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 = addr <= irq_addr && irq_addr < addr + iSize*2;
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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 (irq && (spu.spuCtrl & CTRL_IRQ))
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54 log_unhandled("rdma spu irq: %x/%x+%x\n", irq_addr, spu.spuAddr, iSize * 2);
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56 set_dma_end(iSize, cycles);
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59 ////////////////////////////////////////////////////////////////////////
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60 // WRITE DMA (many values)
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61 ////////////////////////////////////////////////////////////////////////
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63 void CALLBACK SPUwriteDMAMem(unsigned short *pusPSXMem, int iSize,
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64 unsigned int cycles)
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66 unsigned int addr = spu.spuAddr, irq_addr = regAreaGet(H_SPUirqAddr) << 3;
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69 do_samples_if_needed(cycles, 1, 2);
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71 irq = addr <= irq_addr && irq_addr < addr + iSize*2;
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73 if (addr + iSize*2 < 0x80000)
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75 memcpy(spu.spuMemC + addr, pusPSXMem, iSize*2);
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80 irq |= irq_addr < ((addr + iSize*2) & 0x7ffff);
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81 for (i = 0; i < iSize; i++)
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83 *(unsigned short *)(spu.spuMemC + addr) = *pusPSXMem++;
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88 if (irq && (spu.spuCtrl & CTRL_IRQ)) // unhandled because need to implement delay
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89 log_unhandled("wdma spu irq: %x/%x+%x\n", irq_addr, spu.spuAddr, iSize * 2);
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91 set_dma_end(iSize, cycles);
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94 ////////////////////////////////////////////////////////////////////////
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