Crossbar_OutputReduct_WriteWord(void)
1.1 root 1087: {
1.1.1.5 root 1088: Uint16 reduction = IoMem_ReadWord(0xff893a);
1.1 root 1089:
1.1.1.5 root 1090: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff893a (CODEC channel attenuation) write: 0x%04x\n", reduction);
1.1 root 1091:
1.1.1.5 root 1092: crossbar.attenuationSettingLeft = Crossbar_DAC_volume_table[(reduction >> 8) & 0x0f];
1093: crossbar.attenuationSettingRight = Crossbar_DAC_volume_table[(reduction >> 4) & 0x0f];
1.1 root 1094: }
1095:
1096: /**
1097: * Write word to CODEC status register (0xff893c).
1098: * Bit 1 : Left Channel Overflow (0/1)
1099: * Bit 0 : Right Channel Overflow (0/1)
1100: */
1101: void Crossbar_CodecStatus_WriteWord(void)
1102: {
1103: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : $ff893c (CODEC status) write: 0x%04x\n", IoMem_ReadWord(0xff893c));
1104: }
1105:
1106:
1107:
1108: /*----------------------------------------------------------------------*/
1109: /*------------------------- Crossbar functions -------------------------*/
1110: /*----------------------------------------------------------------------*/
1111:
1112: /**
1113: * Recalculates internal clocks 25 Mhz and 32 Mhz cycles
1114: */
1115: static void Crossbar_Recalculate_Clocks_Cycles(void)
1116: {
1117: double cyclesClk;
1118:
1119: crossbar.clock25_cycles_counter = 0;
1120: crossbar.clock32_cycles_counter = 0;
1121:
1122: /* Calculate 25 Mhz clock cycles */
1123: cyclesClk = ((double)CPU_FREQ / Crossbar_DetectSampleRate(25)) / (double)(crossbar.playTracks) / 2.0;
1124: crossbar.clock25_cycles = (int)(cyclesClk);
1125: crossbar.clock25_cycles_decimal = (int)((cyclesClk - (double)(crossbar.clock25_cycles)) * (double)DECIMAL_PRECISION);
1126:
1127: /* Calculate 32 Mhz clock cycles */
1128: cyclesClk = ((double)CPU_FREQ / Crossbar_DetectSampleRate(32)) / (double)(crossbar.playTracks) / 2.0;
1129: crossbar.clock32_cycles = (int)(cyclesClk);
1130: crossbar.clock32_cycles_decimal = (int)((cyclesClk - (double)(crossbar.clock32_cycles)) * (double)DECIMAL_PRECISION);
1131:
1132: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : Recalculate_clock_Cycles\n");
1133: LOG_TRACE(TRACE_CROSSBAR, " clock25 : %d\n", crossbar.clock25_cycles);
1134: LOG_TRACE(TRACE_CROSSBAR, " clock32 : %d\n", crossbar.clock32_cycles);
1135:
1136: /* Verify if the new frequency doesn't mute the DAC */
1137: crossbar.isDacMuted = 0;
1138: if ((crossbar.int_freq_divider == 0) && (crossbar.steFreq == 0))
1139: crossbar.isDacMuted = 1;
1140:
1141: if ((crossbar.int_freq_divider == 6) || (crossbar.int_freq_divider == 8) ||
1142: (crossbar.int_freq_divider == 10) || (crossbar.int_freq_divider >= 12)) {
1143: crossbar.isDacMuted = 1;
1.1.1.4 root 1144: LOG_TRACE(TRACE_CROSSBAR, " DAC is muted\n");
1.1 root 1145: }
1.1.1.2 root 1146:
1147: // Compute Ratio between host computer sound frequency and Hatari's sound frequency.
1148: Crossbar_Compute_Ratio();
1149: }
1150:
1151: /**
1.1.1.4 root 1152: * Compute Ratio between host computer sound frequency and Hatari's DAC sound frequency and
1153: * ratio between hatari's DAC sound frequency and host's sound frequency.
1154: * Both values use << 32 to simulate floating point precision
1.1.1.2 root 1155: * Can be called by audio.c if a sound frequency value is changed in the parameter GUI.
1156: */
1157: void Crossbar_Compute_Ratio(void)
1158: {
1.1.1.4 root 1159: crossbar.frequence_ratio = ( ((Sint64)Crossbar_DetectSampleRate(25)) << 32) / nAudioFrequency;
1160: crossbar.frequence_ratio2 = ( ((Sint64)nAudioFrequency) << 32) / Crossbar_DetectSampleRate(25);
1.1 root 1161: }
1162:
1163: /**
1164: * Detect sample rate frequency
1165: * clock : value of the internal clock (25 or 32).
1166: */
1.1.1.4 root 1167: static int Crossbar_DetectSampleRate(Uint16 clock)
1.1 root 1168: {
1169: /* Ste compatible sound */
1170: if (crossbar.int_freq_divider == 0) {
1171: crossbar.isInSteFreqMode = 1;
1172: return Ste_SampleRates[crossbar.steFreq];
1173: }
1174:
1175: crossbar.isInSteFreqMode = 0;
1176:
1177: /* 25 Mhz internal clock */
1178: if (clock == 25)
1179: return Falcon_SampleRates_25Mhz[crossbar.int_freq_divider - 1];
1180:
1181: /* 32 Mhz internal clock */
1182: return Falcon_SampleRates_32Mhz[crossbar.int_freq_divider - 1];
1183: }
1184:
1185: /**
1186: * Start internal 25 Mhz clock interrupt.
1187: */
1188: static void Crossbar_Start_InterruptHandler_25Mhz(void)
1189: {
1190: Uint32 cycles_25;
1191:
1192: cycles_25 = crossbar.clock25_cycles;
1193: crossbar.clock25_cycles_counter += crossbar.clock25_cycles_decimal;
1194:
1195: if (crossbar.clock25_cycles_counter >= DECIMAL_PRECISION) {
1196: crossbar.clock25_cycles_counter -= DECIMAL_PRECISION;
1197: cycles_25 ++;
1198: }
1199:
1200: if (crossbar.pendingCyclesOver25 >= cycles_25) {
1201: crossbar.pendingCyclesOver25 -= cycles_25;
1202: cycles_25 = 0;
1203: }
1204: else {
1205: cycles_25 -= crossbar.pendingCyclesOver25;
1206: crossbar.pendingCyclesOver25 = 0;
1207: }
1208:
1209: CycInt_AddRelativeInterrupt(cycles_25, INT_CPU_CYCLE, INTERRUPT_CROSSBAR_25MHZ);
1210: }
1211:
1212: /**
1213: * Start internal 32 Mhz clock interrupt.
