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=spuMem[spuAddr>>1];
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32 if(spuAddr>0x7ffff) 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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45 for(i=0;i<iSize;i++)
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47 *pusPSXMem++=spuMem[spuAddr>>1]; // spu addr got by writeregister
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48 spuAddr+=2; // inc spu addr
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49 if(spuAddr>0x7ffff) spuAddr=0; // wrap
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53 ////////////////////////////////////////////////////////////////////////
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54 ////////////////////////////////////////////////////////////////////////
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55 ////////////////////////////////////////////////////////////////////////
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57 // to investigate: do sound data updates by writedma affect spu
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58 // irqs? Will an irq be triggered, if new data is written to
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59 // the memory irq address?
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61 ////////////////////////////////////////////////////////////////////////
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62 // WRITE DMA (one value)
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63 ////////////////////////////////////////////////////////////////////////
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65 void CALLBACK SPUwriteDMA(unsigned short val)
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67 spuMem[spuAddr>>1] = val; // spu addr got by writeregister
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69 spuAddr+=2; // inc spu addr
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70 if(spuAddr>0x7ffff) spuAddr=0; // wrap
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73 ////////////////////////////////////////////////////////////////////////
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74 // WRITE DMA (many values)
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75 ////////////////////////////////////////////////////////////////////////
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77 void CALLBACK SPUwriteDMAMem(unsigned short * pusPSXMem,int iSize)
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83 if(spuAddr + iSize*2 < 0x80000)
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85 memcpy(&spuMem[spuAddr>>1], pusPSXMem, iSize*2);
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90 for(i=0;i<iSize;i++)
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92 spuMem[spuAddr>>1] = *pusPSXMem++; // spu addr got by writeregister
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93 spuAddr+=2; // inc spu addr
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94 spuAddr&=0x7ffff; // wrap
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98 ////////////////////////////////////////////////////////////////////////
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