diff options
Diffstat (limited to 'src/dma.cpp')
| -rw-r--r-- | src/dma.cpp | 873 |
1 files changed, 0 insertions, 873 deletions
diff --git a/src/dma.cpp b/src/dma.cpp deleted file mode 100644 index 61c4d4e..0000000 --- a/src/dma.cpp +++ /dev/null @@ -1,873 +0,0 @@ -/*
- * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
- *
- * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
- * Jerremy Koot (jkoot@snes9x.com)
- *
- * Super FX C emulator code
- * (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
- * Gary Henderson.
- * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
- *
- * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
- * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
- * C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
- *
- * DOS port code contains the works of other authors. See headers in
- * individual files.
- *
- * Snes9x homepage: http://www.snes9x.com
- *
- * Permission to use, copy, modify and distribute Snes9x in both binary and
- * source form, for non-commercial purposes, is hereby granted without fee,
- * providing that this license information and copyright notice appear with
- * all copies and any derived work.
- *
- * This software is provided 'as-is', without any express or implied
- * warranty. In no event shall the authors be held liable for any damages
- * arising from the use of this software.
- *
- * Snes9x is freeware for PERSONAL USE only. Commercial users should
- * seek permission of the copyright holders first. Commercial use includes
- * charging money for Snes9x or software derived from Snes9x.
- *
- * The copyright holders request that bug fixes and improvements to the code
- * should be forwarded to them so everyone can benefit from the modifications
- * in future versions.
- *
- * Super NES and Super Nintendo Entertainment System are trademarks of
- * Nintendo Co., Limited and its subsidiary companies.
- */
-#include "snes9x.h"
-
-#include "memmap.h"
-#include "ppu.h"
-#include "cpuexec.h"
-#include "missing.h"
-#include "dma.h"
-#include "apu.h"
-#include "gfx.h"
-#ifdef USE_SA1
-#include "sa1.h"
-#endif
-
-//SDD1
-#include "sdd1emu.h"
-uint8 buffer[0x10000];
-//SDD1//
-
-extern int HDMA_ModeByteCounts [8];
-extern uint8 *HDMAMemPointers [8];
-extern uint8 *HDMABasePointers [8];
-
-static int S9xCompareSDD1IndexEntries (const void *p1, const void *p2)
-{
- return (*(uint32 *) p1 - *(uint32 *) p2);
-}
-
-/**********************************************************************************************/
-/* S9xDoDMA() */
-/* This function preforms the general dma transfer */
-/**********************************************************************************************/
-void S9xDoDMA (uint8 Channel)
-{
- uint8 Work;
-
- if (Channel > 7 || CPU.InDMA)
- return;
-
- CPU.InDMA = TRUE;
- bool8 in_sa1_dma = FALSE;
- uint8 *in_sdd1_dma = NULL;
- SDMA *d = &DMA[Channel];
-
- int count = d->TransferBytes;
-
- if (count == 0)
- count = 0x10000;
-
- int inc = d->AAddressFixed ? 0 : (!d->AAddressDecrement ? 1 : -1);
-
- if((d->ABank==0x7E||d->ABank==0x7F)&&d->BAddress==0x80)
- {
- d->AAddress+= d->TransferBytes;
- goto update_address;
- }
- switch (d->BAddress)
- {
- case 0x18:
- case 0x19:
- if (IPPU.RenderThisFrame)
-#ifdef __DEBUG__
- printf("FLUSH_REDRAW by DMA BAddress %x", d->BAddress);
-#endif
- FLUSH_REDRAW ();
-
- break;
- }
-
- if (Settings.SDD1)
- {
- if (d->AAddressFixed && Memory.FillRAM [0x4801] > 0)
- {
- // Hacky support for pre-decompressed S-DD1 data
- inc = !d->AAddressDecrement ? 1 : -1;
- uint32 address = (((d->ABank << 16) | d->AAddress) & 0xfffff) << 4;
-
- address |= Memory.FillRAM [0x4804 + ((d->ABank - 0xc0) >> 4)];
- if(Settings.SDD1Pack)
- {
- uint8* in_ptr=GetBasePointer(((d->ABank << 16) | d->AAddress));
- in_ptr+=d->AAddress;
-
- SDD1_decompress(buffer,in_ptr,d->TransferBytes);
- in_sdd1_dma=buffer;
- }
- else
- {
- #if 1
- void *ptr = bsearch (&address, Memory.SDD1Index,
- Memory.SDD1Entries, 12, S9xCompareSDD1IndexEntries);
- if (ptr)
- in_sdd1_dma = *(uint32 *) ((uint8 *) ptr + 4) + Memory.SDD1Data;
- #else
- uint8 *ptr = Memory.SDD1Index;
-
- for (uint32 e = 0; e < Memory.SDD1Entries; e++, ptr += 12)
- {
- if (address == *(uint32 *) ptr)
- {
- in_sdd1_dma = *(uint32 *) (ptr + 4) + Memory.SDD1Data;
- break;
- }
- }
- #endif
-
-/* if (!in_sdd1_dma)
- {
- // No matching decompressed data found. Must be some new
- // graphics not encountered before. Log it if it hasn't been
- // already.