1214: */
1215: static void Crossbar_Start_InterruptHandler_32Mhz(void)
1216: {
1217: Uint32 cycles_32;
1218:
1219: cycles_32 = crossbar.clock32_cycles;
1220: crossbar.clock32_cycles_counter += crossbar.clock32_cycles_decimal;
1221:
1222: if (crossbar.clock32_cycles_counter >= DECIMAL_PRECISION) {
1223: crossbar.clock32_cycles_counter -= DECIMAL_PRECISION;
1224: cycles_32 ++;
1225: }
1226:
1227: if (crossbar.pendingCyclesOver32 >= cycles_32){
1228: crossbar.pendingCyclesOver32 -= cycles_32;
1229: cycles_32 = 0;
1230: }
1231: else {
1232: cycles_32 -= crossbar.pendingCyclesOver32;
1233: crossbar.pendingCyclesOver32 = 0;
1234: }
1235:
1236: CycInt_AddRelativeInterrupt(cycles_32, INT_CPU_CYCLE, INTERRUPT_CROSSBAR_32MHZ);
1237: }
1238:
1239:
1240: /**
1241: * Execute transfers for internal 25 Mhz clock.
1242: */
1243: void Crossbar_InterruptHandler_25Mhz(void)
1244: {
1245: /* How many cycle was this sound interrupt delayed (>= 0) */
1246: crossbar.pendingCyclesOver25 += -INT_CONVERT_FROM_INTERNAL ( PendingInterruptCount , INT_CPU_CYCLE );
1247:
1248: /* Remove this interrupt from list and re-order */
1249: CycInt_AcknowledgeInterrupt();
1250:
1251: /* If transfer mode is in Ste mode, use only this clock for all the transfers */
1252: if (crossbar.isInSteFreqMode) {
1253: Crossbar_Process_DSPXmit_Transfer();
1254: Crossbar_Process_DMAPlay_Transfer();
1255: Crossbar_Process_ADCXmit_Transfer();
1256:
1257: /* Restart the 25 Mhz clock interrupt */
1258: Crossbar_Start_InterruptHandler_25Mhz();
1259: return;
1260: }
1261:
1262: Crossbar_Process_ADCXmit_Transfer();
1263:
1264: /* DSP Play transfer ? */
1265: if (crossbar.dspXmit_freq == CROSSBAR_FREQ_25MHZ) {
1266: Crossbar_Process_DSPXmit_Transfer();
1267: }
1268:
1269: /* DMA Play transfer ? */
1270: if (crossbar.dmaPlay_freq == CROSSBAR_FREQ_25MHZ) {
1271: Crossbar_Process_DMAPlay_Transfer();
1272: }
1273:
1274: /* Restart the 25 Mhz clock interrupt */
1275: Crossbar_Start_InterruptHandler_25Mhz();
1276: }
1277:
1278: /**
1279: * Execute transfers for internal 32 Mhz clock.
1280: */
1281: void Crossbar_InterruptHandler_32Mhz(void)
1282: {
1283: /* How many cycle was this sound interrupt delayed (>= 0) */
1284: crossbar.pendingCyclesOver32 += -INT_CONVERT_FROM_INTERNAL ( PendingInterruptCount , INT_CPU_CYCLE );
1285:
1286: /* Remove this interrupt from list and re-order */
1287: CycInt_AcknowledgeInterrupt();
1288:
1289: /* If transfer mode is in Ste mode, don't use this clock for all the transfers */
1290: if (crossbar.isInSteFreqMode) {
1291: /* Restart the 32 Mhz clock interrupt */
1292: Crossbar_Start_InterruptHandler_32Mhz();
1293: return;
1294: }
1295:
1296: /* DSP Play transfer ? */
1297: if (crossbar.dspXmit_freq == CROSSBAR_FREQ_32MHZ) {
1298: Crossbar_Process_DSPXmit_Transfer();
1299: }
1300:
1301: /* DMA Play transfer ? */
1302: if (crossbar.dmaPlay_freq == CROSSBAR_FREQ_32MHZ) {
1303: Crossbar_Process_DMAPlay_Transfer();
1304: }
1305:
1306: /* Restart the 32 Mhz clock interrupt */
1307: Crossbar_Start_InterruptHandler_32Mhz();
1308: }
1309:
1310:
1311: /*----------------------------------------------------------------------*/
1312: /*--------------------- DSP Xmit processing ----------------------------*/
1313: /*----------------------------------------------------------------------*/
1314:
1315: /**
1316: * Process DSP xmit to crossbar transfer
1317: */
1318: static void Crossbar_Process_DSPXmit_Transfer(void)
1319: {
1320: Uint16 frame=0;
1321: Sint32 data;
1.1.1.2 root 1322:
1323: /* If DSP Xmit is tristated, do nothing */
1324: if (dspXmit.isTristated)
1325: return;
1.1 root 1326:
1327: /* Is DSP Xmit connected to DMA Record in handshake mode ? */
1328: if (dmaRecord.isConnectedToDspInHandShakeMode) {
1329: Crossbar_Process_DMARecord_HandshakeMode();
1330: return;
1331: }
1332:
1333: /* Is DSP Xmit connected to something ? */
1334: if (!dspXmit.isConnectedToCodec && !dspXmit.isConnectedToDma && !dspXmit.isConnectedToDsp)
1335: return;
1336:
1337: if (dspXmit.wordCount == 0) {
1338: frame = 1;
1339: }
1340:
1341: /* Send the frame status to the DSP SSI Xmit */
1342: DSP_SsiReceive_SC2(frame);
1343:
1344: /* Send the clock to the DSP SSI Xmit */
1345: DSP_SsiReceive_SCK();
1346:
1347: /* read data from DSP Xmit */
1348: data = DSP_SsiReadTxValue();
1349:
1.1.1.4 root 1350: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : DSP --> Crossbar transfer\t0x%06x\n", data);
1351:
1.1 root 1352: /* Send DSP data to the DAC ? */
1353: if (dspXmit.isConnectedToCodec) {
1354: Crossbar_SendDataToDAC(data, dspXmit.wordCount);
1355: }
1356:
1357: /* Send DSP data to the DMA record ? */
1358: if (dspXmit.isConnectedToDma) {
1359: Crossbar_SendDataToDmaRecord(data);
1360: }
1361:
1362: /* Send DSP data to the DSP in ? */
1363: if (dspXmit.isConnectedToDsp) {
1364: Crossbar_SendDataToDspReceive(data, frame);
1365: }
1366:
1367: /* increase dspXmit.wordCount for next sample */
1368: dspXmit.wordCount++;
1369: if (dspXmit.wordCount >= (crossbar.playTracks * 2)) {
1370: dspXmit.wordCount = 0;
1371: }
1372: }
1373:
1374: /*----------------------------------------------------------------------*/
1375: /*--------------------- DSP Receive processing -------------------------*/
1376: /*----------------------------------------------------------------------*/
1377:
1378: /**
1379: * Transmit data from crossbar to DSP receive.
