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dma.cpp
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/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson ([email protected]) and
* Jerremy Koot ([email protected])
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar ([email protected]) 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 ([email protected]).
*
* 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"
#include "sa1.h"
#ifdef SDD1_DECOMP
#include "sdd1emu.h"
#endif
#ifdef SDD1_DECOMP
uint32 __yo_for_alignement;
uint8 *sdd1_buffer;//[0x10000];
#endif
extern int HDMA_ModeByteCounts [8];
extern uint8 *HDMAMemPointers [8];
extern uint8 *HDMABasePointers [8];
// #define SETA010_HDMA_FROM_CART
#ifdef SETA010_HDMA_FROM_CART
uint32 HDMARawPointers[8]; // Cart address space pointer
#endif
#if defined(__linux__) || defined(__WIN32__) || defined(__MACOSX__)
static int S9xCompareSDD1IndexEntries (const void *p1, const void *p2)
{
return (*(uint32 *) p1 - *(uint32 *) p2);
}
#endif
/**********************************************************************************************/
/* S9xDoDMA() */
/* This function preforms the general dma transfer */
/**********************************************************************************************/
void S9xDoDMA (uint8 Channel)
{
uint8 Work;
if (Channel > 7 || CPUPack.CPU.InDMA)
return;
CPUPack.CPU.InDMA = TRUE;
bool8 in_sa1_dma = FALSE;
uint8 *in_sdd1_dma = NULL;
uint8 *spc7110_dma=NULL;
bool s7_wrap=false;
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;
//does an invalid DMA actually take time?
// I'd say yes, since 'invalid' is probably just the WRAM chip
// not being able to read and write itself at the same time
CPUPack.CPU.Cycles+=(d->TransferBytes+1)*SLOW_ONE_CYCLE;
// S9xUpdateAPUTimer();
goto update_address;
}
switch (d->BAddress)
{
case 0x18:
case 0x19:
if (IPPU.RenderThisFrame)
FLUSH_REDRAW ();
break;
}
if (Settings.SDD1)
{
if (d->AAddressFixed && 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 |= FillRAM [0x4804 + ((d->ABank - 0xc0) >> 4)];
#ifdef SDD1_DECOMP
if(Settings.SDD1Pack)
{
uint8* in_ptr=GetBasePointer(((d->ABank << 16) | d->AAddress));
in_ptr+=d->AAddress;
SDD1_decompress(sdd1_buffer,in_ptr,d->TransferBytes);
in_sdd1_dma=sdd1_buffer;
#ifdef SDD1_VERIFY
void *ptr = bsearch (&address, Memory.SDD1Index,
Memory.SDD1Entries, 12, S9xCompareSDD1IndexEntries);
if(memcmp(sdd1_buffer, ptr, d->TransferBytes))
{
uint8 *p = Memory.SDD1LoggedData;
bool8 found = FALSE;
uint8 SDD1Bank = 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;
}
}
if (!found && Memory.SDD1LoggedDataCount < MEMMAP_MAX_SDD1_LOGGED_ENTRIES)
{
int j=0;
while(ptr[j]==sdd1_buffer[j])
j++;
*p = d->ABank;
*(p + 1) = d->AAddress >> 8;
*(p + 2) = d->AAddress & 0xff;
*(p + 3) = j&0xFF;
*(p + 4) = (j>>8)&0xFF;
*(p + 7) = SDD1Bank;
Memory.SDD1LoggedDataCount += 1;
}
}
#endif
}
else
{
#endif
#if defined(__linux__) || defined (__WIN32__) || defined(__MACOSX__)
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 = 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;