- uint8 *p = Memory.SDD1LoggedData;
- bool8 found = FALSE;
- uint8 SDD1Bank = Memory.FillRAM [0x4804 + ((d->ABank - 0xc0) >> 4)] | 0xf0;
-
- for (uint32 i = 0; i < Memory.SDD1LoggedDataCount; i++, p += 8)
- {
- if (*p == d->ABank ||
- *(p + 1) == (d->AAddress >> 8) &&
- *(p + 2) == (d->AAddress & 0xff) &&
- *(p + 3) == (count >> 8) &&
- *(p + 4) == (count & 0xff) &&
- *(p + 7) == SDD1Bank)
- {
- found = TRUE;
- break;
- }
- }
- if (!found && Memory.SDD1LoggedDataCount < MEMMAP_MAX_SDD1_LOGGED_ENTRIES)
- {
- *p = d->ABank;
- *(p + 1) = d->AAddress >> 8;
- *(p + 2) = d->AAddress & 0xff;
- *(p + 3) = count >> 8;
- *(p + 4) = count & 0xff;
- *(p + 7) = SDD1Bank;
- Memory.SDD1LoggedDataCount += 1;
- }
- }
-*/ }
- }
-
- Memory.FillRAM [0x4801] = 0;
- }
-
-#ifdef USE_SA1
- if (d->BAddress == 0x18 && SA1.in_char_dma && (d->ABank & 0xf0) == 0x40)
-#else
- if (d->BAddress == 0x18 && (d->ABank & 0xf0) == 0x40)
-#endif
- {
- // Perform packed bitmap to PPU character format conversion on the
- // data before transmitting it to V-RAM via-DMA.
- int num_chars = 1 << ((Memory.FillRAM [0x2231] >> 2) & 7);
- int depth = (Memory.FillRAM [0x2231] & 3) == 0 ? 8 :
- (Memory.FillRAM [0x2231] & 3) == 1 ? 4 : 2;
-
- int bytes_per_char = 8 * depth;
- int bytes_per_line = depth * num_chars;
- int char_line_bytes = bytes_per_char * num_chars;
- uint32 addr = (d->AAddress / char_line_bytes) * char_line_bytes;
- uint8 *base = GetBasePointer ((d->ABank << 16) + addr) + addr;
- uint8 *buffer = &Memory.ROM [CMemory::MAX_ROM_SIZE - 0x10000];
- uint8 *p = buffer;
- uint32 inc = char_line_bytes - (d->AAddress % char_line_bytes);
- uint32 char_count = inc / bytes_per_char;
-
- in_sa1_dma = TRUE;
-
-//printf ("%08x,", base); fflush (stdout);
-//printf ("depth = %d, count = %d, bytes_per_char = %d, bytes_per_line = %d, num_chars = %d, char_line_bytes = %d\n",
-//depth, count, bytes_per_char, bytes_per_line, num_chars, char_line_bytes);
- int i;
-
- switch (depth)
- {
- case 2:
- for (i = 0; i < count; i += inc, base += char_line_bytes,
- inc = char_line_bytes, char_count = num_chars)
- {
- uint8 *line = base + (num_chars - char_count) * 2;
- for (uint32 j = 0; j < char_count && p - buffer < count;
- j++, line += 2)
- {
- uint8 *q = line;
- for (int l = 0; l < 8; l++, q += bytes_per_line)
- {
- for (int b = 0; b < 2; b++)
- {
- uint8 r = *(q + b);
- *(p + 0) = (*(p + 0) << 1) | ((r >> 0) & 1);
- *(p + 1) = (*(p + 1) << 1) | ((r >> 1) & 1);
- *(p + 0) = (*(p + 0) << 1) | ((r >> 2) & 1);
- *(p + 1) = (*(p + 1) << 1) | ((r >> 3) & 1);
- *(p + 0) = (*(p + 0) << 1) | ((r >> 4) & 1);
- *(p + 1) = (*(p + 1) << 1) | ((r >> 5) & 1);
- *(p + 0) = (*(p + 0) << 1) | ((r >> 6) & 1);
- *(p + 1) = (*(p + 1) << 1) | ((r >> 7) & 1);
- }
- p += 2;
- }
- }
- }
- break;
- case 4:
- for (i = 0; i < count; i += inc, base += char_line_bytes,
- inc = char_line_bytes, char_count = num_chars)
- {
- uint8 *line = base + (num_chars - char_count) * 4;
- for (uint32 j = 0; j < char_count && p - buffer < count;
- j++, line += 4)
- {
- uint8 *q = line;
- for (int l = 0; l < 8; l++, q += bytes_per_line)
- {
- for (int b = 0; b < 4; b++)
- {
- uint8 r = *(q + b);
- *(p + 0) = (*(p + 0) << 1) | ((r >> 0) & 1);