1380: */
1381: static void Crossbar_SendDataToDspReceive(Uint32 value, Uint16 frame)
1382: {
1383: /* Verify that DSP IN is not tristated */
1384: if (dspReceive.isTristated) {
1385: return;
1386: }
1387:
1388: /* Send sample to DSP receive */
1389: DSP_SsiWriteRxValue(value);
1390:
1391: /* Send the frame status to the DSP SSI receive */
1392: /* only in non hanshake mode */
1393: if (dmaPlay.handshakeMode_Frame == 0) {
1394: DSP_SsiReceive_SC1(frame);
1395: }
1396:
1397: dmaPlay.handshakeMode_Frame = 0;
1398:
1399: /* Send the clock to the DSP SSI receive */
1400: DSP_SsiReceive_SC0();
1401: }
1402:
1403: /*----------------------------------------------------------------------*/
1404: /*--------------------- DMA PLAY sound processing ----------------------*/
1405: /*----------------------------------------------------------------------*/
1406:
1407: /**
1408: * Set DMA Play sound start frame buffer, stop frame buffer, frame length
1409: */
1410: static void Crossbar_setDmaPlay_Settings(void)
1411: {
1412: /* DMA setings */
1413: dmaPlay.frameStartAddr = crossbar.dmaPlay_CurrentFrameStart;
1414: dmaPlay.frameEndAddr = crossbar.dmaPlay_CurrentFrameEnd;
1415: dmaPlay.frameLen = dmaPlay.frameEndAddr - dmaPlay.frameStartAddr;
1416: // dmaPlay.frameCounter = crossbar.dmaPlay_CurrentFrameCount - crossbar.dmaPlay_CurrentFrameStart;
1417: dmaPlay.frameCounter = 0;
1418:
1419: if (dmaPlay.frameEndAddr <= dmaPlay.frameStartAddr)
1420: {
1421: Log_Printf(LOG_WARN, "crossbar DMA Play: Illegal buffer size (from 0x%06x to 0x%06x)\n",
1422: dmaPlay.frameStartAddr, dmaPlay.frameEndAddr);
1423: }
1424: }
1425:
1426: /**
1427: * Process DMA Play transfer to crossbar
1428: */
1429: static void Crossbar_Process_DMAPlay_Transfer(void)
1430: {
1.1.1.2 root 1431: Uint16 temp, increment_frame;
1.1 root 1432: Sint16 value, eightBits;
1433: Sint8 *pFrameStart;
1434: Uint8 dmaCtrlReg;
1435:
1436: /* if DMA play is not running, return */
1437: if (dmaPlay.isRunning == 0)
1438: return;
1439:
1440: pFrameStart = (Sint8 *)&STRam[dmaPlay.frameStartAddr];
1.1.1.2 root 1441: increment_frame = 0;
1442:
1.1 root 1443: /* 16 bits stereo mode ? */
1444: if (crossbar.is16Bits) {
1445: eightBits = 1;
1446: value = (Sint16)do_get_mem_word(&pFrameStart[dmaPlay.frameCounter]);
1.1.1.2 root 1447: increment_frame = 2;
1.1 root 1448: }
1449: /* 8 bits stereo ? */
1450: else if (crossbar.isStereo) {
1451: eightBits = 64;
1452: value = (Sint16) pFrameStart[dmaPlay.frameCounter];
1.1.1.2 root 1453: increment_frame = 1;
1.1 root 1454: }
1455: /* 8 bits mono */
1456: else {
1457: eightBits = 64;
1458: value = (Sint16) pFrameStart[dmaPlay.frameCounter];
1459: if ((dmaPlay.currentFrame & 1) == 0) {
1.1.1.2 root 1460: increment_frame = 1;
1.1 root 1461: }
1462: }
1.1.1.2 root 1463:
1.1.1.3 root 1464: if (dmaPlay.isConnectedToDspInHandShakeMode) {
1465: /* Handshake mode */
1.1.1.2 root 1466: if (dmaPlay.handshakeMode_Frame == 0)
1467: return;
1468:
1469: dmaPlay.frameCounter += increment_frame;
1470:
1471: /* Special undocumented transfer mode :
1.1.1.3 root 1472: When DMA Play --> DSP Receive is in HandShake mode at 32 Mhz,
1.1.1.2 root 1473: datas are shifted 2 bits on the left after the transfer.
1.1.1.3 root 1474: This occurs with all demos using the Mpeg2 player from nocrew (amanita, LostBlubb, Wait, ...)