}
}
}
#ifdef SDD1_DECOMP
}
#endif
FillRAM [0x4801] = 0;
}
/* if(Settings.SPC7110&&(d->AAddress==0x4800||d->ABank==0x50))
{
uint32 i,j;
i=(s7r.reg4805|(s7r.reg4806<<8));
#ifdef SPC7110_DEBUG
printf("DMA Transfer of %04X bytes from %02X%02X%02X:%02X, offset of %04X, internal bank of %04X, multiplier %02X\n",d->TransferBytes,s7r.reg4803,s7r.reg4802,s7r.reg4801, s7r.reg4804,i, s7r.bank50Internal, s7r.AlignBy);
#endif
i*=s7r.AlignBy;
i+=s7r.bank50Internal;
i%=DECOMP_BUFFER_SIZE;
j=0;
if((i+d->TransferBytes)<DECOMP_BUFFER_SIZE)
{
spc7110_dma=&s7r.bank50[i];
}
else
{
#ifdef PSP
#if 0
spc7110_dma=(uint8 *) malloc (sizeof (uint8) * d->TransferBytes);
#endif
#else
spc7110_dma=new uint8[d->TransferBytes];
#endif
j=DECOMP_BUFFER_SIZE-i;
memcpy(spc7110_dma, &s7r.bank50[i], j);
memcpy(&spc7110_dma[j],s7r.bank50,d->TransferBytes-j);
s7_wrap=true;
}
int icount=s7r.reg4809|(s7r.reg480A<<8);
icount-=d->TransferBytes;
s7r.reg4809=0x00ff&icount;
s7r.reg480A=(0xff00&icount)>>8;
s7r.bank50Internal+=d->TransferBytes;
s7r.bank50Internal%=DECOMP_BUFFER_SIZE;
inc=1;
d->AAddress-=count;
}*/
if (d->BAddress == 0x18 && SA1Pack.SA1.in_char_dma && (d->ABank & 0xf0) == 0x40)
{
// Perform packed bitmap to PPU character format conversion on the
// data before transmitting it to V-RAM via-DMA.
int num_chars = 1 << ((FillRAM [0x2231] >> 2) & 7);
int depth = (FillRAM [0x2231] & 3) == 0 ? 8 :
(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 = &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;
}
}
#ifdef DEBUGGER
if (Settings.TraceDMA)
{
sprintf (String, "DMA[%d]: %s Mode: %d 0x%02X%04X->0x21%02X Bytes: %d (%s) V-Line:%ld",
Channel, d->TransferDirection ? "read" : "write",
d->TransferMode, d->ABank, d->AAddress,
d->BAddress, d->TransferBytes,
d->AAddressFixed ? "fixed" :
(d->AAddressDecrement ? "dec" : "inc"),
CPUPack.CPU.V_Counter);
if (d->BAddress == 0x18 || d->BAddress == 0x19 || d->BAddress == 0x39 || d->BAddress == 0x3a)
sprintf (String, "%s VRAM: %04X (%d,%d) %s", String,
PPU.VMA.Address,
PPU.VMA.Increment, PPU.VMA.FullGraphicCount,
PPU.VMA.High ? "word" : "byte");
else
if (d->BAddress == 0x22 || d->BAddress == 0x3b)
sprintf (String, "%s CGRAM: %02X (%x)", String, PPU.CGADD,
PPU.CGFLIP);
else
if (d->BAddress == 0x04 || d->BAddress == 0x38)
sprintf (String, "%s OBJADDR: %04X", String, PPU.OAMAddr);
S9xMessage (S9X_TRACE, S9X_DMA_TRACE, String);
}
#endif
if (!d->TransferDirection)
{
/* XXX: DMA is potentially broken here for cases where we DMA across
* XXX: memmap boundries. A possible solution would be to re-call
* XXX: GetBasePointer whenever we cross a boundry, and when
* XXX: GetBasePointer returns (0) to take the 'slow path' and use
* XXX: S9xGetByte instead of *base. GetBasePointer() would want to
* XXX: return (0) for MAP_PPU and whatever else is a register range
* XXX: rather than a RAM/ROM block, and we'd want to detect MAP_PPU
* XXX: (or specifically, Address Bus B addresses $2100-$21FF in
* XXX: banks $00-$3F) specially and treat it as MAP_NONE (since
* XXX: PPU->PPU transfers don't work).