- *(p + 1) = (*(p + 1) << 1) | ((r >> 1) & 1);
- *(p + 16) = (*(p + 16) << 1) | ((r >> 2) & 1);
- *(p + 17) = (*(p + 17) << 1) | ((r >> 3) & 1);
- *(p + 0) = (*(p + 0) << 1) | ((r >> 4) & 1);
- *(p + 1) = (*(p + 1) << 1) | ((r >> 5) & 1);
- *(p + 16) = (*(p + 16) << 1) | ((r >> 6) & 1);
- *(p + 17) = (*(p + 17) << 1) | ((r >> 7) & 1);
- }
- p += 2;
- }
- p += 32 - 16;
- }
- }
- break;
- case 8:
- for (i = 0; i < count; i += inc, base += char_line_bytes,
- inc = char_line_bytes, char_count = num_chars)
- {
- uint8 *line = base + (num_chars - char_count) * 8;
- for (uint32 j = 0; j < char_count && p - buffer < count;
- j++, line += 8)
- {
- uint8 *q = line;
- for (int l = 0; l < 8; l++, q += bytes_per_line)
- {
- for (int b = 0; b < 8; b++)
- {
- uint8 r = *(q + b);
- *(p + 0) = (*(p + 0) << 1) | ((r >> 0) & 1);
- *(p + 1) = (*(p + 1) << 1) | ((r >> 1) & 1);
- *(p + 16) = (*(p + 16) << 1) | ((r >> 2) & 1);
- *(p + 17) = (*(p + 17) << 1) | ((r >> 3) & 1);
- *(p + 32) = (*(p + 32) << 1) | ((r >> 4) & 1);
- *(p + 33) = (*(p + 33) << 1) | ((r >> 5) & 1);
- *(p + 48) = (*(p + 48) << 1) | ((r >> 6) & 1);
- *(p + 49) = (*(p + 49) << 1) | ((r >> 7) & 1);
- }
- p += 2;
- }
- p += 64 - 16;
- }
- }
- break;
- }
-
- }
-
- if (!d->TransferDirection)
- {
-#ifdef VAR_CYCLES
- //reflects extra cycle used by DMA
- CPU.Cycles += 8 * (count+1);
-#else
- //needs fixing for the extra DMA cycle
- CPU.Cycles += (1+count) + ((1+count) >> 2);
-#endif
- uint8 *base = GetBasePointer ((d->ABank << 16) + d->AAddress);
- uint16 p = d->AAddress;
-
- if (!base)
- base = Memory.ROM;
-
- if (in_sa1_dma)
- {
- base = &Memory.ROM [CMemory::MAX_ROM_SIZE - 0x10000];
- p = 0;
- }
-
- if (in_sdd1_dma)
- {
- base = in_sdd1_dma;
- p = 0;
- }
-
- if (inc > 0)
- d->AAddress += count;
- else
- if (inc < 0)
- d->AAddress -= count;
-
- if (d->TransferMode == 0 || d->TransferMode == 2)
- {
- switch (d->BAddress)
- {
- case 0x04:
- do
- {
- Work = *(base + p);
- REGISTER_2104(Work);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- break;
- case 0x18:
- IPPU.FirstVRAMRead = TRUE;
- if (!PPU.VMA.FullGraphicCount)
- {
- do
- {
- Work = *(base + p);
- REGISTER_2118_linear(Work);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- }
- else
- {
- do
- {
- Work = *(base + p);
- REGISTER_2118_tile(Work);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- }
- break;
- case 0x19:
- IPPU.FirstVRAMRead = TRUE;
- if (!PPU.VMA.FullGraphicCount)
- {
- do
- {
- Work = *(base + p);
- REGISTER_2119_linear(Work);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- }
- else
- {
- do
- {
- Work = *(base + p);
- REGISTER_2119_tile(Work);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- }
- break;
- case 0x22:
- do
- {
- Work = *(base + p);
- REGISTER_2122(Work);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- break;
- case 0x80:
- do
- {
- Work = *(base + p);
- REGISTER_2180(Work);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- break;
- default:
- do
- {
- Work = *(base + p);
- S9xSetPPU (Work, 0x2100 + d->BAddress);
- p += inc;
- CHECK_SOUND();
- } while (--count > 0);
- break;
- }
- }
- else
- if (d->TransferMode == 1 || d->TransferMode == 5)