1.1.1.2 root 1475: */
1.1.1.3 root 1476: if (crossbar.dmaPlay_freq == CROSSBAR_FREQ_32MHZ) {
1477: temp = (crossbar.save_special_transfer<<2) + ((value & 0xc000)>>14);
1478: crossbar.save_special_transfer = value;
1479: value = temp;
1480: }
1.1.1.2 root 1481: }
1482: else {
1.1.1.3 root 1483: /* Non Handshake mode */
1.1.1.2 root 1484: dmaPlay.frameCounter += increment_frame;
1485: }
1486:
1.1 root 1487: /* Send sample to the DMA record ? */
1488: if (dmaPlay.isConnectedToDma) {
1489: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : DMA Play --> DMA record\n");
1490: Crossbar_SendDataToDmaRecord(value);
1491: }
1492:
1493: /* Send sample to the DAC ? */
1494: if (dmaPlay.isConnectedToCodec) {
1495: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : DMA Play --> DAC\n");
1496: Crossbar_SendDataToDAC(value * eightBits, dmaPlay.currentFrame);
1497: }
1498:
1499: /* Send sample to the DSP in ? */
1500: if (dmaPlay.isConnectedToDsp) {
1501: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : DMA Play --> DSP record\n");
1502: /* New frame ? */
1503: if (dmaPlay.currentFrame == 0) {
1504: Crossbar_SendDataToDspReceive(value, 1);
1505: }
1506: else {
1507: Crossbar_SendDataToDspReceive(value, 0);
1508: }
1509: }
1510:
1511: /* increase dmaPlay.currentFrame for next sample */
1512: dmaPlay.currentFrame ++;
1513: if (dmaPlay.currentFrame >= (crossbar.playTracks * 2)) {
1514: dmaPlay.currentFrame = 0;
1515: }
1516:
1517: /* Check if end-of-frame has been reached and raise interrupts if needed. */
1518: if (dmaPlay.frameCounter >= dmaPlay.frameLen)
1.1.1.2 root 1519: {
1.1 root 1520: /* Send a MFP15_Int (I7) at end of replay buffer if enabled */
1521: if (dmaPlay.mfp15_int) {
1.1.1.5 root 1522: MFP_InputOnChannel ( MFP_INT_GPIP7 , 0 );
1.1 root 1523: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : MFP15 (IT7) interrupt from DMA play\n");
1524: }
1525:
1526: /* Send a TimerA_Int at end of replay buffer if enabled */
1527: if (dmaPlay.timerA_int) {
1528: if (MFP_TACR == 0x08) { /* Is timer A in Event Count mode? */
1529: MFP_TimerA_EventCount_Interrupt();
1530: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : MFP Timer A interrupt from DMA play\n");
1531: }
1532: }
1533:
1534: if (dmaPlay.loopMode) {
1535: Crossbar_setDmaPlay_Settings();
1536: }
1537: else {
1.1.1.2 root 1538: /* Create samples up until this point with current values */
1539: Sound_Update(false);
1540:
1.1 root 1541: dmaCtrlReg = IoMem_ReadByte(0xff8901) & 0xfe;
1.1.1.2 root 1542: IoMem_WriteByte(0xff8901, dmaCtrlReg);
1543:
1544: /* Turning off DMA play sound emulation */
1545: dmaPlay.isRunning = 0;
1546: dmaPlay.loopMode = 0;
1547: nCbar_DmaSoundControl = dmaCtrlReg;
1.1 root 1548: }
1549: }
1550: }
1551:
1552: /**
1553: * Function called when DmaPlay is in handshake mode */
1554: void Crossbar_DmaPlayInHandShakeMode(void)
1555: {
1556: dmaPlay.handshakeMode_Frame = 1;
1557: }
1558:
1559: /*----------------------------------------------------------------------*/
1560: /*--------------------- DMA Record processing --------------------------*/
1561: /*----------------------------------------------------------------------*/
1562:
1563: /**
1564: * Set DMA Record sound start frame buffer, stop frame buffer, frame length
1565: */
1566: static void Crossbar_setDmaRecord_Settings(void)
1567: {
1568: /* DMA setings */
1569: dmaRecord.frameStartAddr = crossbar.dmaRecord_CurrentFrameStart;
1570: dmaRecord.frameEndAddr = crossbar.dmaRecord_CurrentFrameEnd;
1571: dmaRecord.frameLen = dmaRecord.frameEndAddr - dmaRecord.frameStartAddr;
1572: // dmaRecord.frameCounter = crossbar.dmaRecord_CurrentFrameCount - crossbar.dmaRecord_CurrentFrameStart;
1573: dmaRecord.frameCounter = 0;
1574:
1575: if (dmaRecord.frameEndAddr <= dmaRecord.frameStartAddr) {
1576: Log_Printf(LOG_WARN, "crossbar DMA Record: Illegal buffer size (from 0x%06x to 0x%06x)\n",
1577: dmaRecord.frameStartAddr, dmaRecord.frameEndAddr);
1578: }
1579: }
1580:
1581: /**
1582: * DMA Record processing
1583: */
1584: void Crossbar_SendDataToDmaRecord(Sint16 value)
1585: {
1586: Sint8 *pFrameStart;
1587: Uint8 dmaCtrlReg;
1588:
1589: if (dmaRecord.isRunning == 0) {
1590: return;
1591: }
1592:
1593: pFrameStart = (Sint8 *)&STRam[dmaRecord.frameStartAddr];
1594:
1595: /* 16 bits stereo mode ? */
1596: if (crossbar.is16Bits) {
1597: do_put_mem_word(&pFrameStart[dmaRecord.frameCounter], value);
1598: dmaRecord.frameCounter += 2;
1599: }
1600: /* 8 bits stereo ? */
1601: else if (crossbar.isStereo) {
1602: do_put_mem_word(&pFrameStart[dmaRecord.frameCounter], value);
1603: dmaRecord.frameCounter += 2;
1604: // pFrameStart[dmaRecord.frameCounter] = (Uint8)value;
1605: // dmaRecord.frameCounter ++;
1606: }
1607: /* 8 bits mono */
1608: else {
1609: pFrameStart[dmaRecord.frameCounter] = (Uint8)value;
1610: dmaRecord.frameCounter ++;
1611: }
1612:
1613: /* Check if end-of-frame has been reached and raise interrupts if needed. */
1614: if (dmaRecord.frameCounter >= dmaRecord.frameLen)
1615: {
1616: /* Send a MFP15_Int (I7) at end of record buffer if enabled */
1617: if (dmaRecord.mfp15_int) {
1.1.1.5 root 1618: MFP_InputOnChannel ( MFP_INT_GPIP7 , 0 );
1.1 root 1619: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : MFP15 (IT7) interrupt from DMA record\n");
1620: }
1621:
1622: /* Send a TimerA_Int at end of record buffer if enabled */
1623: if (dmaRecord.timerA_int) {
1624: if (MFP_TACR == 0x08) /* Is timer A in Event Count mode? */
1625: MFP_TimerA_EventCount_Interrupt();
1626: LOG_TRACE(TRACE_CROSSBAR, "Crossbar : MFP Timer A interrupt from DMA record\n");
1627: }
1628:
1629: if (dmaRecord.loopMode) {
1630: Crossbar_setDmaRecord_Settings();
1631: }
1632: else {
1633: dmaCtrlReg = IoMem_ReadByte(0xff8901) & 0xef;
1.1.1.2 root 1634: IoMem_WriteByte(0xff8901, dmaCtrlReg);
1635:
1636: /* Turning off DMA record sound emulation */
1637: dmaRecord.isRunning = 0;
1638: dmaRecord.loopMode = 0;
1639: nCbar_DmaSoundControl = dmaCtrlReg;
1.1 root 1640: }
1641: }
1642: }
1643:
1644:
1645: /**
1646: * Process DMA Record connected to DSP Xmit in HandShake mode.