*/
//reflects extra cycle used by DMA
CPUPack.CPU.Cycles += SLOW_ONE_CYCLE * (count+1);
// S9xUpdateAPUTimer();
uint8 *base = GetBasePointer ((d->ABank << 16) + d->AAddress);
uint16 p = d->AAddress;
if (!base)
base = ROM;
if (in_sa1_dma)
{
base = &ROM [CMemory::MAX_ROM_SIZE - 0x10000];
p = 0;
}
if (in_sdd1_dma)
{
base = in_sdd1_dma;
p = 0;
}
if(spc7110_dma)
{
base=spc7110_dma;
p = 0;
}
if (inc > 0)
d->AAddress += count;
else
if (inc < 0)
d->AAddress -= count;
if (d->TransferMode == 0 || d->TransferMode == 2 || d->TransferMode == 6)
{
switch (d->BAddress)
{
case 0x04:
do
{
Work = *(base + p);
REGISTER_2104(Work);
p += inc;
CHECK_SOUND();
} while (--count > 0);
break;
case 0x18:
#ifndef CORRECT_VRAM_READS
IPPU.FirstVRAMRead = TRUE;
#endif
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:
#ifndef CORRECT_VRAM_READS
IPPU.FirstVRAMRead = TRUE;
#endif
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
#ifndef CORRECT_VRAM_READS
IPPU.FirstVRAMRead = TRUE;
#endif
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 || d->TransferMode == 7)
{
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
{
#ifdef DEBUGGER
// if (Settings.TraceDMA)
{
sprintf (String, "Unknown DMA transfer mode: %d on channel %d\n",
d->TransferMode, Channel);
S9xMessage (S9X_TRACE, S9X_DMA_TRACE, String);
}
#endif
}
}
else
{
/* XXX: DMA is potentially broken here for cases where the dest is
* XXX: in the Address Bus B range. Note that this bad dest may not
* XXX: cover the whole range of the DMA though, if we transfer
* XXX: 65536 bytes only 256 of them may be Address Bus B.
*/
do
{
switch (d->TransferMode)
{
case 0:
case 2:
case 6:
Work = S9xGetPPU (0x2100 + d->BAddress);
S9xSetByte (Work, (d->ABank << 16) + d->AAddress);
d->AAddress += inc;
--count;
break;
case 1:
case 5:
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:
case 7:
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:
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:
#ifdef DEBUGGER
if (1) //Settings.TraceDMA)
{
sprintf (String, "Unknown DMA transfer mode: %d on channel %d\n",
d->TransferMode, Channel);
S9xMessage (S9X_TRACE, S9X_DMA_TRACE, String);
}
#endif
count = 0;
break;
}
CHECK_SOUND();
} while (count);
}
#ifdef SPC700_C
(IAPU_APUExecuting) = Settings.APUEnabled;
if (IAPU_APUExecuting) {
if (CPUPack.CPU.Cycles-old_cpu_cycles<0) msgBoxLines("2",60);
else cpu_glob_cycles += CPUPack.CPU.Cycles-old_cpu_cycles;
old_cpu_cycles=CPUPack.CPU.Cycles;
apu_glob_cycles=cpu_glob_cycles;
if (cpu_glob_cycles>=0x00700000) {
APU_EXECUTE2 ();
}
}
//APU_EXECUTE ();
#endif
while (CPUPack.CPU.Cycles > CPUPack.CPU.NextEvent) S9xDoHBlankProcessing ();
// S9xUpdateAPUTimer();
/* if(Settings.SPC7110&&spc7110_dma)
{
if(spc7110_dma&&s7_wrap) {
#ifdef PSP
free (spc7110_dma);
#else
delete [] spc7110_dma;
#endif
}
}*/
update_address:
// Super Punch-Out requires that the A-BUS address be updated after the
// DMA transfer.
FillRAM[0x4302 + (Channel << 4)] = (uint8) d->AAddress;
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.
