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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23 #include "registers.h"
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25 static void set_dma_end(int iSize, unsigned int cycles)
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27 // this must be > psxdma.c dma irq
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28 // Road Rash also wants a considerable delay, maybe because of fifo?
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29 cycles += iSize * 20; // maybe
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30 cycles |= 1; // indicates dma is active
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31 spu.cycles_dma_end = cycles;
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34 ////////////////////////////////////////////////////////////////////////
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35 // READ DMA (many values)
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36 ////////////////////////////////////////////////////////////////////////
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38 void CALLBACK SPUreadDMAMem(unsigned short *pusPSXMem, int iSize,
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39 unsigned int cycles)
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41 unsigned int addr = spu.spuAddr, irq_addr = regAreaGet(H_SPUirqAddr) << 3;
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44 do_samples_if_needed(cycles, 1, 2);
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45 irq_after = (irq_addr - addr) & 0x7ffff;
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47 for(i = 0; i < iSize; i++)
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49 *pusPSXMem++ = *(unsigned short *)(spu.spuMemC + addr);
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53 if ((spu.spuCtrl & CTRL_IRQ) && irq_after < iSize * 2) {
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54 log_unhandled("rdma spu irq: %x/%x-%x\n", irq_addr, spu.spuAddr, addr);
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55 do_irq_io(irq_after);
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58 set_dma_end(iSize, cycles);
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61 ////////////////////////////////////////////////////////////////////////
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62 // WRITE DMA (many values)
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63 ////////////////////////////////////////////////////////////////////////
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65 void CALLBACK SPUwriteDMAMem(unsigned short *pusPSXMem, int iSize,
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66 unsigned int cycles)
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68 unsigned int addr = spu.spuAddr, irq_addr = regAreaGet(H_SPUirqAddr) << 3;
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71 do_samples_if_needed(cycles + iSize*2 * 4, 1, 2);
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72 irq_after = (irq_addr - addr) & 0x7ffff;
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75 if (addr + iSize*2 < 0x80000)
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77 memcpy(spu.spuMemC + addr, pusPSXMem, iSize*2);
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82 for (i = 0; i < iSize; i++)
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84 *(unsigned short *)(spu.spuMemC + addr) = *pusPSXMem++;
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89 if ((spu.spuCtrl & CTRL_IRQ) && irq_after < iSize * 2) {
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90 log_unhandled("%u wdma spu irq: %x/%x-%x (%u)\n",
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91 cycles, irq_addr, spu.spuAddr, addr, irq_after);
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92 // this should be consistent with psxdma.c timing
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93 // might also need more delay like in set_dma_end()
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94 do_irq_io(irq_after * 4);
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96 for (i = 0; i < MAXCHAN; i++) {
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97 size_t ediff, p = spu.s_chan[i].pCurr - spu.spuMemC;
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98 if (spu.s_chan[i].ADSRX.State == ADSR_RELEASE && !spu.s_chan[i].ADSRX.EnvelopeVol)
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101 if (spu.spuAddr < p && p < spu.spuAddr + iSize * 2) {
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102 log_unhandled("%u spu ch%02d play %zx dma %x-%x (%zd)\n",
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103 cycles, i, p, spu.spuAddr, addr, ediff);
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106 // a hack for the super annoying timing issues in The Emperor's New Groove
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107 // (which is a game bug, but tends to trigger more here)
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108 if (ediff <= 0x20u) {
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109 spu.s_chan[i].pCurr += ediff;
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113 spu.spuAddr = addr;
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114 set_dma_end(iSize, cycles);
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117 ////////////////////////////////////////////////////////////////////////
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118 // vim:shiftwidth=1:expandtab
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