1647: * In this special case, DMA Record is the "master" and Dsp Xmit is the "slave".
1648: */
1649: static void Crossbar_Process_DMARecord_HandshakeMode(void)
1650: {
1651: Sint16 data;
1652:
1653: /* If DMA record is activated and is running */
1654: if (dmaRecord.isRunning == 0) {
1655: return;
1656: }
1657:
1658: /* If DSP frame is activated (SC2 pin of the SSI port) */
1659: if (dmaRecord.handshakeMode_Frame == 0) {
1660: return;
1661: }
1662:
1663: /* Send the clock to the DSP SSI Xmit */
1664: DSP_SsiReceive_SCK();
1665:
1666: /* read data from DSP Xmit */
1667: data = DSP_SsiReadTxValue();
1668: dmaRecord.handshakeMode_Frame = 0;
1669:
1670: Crossbar_SendDataToDmaRecord(data);
1671: }
1672:
1673: /**
1674: * Get the frame value from DSP SSI (handshake mode only)
1675: */
1676: void Crossbar_DmaRecordInHandShakeMode_Frame(Uint32 frame)
1677: {
1678: dmaRecord.handshakeMode_Frame = frame;
1679: }
1680:
1681:
1682: /*----------------------------------------------------------------------*/
1683: /*-------------------------- ADC processing ----------------------------*/
1684: /*----------------------------------------------------------------------*/
1685:
1686: /**
1687: * Get datas recorded by the microphone and convert them into falcon internal frequency
1688: * - micro_bufferL : left track recorded by the microphone
1689: * - micro_bufferR : right track recorded by the microphone
1690: * - microBuffer_size : buffers size
1691: */
1692: void Crossbar_GetMicrophoneDatas(Sint16 *micro_bufferL, Sint16 *micro_bufferR, Uint32 microBuffer_size)
1693: {
1.1.1.4 root 1694: Uint32 i, size, bufferIndex;
1695: Sint64 idxPos;
1.1 root 1696:
1.1.1.4 root 1697: size = (microBuffer_size * crossbar.frequence_ratio>>32);
1.1 root 1698: bufferIndex = 0;
1.1.1.4 root 1699: idxPos = 0;
1700:
1.1 root 1701: for (i = 0; i < size; i++) {
1702: adc.writePosition = (adc.writePosition + 1) % DACBUFFER_SIZE;
1703:
1704: adc.buffer_left[adc.writePosition] = micro_bufferL[bufferIndex];
1705: adc.buffer_right[adc.writePosition] = micro_bufferR[bufferIndex];
1706:
1.1.1.4 root 1707: idxPos += crossbar.frequence_ratio2;
1708: bufferIndex += idxPos>>32;
1709: idxPos &= 0xffffffff; /* only keep the fractional part */
1.1 root 1710: }
1711: }
1712:
1713: /**
1714: * Process ADC transfer to crossbar
1715: */
1716: static void Crossbar_Process_ADCXmit_Transfer(void)
1717: {
1718: Sint16 sample;
1719: Uint16 frame;
1720:
1721: /* swap from left to right channel or right to left channel */
1722: adc.wordCount = 1 - adc.wordCount;
1723:
1724: /* Left Channel */
1725: if (adc.wordCount == 0) {
1726: sample = adc.buffer_left[adc.readPosition];
1727: frame = 1;
1728: }
1729: else {
1730: sample = adc.buffer_right[adc.readPosition];
1731: adc.readPosition = (adc.readPosition + 1) % DACBUFFER_SIZE;
1732: frame = 0;
1733: }
1734:
1735: /* Send sample to DSP receive ? */
1736: if (adc.isConnectedToDsp) {
1737: Crossbar_SendDataToDspReceive(sample, frame);
1738: }
1739:
1740: /* Send sample to DMA record ? */
1741: if (adc.isConnectedToDma) {
1742: Crossbar_SendDataToDmaRecord(sample);
1743: }
1744:
1745: /* Send sample to DAC ? */
1746: if (adc.isConnectedToCodec) {
1747: Crossbar_SendDataToDAC(sample, adc.wordCount);
1748: }
1749: }
1750:
1751:
1752: /*----------------------------------------------------------------------*/
1753: /*-------------------------- DAC processing ----------------------------*/
1754: /*----------------------------------------------------------------------*/
1755:
1756: /**
1757: * Put sample from crossbar into the DAC buffer.
1758: * - value : sample value to play
1759: * - sample_pos : position of the sample in the track (used to play the monitored track)
1760: */
1761: static void Crossbar_SendDataToDAC(Sint16 value, Uint16 sample_pos)
1762: {
1763: Uint16 track = crossbar.track_monitored * 2;
1764:
1765: if (sample_pos == track) {
1766: /* Left channel */
1767: dac.buffer_left[dac.writePosition] = value;
1768: }
1769: else if (sample_pos == track + 1) {
1770: /* Right channel */
1771: dac.buffer_right[dac.writePosition] = value;
1772: dac.writePosition = (dac.writePosition + 1) % (DACBUFFER_SIZE);
1773: }
1774: }
1775:
1776: /**
1777: * Mix PSG sound with microphone sound in ADC.
1778: * Also mix ADC sound sample with the crossbar DAC samples.
