1 /***************************************************************************
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4 begin : Wed May 15 2002
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5 copyright : (C) 2002 by Pete Bernert
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6 email : BlackDove@addcom.de
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7 ***************************************************************************/
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8 /***************************************************************************
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10 * This program is free software; you can redistribute it and/or modify *
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11 * it under the terms of the GNU General Public License as published by *
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12 * the Free Software Foundation; either version 2 of the License, or *
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13 * (at your option) any later version. See also the license.txt file for *
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14 * additional informations. *
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16 ***************************************************************************/
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22 #include "externals.h"
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24 ////////////////////////////////////////////////////////////////////////
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25 // READ DMA (one value)
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26 ////////////////////////////////////////////////////////////////////////
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28 unsigned short CALLBACK SPUreadDMA(void)
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30 unsigned short s=spu.spuMem[spu.spuAddr>>1];
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32 if(spu.spuAddr>0x7ffff) spu.spuAddr=0;
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37 ////////////////////////////////////////////////////////////////////////
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38 // READ DMA (many values)
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39 ////////////////////////////////////////////////////////////////////////
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41 void CALLBACK SPUreadDMAMem(unsigned short *pusPSXMem, int iSize,
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42 unsigned int cycles)
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46 do_samples_if_needed(cycles, 1);
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48 for(i=0;i<iSize;i++)
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50 *pusPSXMem++=spu.spuMem[spu.spuAddr>>1]; // spu addr got by writeregister
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51 spu.spuAddr+=2; // inc spu addr
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52 if(spu.spuAddr>0x7ffff) spu.spuAddr=0; // wrap
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56 ////////////////////////////////////////////////////////////////////////
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57 ////////////////////////////////////////////////////////////////////////
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58 ////////////////////////////////////////////////////////////////////////
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60 // to investigate: do sound data updates by writedma affect spu
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61 // irqs? Will an irq be triggered, if new data is written to
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62 // the memory irq address?
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64 ////////////////////////////////////////////////////////////////////////
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65 // WRITE DMA (one value)
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66 ////////////////////////////////////////////////////////////////////////
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68 void CALLBACK SPUwriteDMA(unsigned short val)
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70 spu.spuMem[spu.spuAddr>>1] = val; // spu addr got by writeregister
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72 spu.spuAddr+=2; // inc spu addr
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73 if(spu.spuAddr>0x7ffff) spu.spuAddr=0; // wrap
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76 ////////////////////////////////////////////////////////////////////////
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77 // WRITE DMA (many values)
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78 ////////////////////////////////////////////////////////////////////////
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80 void CALLBACK SPUwriteDMAMem(unsigned short *pusPSXMem, int iSize,
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81 unsigned int cycles)
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85 do_samples_if_needed(cycles, 1);
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87 if(spu.spuAddr + iSize*2 < 0x80000)
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89 memcpy(&spu.spuMem[spu.spuAddr>>1], pusPSXMem, iSize*2);
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90 spu.spuAddr += iSize*2;
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94 for(i=0;i<iSize;i++)
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96 spu.spuMem[spu.spuAddr>>1] = *pusPSXMem++; // spu addr got by writeregister
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97 spu.spuAddr+=2; // inc spu addr
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98 spu.spuAddr&=0x7ffff; // wrap
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102 ////////////////////////////////////////////////////////////////////////
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