- {
- if (d->BAddress == 0x18)
- {
- // Write to V-RAM
- IPPU.FirstVRAMRead = TRUE;
- if (!PPU.VMA.FullGraphicCount)
- {
- while (count > 1)
- {
- Work = *(base + p);
- REGISTER_2118_linear(Work);
- p += inc;
-
- Work = *(base + p);
- REGISTER_2119_linear(Work);
- p += inc;
- CHECK_SOUND();
- count -= 2;
- }
- if (count == 1)
- {
- Work = *(base + p);
- REGISTER_2118_linear(Work);
- p += inc;
- }
- }
- else
- {
- while (count > 1)
- {
- Work = *(base + p);
- REGISTER_2118_tile(Work);
- p += inc;
-
- Work = *(base + p);
- REGISTER_2119_tile(Work);
- p += inc;
- CHECK_SOUND();
- count -= 2;
- }
- if (count == 1)
- {
- Work = *(base + p);
- REGISTER_2118_tile(Work);
- p += inc;
- }
- }
- }
- else
- {
- // DMA mode 1 general case
- while (count > 1)
- {
- Work = *(base + p);
- S9xSetPPU (Work, 0x2100 + d->BAddress);
- p += inc;
-
- Work = *(base + p);
- S9xSetPPU (Work, 0x2101 + d->BAddress);
- p += inc;
- CHECK_SOUND();
- count -= 2;
- }
- if (count == 1)
- {
- Work = *(base + p);
- S9xSetPPU (Work, 0x2100 + d->BAddress);
- p += inc;
- }
- }
- }
- else
- if (d->TransferMode == 3)
- {
- do
- {
- Work = *(base + p);
- S9xSetPPU (Work, 0x2100 + d->BAddress);
- p += inc;
- if (count <= 1)
- break;
-
- Work = *(base + p);
- S9xSetPPU (Work, 0x2100 + d->BAddress);
- p += inc;
- if (count <= 2)
- break;
-
- Work = *(base + p);
- S9xSetPPU (Work, 0x2101 + d->BAddress);
- p += inc;
- if (count <= 3)
- break;
-
- Work = *(base + p);
- S9xSetPPU (Work, 0x2101 + d->BAddress);
- p += inc;
- CHECK_SOUND();
- count -= 4;
- } while (count > 0);
- }
- else
- if (d->TransferMode == 4)
- {
- do
- {
- Work = *(base + p);
- S9xSetPPU (Work, 0x2100 + d->BAddress);
- p += inc;
- if (count <= 1)
- break;
-
- Work = *(base + p);
- S9xSetPPU (Work, 0x2101 + d->BAddress);
- p += inc;
- if (count <= 2)
- break;
-
- Work = *(base + p);
- S9xSetPPU (Work, 0x2102 + d->BAddress);
- p += inc;
- if (count <= 3)
- break;
-
- Work = *(base + p);
- S9xSetPPU (Work, 0x2103 + d->BAddress);
- p += inc;
- CHECK_SOUND();
- count -= 4;
- } while (count > 0);
- }
- }
- else
- {
- do
- {
- switch (d->TransferMode)
- {
- case 0:
- case 2:
-#ifndef VAR_CYCLES
- CPU.Cycles += 1;
-#endif
- Work = S9xGetPPU (0x2100 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- --count;
- break;
-
- case 1:
- case 5:
-#ifndef VAR_CYCLES
- CPU.Cycles += 3;
-#endif
- Work = S9xGetPPU (0x2100 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- if (!--count)
- break;
-
- Work = S9xGetPPU (0x2101 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- count--;
- break;
-
- case 3:
-#ifndef VAR_CYCLES
- CPU.Cycles += 6;
-#endif
- Work = S9xGetPPU (0x2100 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- if (!--count)
- break;
-
- Work = S9xGetPPU (0x2100 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- if (!--count)
- break;
-
- Work = S9xGetPPU (0x2101 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- if (!--count)
- break;
-
- Work = S9xGetPPU (0x2101 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- count--;
- break;
-
- case 4:
-#ifndef VAR_CYCLES
- CPU.Cycles += 6;
-#endif
- Work = S9xGetPPU (0x2100 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- if (!--count)