1779: * (Called by sound.c)
1780: */
1781: void Crossbar_GenerateSamples(int nMixBufIdx, int nSamplesToGenerate)
1782: {
1.1.1.6 ! root 1783: int i, j, nBufIdx;
! 1784: int n;
1.1 root 1785: Sint16 adc_leftData, adc_rightData, dac_LeftData, dac_RightData;
1786:
1787: if (crossbar.isDacMuted) {
1788: /* Output sound = 0 */
1789: for (i = 0; i < nSamplesToGenerate; i++) {
1790: nBufIdx = (nMixBufIdx + i) % MIXBUFFER_SIZE;
1791: MixBuffer[nBufIdx][0] = 0;
1792: MixBuffer[nBufIdx][1] = 0;
1793: }
1794:
1795: /* Counters are refreshed for when DAC becomes unmuted */
1796: dac.readPosition = dac.writePosition;
1.1.1.4 root 1797: crossbar.adc2dac_readBufferPosition = adc.writePosition;
1.1 root 1798: return;
1799: }
1800:
1801: for (i = 0; i < nSamplesToGenerate; i++)
1802: {
1803: nBufIdx = (nMixBufIdx + i) % MIXBUFFER_SIZE;
1804:
1805: /* ADC mixing (PSG sound or microphone sound for left and right channels) */
1806: switch (crossbar.codecAdcInput) {
1807: case 0:
1808: default: /* Just here to remove compiler's warnings */
1809: /* Microphone sound for left and right channels */
1.1.1.4 root 1810: adc_leftData = adc.buffer_left[crossbar.adc2dac_readBufferPosition];
1811: adc_rightData = adc.buffer_right[crossbar.adc2dac_readBufferPosition];
1.1 root 1812: break;
1813: case 1:
1814: /* Microphone sound for left channel, PSG sound for right channel */
1.1.1.4 root 1815: adc_leftData = adc.buffer_left[crossbar.adc2dac_readBufferPosition];
1.1 root 1816: adc_rightData = MixBuffer[nBufIdx][1];
1817: break;
1818: case 2:
1819: /* PSG sound for left channel, microphone sound for right channel */
1820: adc_leftData = MixBuffer[nBufIdx][0];
1.1.1.4 root 1821: adc_rightData = adc.buffer_right[crossbar.adc2dac_readBufferPosition];
1.1 root 1822: break;
1823: case 3:
1824: /* PSG sound for left and right channels */
1825: adc_leftData = MixBuffer[nBufIdx][0];
1826: adc_rightData = MixBuffer[nBufIdx][1];
1827: break;
1828: }
1829:
1830: /* DAC mixing (direct ADC + crossbar) */
1831: switch (crossbar.codecInputSource) {
1832: case 0:
1833: default: /* Just here to remove compiler's warnings */
1834: /* No sound */
1835: dac_LeftData = 0;
1836: dac_RightData = 0;
1837: break;
1838: case 1:
1839: /* direct ADC->DAC sound only ADC*4/65536 */
1840: dac_LeftData = (adc_leftData * crossbar.gainSettingLeft) >> 14;
1841: dac_RightData = (adc_rightData * crossbar.gainSettingRight) >> 14;
1842: break;
1843: case 2:
1844: /* Crossbar->DAC sound only */
1845: dac_LeftData = dac.buffer_left[dac.readPosition];
1846: dac_RightData = dac.buffer_right[dac.readPosition];
1847: break;
1848: case 3:
1849: /* Mixing Direct ADC sound with Crossbar->DMA sound */
1850: dac_LeftData = ((adc_leftData * crossbar.gainSettingLeft) >> 14) +
1851: dac.buffer_left[dac.readPosition];
1852: dac_RightData = ((adc_rightData * crossbar.gainSettingRight) >> 14) +
1853: dac.buffer_right[dac.readPosition];
1854: break;
1855: }
1856:
1857: MixBuffer[nBufIdx][0] = (dac_LeftData * crossbar.attenuationSettingLeft) >> 16;
1858: MixBuffer[nBufIdx][1] = (dac_RightData * crossbar.attenuationSettingRight) >> 16;
1859:
1860: /* Upgrade dac's buffer read pointer */
1.1.1.4 root 1861: dac.readPosition_float += crossbar.frequence_ratio;
1862: n = dac.readPosition_float >> 32; /* number of samples to skip */
1.1.1.6 ! root 1863:
! 1864: if (n) {
! 1865: // It becomes safe to zero old data if tail has moved
! 1866: for (j=0; j<n; j++) {
! 1867: dac.buffer_left[(dac.readPosition+j) % DACBUFFER_SIZE] = 0;
! 1868: dac.buffer_right[(dac.readPosition+j) % DACBUFFER_SIZE] = 0;
! 1869: }
! 1870: }
! 1871:
1.1.1.4 root 1872: dac.readPosition = (dac.readPosition + n) % DACBUFFER_SIZE;
1873: dac.readPosition_float &= 0xffffffff; /* only keep the fractional part */
1.1 root 1874:
1875: /* Upgrade adc->dac's buffer read pointer */
1.1.1.4 root 1876: crossbar.adc2dac_readBufferPosition_float += crossbar.frequence_ratio;
1877: n = crossbar.adc2dac_readBufferPosition_float >> 32; /* number of samples to skip */
1878: crossbar.adc2dac_readBufferPosition = (crossbar.adc2dac_readBufferPosition + n) % DACBUFFER_SIZE;
1879: crossbar.adc2dac_readBufferPosition_float &= 0xffffffff; /* only keep the fractional part */
1.1 root 1880: }
1881: }
1.1.1.6 ! root 1882:
! 1883:
! 1884: /**
! 1885: * display the Crossbar registers values (for debugger info command)
! 1886: */
! 1887: void Crossbar_Info(Uint32 dummy)
! 1888: {
! 1889: char matrixDMA[5], matrixDAC[5], matrixDSP[5], matrixEXT[5];
! 1890: char frqDMA[11], frqDAC[11], frqDSP[11], frqEXT[11];
! 1891: char frqSTE[30], frq25Mhz[30], frq32Mhz[30];
! 1892: char dataSize[15];
! 1893:
! 1894: static const Uint32 Ste_SampleRates[4] = {
! 1895: 6258, 12517, 25033, 50066
! 1896: };
! 1897:
! 1898: static const Uint32 Falcon_SampleRates_25Mhz[15] = {
! 1899: 49170, 32780, 24585, 19668, 16390, 14049, 12292, 10927, 9834, 8940, 8195, 7565, 7024, 6556, 6146
! 1900: };
! 1901:
! 1902: static const Uint32 Falcon_SampleRates_32Mhz[15] = {
! 1903: 62500, 41666, 31250, 25000, 20833, 17857, 15624, 13889, 12500, 11363, 10416, 9615, 8928, 8333, 7812
! 1904: };
! 1905:
! 1906: if (ConfigureParams.System.nMachineType != MACHINE_FALCON) {
! 1907: fprintf(stderr, "Not Falcon - no Crossbar!\n");
! 1908: return;
! 1909: }
! 1910:
! 1911: fprintf(stderr, "$FF8900.b : Sound DMA control : %02x\n", IoMem_ReadByte(0xff8900));
! 1912: fprintf(stderr, "$FF8901.b : Sound DMA control : %02x\n", IoMem_ReadByte(0xff8901));
! 1913: fprintf(stderr, "$FF8903.b : Frame Start High : %02x\n", IoMem_ReadByte(0xff8903));
! 1914: fprintf(stderr, "$FF8905.b : Frame Start middle : %02x\n", IoMem_ReadByte(0xff8905));
! 1915: fprintf(stderr, "$FF8907.b : Frame Start low : %02x\n", IoMem_ReadByte(0xff8907));
! 1916: fprintf(stderr, "$FF8909.b : Frame Count High : %02x\n", IoMem_ReadByte(0xff8909));
! 1917: fprintf(stderr, "$FF890B.b : Frame Count middle : %02x\n", IoMem_ReadByte(0xff890b));
! 1918: fprintf(stderr, "$FF890D.b : Frame Count low : %02x\n", IoMem_ReadByte(0xff890d));
! 1919: fprintf(stderr, "$FF890F.b : Frame End High : %02x\n", IoMem_ReadByte(0xff890f));
! 1920: fprintf(stderr, "$FF8911.b : Frame End middle : %02x\n", IoMem_ReadByte(0xff8911));
! 1921: fprintf(stderr, "$FF8913.b : Frame End low : %02x\n", IoMem_ReadByte(0xff8913));
! 1922: fprintf(stderr, "\n");
! 1923: fprintf(stderr, "$FF8920.b : Sound Mode Control : %02x\n", IoMem_ReadByte(0xff8920));
! 1924: fprintf(stderr, "$FF8921.b : Sound Mode Control : %02x\n", IoMem_ReadByte(0xff8921));
! 1925: fprintf(stderr, "$FF8930.w : DMA Crossbar Input Select Controller : %04x\n", IoMem_ReadWord(0xff8930));
! 1926: fprintf(stderr, "$FF8932.w : DMA Crossbar Output Select Controller : %04x\n", IoMem_ReadWord(0xff8932));
! 1927: fprintf(stderr, "\n");
! 1928: fprintf(stderr, "$FF8934.b : External Sync Frequency Divider : %02x\n", IoMem_ReadByte(0xff8934));
! 1929: fprintf(stderr, "$FF8935.b : Internal Sync Frequency Divider : %02x\n", IoMem_ReadByte(0xff8935));
! 1930: fprintf(stderr, "$FF8936.b : Record Track select : %02x\n", IoMem_ReadByte(0xff8936));
! 1931: fprintf(stderr, "$FF8937.b : Codec Input Source : %02x\n", IoMem_ReadByte(0xff8937));
! 1932: fprintf(stderr, "$FF8938.b : Codec ADC Input : %02x\n", IoMem_ReadByte(0xff8938));
! 1933: fprintf(stderr, "$FF8939.b : Gain Settings Per Channel : %02x\n", IoMem_ReadByte(0xff8939));
! 1934: fprintf(stderr, "$FF893A.b : Attenuation Settings Per Channel : %02x\n", IoMem_ReadByte(0xff893a));
! 1935: fprintf(stderr, "$FF893C.w : Codec Status : %04x\n", IoMem_ReadWord(0xff893c));
! 1936: fprintf(stderr, "$FF8940.w : GPIO Data Direction : %04x\n", IoMem_ReadWord(0xff8940));
! 1937: fprintf(stderr, "$FF8942.w : GPIO Data : %04x\n", IoMem_ReadWord(0xff8942));
! 1938: fprintf(stderr, "\n");
! 1939:
! 1940: /* DAC connexion */
! 1941: switch ((IoMem_ReadWord(0xff8932) >> 13) & 0x3) {
! 1942: case 0 :
! 1943: /* DAC connexion with DMA Playback */
! 1944: if ((IoMem_ReadWord(0xff8930) & 0x1) == 1)
! 1945: strcpy(matrixDAC, "OOXO");
! 1946: else
! 1947: strcpy(matrixDAC, "OOHO");
! 1948: break;
! 1949: case 1 :
! 1950: /* DAC connexion with DSP Transmit */
! 1951: if ((IoMem_ReadWord(0xff8930) & 0x10) == 0x10)
! 1952: strcpy(matrixDAC, "OXOO");
! 1953: else
! 1954: strcpy(matrixDAC, "OHOO");
! 1955: break;
! 1956: case 2 :
! 1957: /* DAC connexion with External Input */
! 1958: if ((IoMem_ReadWord(0xff8930) & 0x100) == 0x100)
! 1959: strcpy(matrixDAC, "XOOO");
! 1960: else
! 1961: strcpy(matrixDAC, "HOOO");
! 1962: break;
! 1963: case 3 :
! 1964: /* DAC connexion with ADC */
! 1965: strcpy(matrixDAC, "OOOX");
! 1966: break;
! 1967: }
! 1968:
! 1969: /* DMA connexion */
! 1970: switch (IoMem_ReadWord(0xff8932) & 0x7) {
! 1971: case 0 : strcpy(matrixDMA, "OOHO"); break;
! 1972: case 1 : strcpy(matrixDMA, "OOXO"); break;
! 1973: case 2 : strcpy(matrixDMA, "OHOO"); break;
! 1974: case 3 : strcpy(matrixDMA, "OXOO"); break;
! 1975: case 4 : strcpy(matrixDMA, "HOOO"); break;
! 1976: case 5 : strcpy(matrixDMA, "XOOO"); break;
! 1977: case 6 : strcpy(matrixDMA, "OOOH"); break;
! 1978: case 7 : strcpy(matrixDMA, "OOOX"); break;