- break;
-
- Work = S9xGetPPU (0x2101 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- if (!--count)
- break;
-
- Work = S9xGetPPU (0x2102 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- if (!--count)
- break;
-
- Work = S9xGetPPU (0x2103 + d->BAddress);
- S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
- d->AAddress += inc;
- count--;
- break;
-
- default:
- count = 0;
- break;
- }
- CHECK_SOUND();
- } while (count);
- }
-
-//#ifdef SPC700_C
-#ifdef SPC700_SHUTDOWN
- CPU.APU_APUExecuting = Settings.APUEnabled;
-#endif
- asm_APU_EXECUTE(1); // execute but only in normal mode
-//#endif
- while (CPU.Cycles > CPU.NextEvent)
- S9xDoHBlankProcessing ();
-
-update_address:
- // Super Punch-Out requires that the A-BUS address be updated after the
- // DMA transfer.
- Memory.FillRAM[0x4302 + (Channel << 4)] = (uint8) d->AAddress;
- Memory.FillRAM[0x4303 + (Channel << 4)] = d->AAddress >> 8;
-
- // Secret of the Mana requires that the DMA bytes transfer count be set to
- // zero when DMA has completed.
- Memory.FillRAM [0x4305 + (Channel << 4)] = 0;
- Memory.FillRAM [0x4306 + (Channel << 4)] = 0;
-
- DMA[Channel].IndirectAddress = 0;
- d->TransferBytes = 0;
-
- CPU.InDMA = FALSE;
-}
-
-void S9xStartHDMA ()
-{
- //if (Settings.DisableHDMA)
- //IPPU.HDMA = 0;
- //else
- missing.hdma_this_frame = IPPU.HDMA = Memory.FillRAM [0x420c];
-
- IPPU.HDMAStarted = TRUE;
-
- for (uint8 i = 0; i < 8; i++)
- {
- if (IPPU.HDMA & (1 << i))
- {
- DMA [i].LineCount = 0;
- DMA [i].FirstLine = TRUE;
- DMA [i].Address = DMA [i].AAddress;
- }
- HDMAMemPointers [i] = NULL;
- }
-}
-
-uint8 S9xDoHDMA (uint8 byte)
-{
- struct SDMA *p = &DMA [0];
-
- int d = 0;
-
- for (uint8 mask = 1; mask; mask <<= 1, p++, d++)
- {
- if (byte & mask)
- {
- if (!p->LineCount)
- {
- uint8 line = S9xGetByte ((p->ABank << 16) + p->Address);
- if (line == 0x80)
- {
- p->Repeat = TRUE;
- p->LineCount = 128;
- }
- else
- {
- p->Repeat = !(line & 0x80);
- p->LineCount = line & 0x7f;
- }
-
- // Disable H-DMA'ing into V-RAM (register 2118) for Hook
- if (!p->LineCount || p->BAddress == 0x18)
- {
- byte &= ~mask;
- p->IndirectAddress += HDMAMemPointers [d] - HDMABasePointers [d];
- Memory.FillRAM [0x4305 + (d << 4)] = (uint8) p->IndirectAddress;
- Memory.FillRAM [0x4306 + (d << 4)] = p->IndirectAddress >> 8;
- continue;
- }
-
- p->Address++;
- p->FirstLine = 1;
- if (p->HDMAIndirectAddressing)
- {
- p->IndirectBank = Memory.FillRAM [0x4307 + (d << 4)];
- p->IndirectAddress = S9xGetWord ((p->ABank << 16) + p->Address);
- p->Address += 2;
- }
- else
- {
- p->IndirectBank = p->ABank;
- p->IndirectAddress = p->Address;
- }
- HDMABasePointers [d] = HDMAMemPointers [d] =
- S9xGetMemPointer ((p->IndirectBank << 16) + p->IndirectAddress);
- }
- else
- {
-
- if (!HDMAMemPointers [d])
- {
- if (!p->HDMAIndirectAddressing)
- {
- p->IndirectBank = p->ABank;
- p->IndirectAddress = p->Address;
- }
-
- if (!(HDMABasePointers [d] = HDMAMemPointers [d] =
- S9xGetMemPointer ((p->IndirectBank << 16) + p->IndirectAddress)))
- {
- byte &= ~mask;
- continue;
- }
- // Uncommenting the following line breaks Punchout - it starts
- // H-DMA during the frame.