! 1979: }
! 1980:
! 1981: /* DSP connexion */
! 1982: switch ((IoMem_ReadWord(0xff8932) >> 4) & 0x7) {
! 1983: case 0 : strcpy(matrixDSP, "OOHO"); break;
! 1984: case 1 : strcpy(matrixDSP, "OOXO"); break;
! 1985: case 2 : strcpy(matrixDSP, "OHOO"); break;
! 1986: case 3 : strcpy(matrixDSP, "OXOO"); break;
! 1987: case 4 : strcpy(matrixDSP, "HOOO"); break;
! 1988: case 5 : strcpy(matrixDSP, "XOOO"); break;
! 1989: case 6 : strcpy(matrixDSP, "OOOH"); break;
! 1990: case 7 : strcpy(matrixDSP, "OOOX"); break;
! 1991: }
! 1992:
! 1993: /* External input connexion */
! 1994: switch ((IoMem_ReadWord(0xff8932) >> 8) & 0x7) {
! 1995: case 0 : strcpy(matrixEXT, "OOHO"); break;
! 1996: case 1 : strcpy(matrixEXT, "OOXO"); break;
! 1997: case 2 : strcpy(matrixEXT, "OHOO"); break;
! 1998: case 3 : strcpy(matrixEXT, "OXOO"); break;
! 1999: case 4 : strcpy(matrixEXT, "HOOO"); break;
! 2000: case 5 : strcpy(matrixEXT, "XOOO"); break;
! 2001: case 6 : strcpy(matrixEXT, "OOOH"); break;
! 2002: case 7 : strcpy(matrixEXT, "OOOX"); break;
! 2003: }
! 2004:
! 2005: if ((IoMem_ReadByte(0xff8935) & 0xf) == 0) {
! 2006: strcpy(frqDSP, "(STe Freq)");
! 2007: strcpy(frqDMA, "(STe Freq)");
! 2008: strcpy(frqEXT, "(STe Freq)");
! 2009: strcpy(frqDAC, "(STe Freq)");
! 2010: }
! 2011: else {
! 2012: /* DSP Clock */
! 2013: switch ((IoMem_ReadWord(0xff8930) >> 5) & 0x3) {
! 2014: case 0: strcpy(frqDSP, " (25 Mhz) "); break;
! 2015: case 1: strcpy(frqDSP, "(External)"); break;
! 2016: case 2: strcpy(frqDSP, " (32 Mhz) "); break;
! 2017: default: strcpy(frqDSP, "undefined "); break;
! 2018: }
! 2019:
! 2020: /* DMA Clock */
! 2021: switch ((IoMem_ReadWord(0xff8930) >> 1) & 0x3) {
! 2022: case 0: strcpy(frqDMA, " (25 Mhz) "); break;
! 2023: case 1: strcpy(frqDMA, "(External)"); break;
! 2024: case 2: strcpy(frqDMA, " (32 Mhz) "); break;
! 2025: default: strcpy(frqDMA, "undefined "); break;
! 2026: }
! 2027:
! 2028: /* External Clock */
! 2029: switch ((IoMem_ReadWord(0xff8930) >> 9) & 0x3) {
! 2030: case 0: strcpy(frqEXT, " (25 Mhz) "); break;
! 2031: case 1: strcpy(frqEXT, "(External)"); break;
! 2032: case 2: strcpy(frqEXT, " (32 Mhz) "); break;
! 2033: default: strcpy(frqEXT, "undefined "); break;
! 2034: }
! 2035:
! 2036: /* DAC Clock */
! 2037: strcpy(frqDAC, " (25 Mhz) ");
! 2038: }
! 2039:
! 2040: /* data size */
! 2041: switch ((IoMem_ReadByte(0xff8921) >> 6) & 0x3) {
! 2042: case 0: strcpy (dataSize, "8 bits stereo"); break;
! 2043: case 1: strcpy (dataSize, "16 bits stereo"); break;
! 2044: case 2: strcpy (dataSize, "8 bits mono"); break;
! 2045: default: strcpy (dataSize, "undefined"); break;
! 2046: }
! 2047:
! 2048: /* STE, 25Mhz and 32 Mhz sound frequencies */
! 2049: if ((IoMem_ReadByte(0xff8935) & 0xf) == 0) {
! 2050: sprintf(frqSTE, "Ste Freq : %d Khz", Ste_SampleRates[IoMem_ReadByte(0xff8921) & 0x3]);
! 2051: strcpy (frq25Mhz, "25 Mhz Freq : - Khz");
! 2052: strcpy (frq32Mhz, "32 Mzh Freq : - Khz");
! 2053: }
! 2054: else {
! 2055: strcpy (frqSTE, "Ste Freq : - Khz");
! 2056: sprintf(frq25Mhz, "25 Mhz Freq : %d Khz", Falcon_SampleRates_25Mhz[(IoMem_ReadByte(0xff8935) & 0xf) - 1]);
! 2057: sprintf(frq32Mhz, "32 Mzh Freq : %d Khz", Falcon_SampleRates_32Mhz[(IoMem_ReadByte(0xff8935) & 0xf) - 1]);
! 2058: }
! 2059:
! 2060: /* Display the crossbar Matrix */
! 2061: fprintf(stderr, " INPUT\n");
! 2062: fprintf(stderr, "External Imp ---%c------%c------%c------%c\n", matrixDAC[0], matrixDMA[0], matrixDSP[0], matrixEXT[0]);
! 2063: fprintf(stderr, "%s | | | | O = no connexion\n", frqEXT);
! 2064: fprintf(stderr, " | | | | X = connexion\n");
! 2065: fprintf(stderr, "Dsp Transmit ---%c------%c------%c------%c H = Handshake connexion\n", matrixDAC[1], matrixDMA[1], matrixDSP[1], matrixEXT[1]);
! 2066: fprintf(stderr, "%s | | | |\n", frqDSP);
! 2067: fprintf(stderr, " | | | | %s\n", dataSize);
! 2068: fprintf(stderr, "DMA PlayBack ---%c------%c------%c------%c\n", matrixDAC[2], matrixDMA[2], matrixDSP[2], matrixEXT[2]);
! 2069: fprintf(stderr, "%s | | | | Sound Freq :\n", frqDMA);
! 2070: fprintf(stderr, " | | | | %s\n", frqSTE);
! 2071: fprintf(stderr, "ADC ---%c------%c------%c------%c %s\n", matrixDAC[3], matrixDMA[3], matrixDSP[3], matrixEXT[3], frq25Mhz);
! 2072: fprintf(stderr, "%s | | | | %s\n", frqDAC, frq32Mhz);
! 2073: fprintf(stderr, " | | | |\n");
! 2074: fprintf(stderr, " DAC DMA DSP External OUTPUT\n");
! 2075: fprintf(stderr, " Record Record Out\n");
! 2076: fprintf(stderr, "\n");
! 2077: }
! 2078:
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