- //p->FirstLine = TRUE;
- }
- }
- if (p->Repeat && !p->FirstLine)
- {
- p->LineCount--;
- continue;
- }
- switch (p->TransferMode)
- {
- case 0:
-#ifndef VAR_CYCLES
- CPU.Cycles += 1;
-#else
- CPU.Cycles += 8;
-#endif
- S9xSetPPU (*HDMAMemPointers [d]++, 0x2100 + p->BAddress);
- break;
- case 1:
- case 5:
-#ifndef VAR_CYCLES
- CPU.Cycles += 3;
-#else
- CPU.Cycles += 16;
-#endif
- S9xSetPPU (*(HDMAMemPointers [d] + 0), 0x2100 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 1), 0x2101 + p->BAddress);
- HDMAMemPointers [d] += 2;
- break;
- case 2:
- case 6:
-#ifndef VAR_CYCLES
- CPU.Cycles += 3;
-#else
- CPU.Cycles += 16;
-#endif
- S9xSetPPU (*(HDMAMemPointers [d] + 0), 0x2100 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 1), 0x2100 + p->BAddress);
- HDMAMemPointers [d] += 2;
- break;
- case 3:
- case 7:
-#ifndef VAR_CYCLES
- CPU.Cycles += 6;
-#else
- CPU.Cycles += 32;
-#endif
- S9xSetPPU (*(HDMAMemPointers [d] + 0), 0x2100 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 1), 0x2100 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 2), 0x2101 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 3), 0x2101 + p->BAddress);
- HDMAMemPointers [d] += 4;
- break;
- case 4:
-#ifndef VAR_CYCLES
- CPU.Cycles += 6;
-#else
- CPU.Cycles += 32;
-#endif
- S9xSetPPU (*(HDMAMemPointers [d] + 0), 0x2100 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 1), 0x2101 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 2), 0x2102 + p->BAddress);
- S9xSetPPU (*(HDMAMemPointers [d] + 3), 0x2103 + p->BAddress);
- HDMAMemPointers [d] += 4;
- break;
- }
- if (!p->HDMAIndirectAddressing)
- p->Address += HDMA_ModeByteCounts [p->TransferMode];
- p->FirstLine = FALSE;
- p->LineCount--;
- }
- }
- return (byte);
-}
-
-void S9xResetDMA ()
-{
- int d;
- for (d = 0; d < 8; d++)
- {
- DMA [d].TransferDirection = FALSE;
- DMA [d].HDMAIndirectAddressing = FALSE;
- DMA [d].AAddressFixed = TRUE;
- DMA [d].AAddressDecrement = FALSE;
- DMA [d].TransferMode = 0xff;
- DMA [d].ABank = 0xff;
- DMA [d].AAddress = 0xffff;
- DMA [d].Address = 0xffff;
- DMA [d].BAddress = 0xff;
- DMA [d].TransferBytes = 0xffff;
- }
- for (int c = 0x4300; c < 0x4380; c += 0x10)
- {
- for (d = c; d < c + 12; d++)
- Memory.FillRAM [d] = 0xff;
-
- Memory.FillRAM [c + 0xf] = 0xff;
- }
-}
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