FillRAM [0x4305 + (Channel << 4)] = 0;
FillRAM [0x4306 + (Channel << 4)] = 0;
DMA[Channel].IndirectAddress = 0;
d->TransferBytes = 0;
CPUPack.CPU.InDMA = FALSE;
}
void S9xStartHDMA () {
if (Settings.DisableHDMA) IPPU.HDMA = 0;
else IPPU.HDMA = FillRAM [0x420c];
// missing.hdma_this_frame = IPPU.HDMA = FillRAM [0x420c];
//per anomie timing post
if(IPPU.HDMA!=0) {
CPUPack.CPU.Cycles+=ONE_CYCLE*3;
// S9xUpdateAPUTimer();
}
IPPU.HDMAStarted = TRUE;
for (uint8 i = 0; i < 8; i++) {
if (IPPU.HDMA & (1 << i)) {
CPUPack.CPU.Cycles+=SLOW_ONE_CYCLE ;
// S9xUpdateAPUTimer();
DMA [i].LineCount = 0;
DMA [i].FirstLine = TRUE;
DMA [i].Address = DMA [i].AAddress;
if(DMA[i].HDMAIndirectAddressing) {
CPUPack.CPU.Cycles+=(SLOW_ONE_CYCLE <<2);
// S9xUpdateAPUTimer();
}
}
HDMAMemPointers [i] = NULL;
#ifdef SETA010_HDMA_FROM_CART
HDMARawPointers [i] = 0;
#endif
}
}
#ifdef DEBUGGER
void S9xTraceSoundDSP (const char *s, int i1 = 0, int i2 = 0, int i3 = 0,
int i4 = 0, int i5 = 0, int i6 = 0, int i7 = 0);
#endif
uint8 S9xDoHDMA (uint8 byte) {
struct SDMA *p = &DMA [0];
int d = 0;
CPUPack.CPU.InDMA = TRUE;
CPUPack.CPU.Cycles+=ONE_CYCLE*3;
// S9xUpdateAPUTimer();
for (uint8 mask = 1; mask; mask <<= 1, p++, d++) {
if (byte & mask) {
if (!p->LineCount) {
//remember, InDMA is set.
//Get/Set incur no charges!
CPUPack.CPU.Cycles+=SLOW_ONE_CYCLE;
// S9xUpdateAPUTimer();
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
/* XXX: instead of p->BAddress == 0x18, make S9xSetPPU fail
* XXX: writes to $2118/9 when appropriate
*/
#ifdef SETA010_HDMA_FROM_CART
if (!p->LineCount) {
#else
if (!p->LineCount || p->BAddress == 0x18) {
#endif
byte &= ~mask;
p->IndirectAddress += HDMAMemPointers [d] - HDMABasePointers [d];
FillRAM [0x4305 + (d << 4)] = (uint8) p->IndirectAddress;
FillRAM [0x4306 + (d << 4)] = p->IndirectAddress >> 8;
continue;
}
p->Address++;
p->FirstLine = 1;
if (p->HDMAIndirectAddressing) {
p->IndirectBank = FillRAM [0x4307 + (d << 4)];
//again, no cycle charges while InDMA is set!
CPUPack.CPU.Cycles+=SLOW_ONE_CYCLE<<2;
// S9xUpdateAPUTimer();
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);
#ifdef SETA010_HDMA_FROM_CART
HDMARawPointers [d] = (p->IndirectBank << 16) + p->IndirectAddress;
#endif
} else {
CPUPack.CPU.Cycles += SLOW_ONE_CYCLE;
// S9xUpdateAPUTimer();
}
if (!HDMAMemPointers [d]) {
if (!p->HDMAIndirectAddressing) {
p->IndirectBank = p->ABank;
p->IndirectAddress = p->Address;
}
#ifdef SETA010_HDMA_FROM_CART
HDMARawPointers [d] = (p->IndirectBank << 16) + p->IndirectAddress;
#endif
if (!(HDMABasePointers [d] = HDMAMemPointers [d] = S9xGetMemPointer ((p->IndirectBank << 16) + p->IndirectAddress))) {
/* XXX: Instead of this, goto a slow path that first
* XXX: verifies src!=Address Bus B, then uses
* XXX: S9xGetByte(). Or make S9xGetByte return OpenBus
* XXX: (probably?) for Address Bus B while inDMA.
*/
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;
}
if (p->BAddress == 0x04) {
if(SNESGameFixes.Uniracers) {
PPU.OAMAddr = 0x10c;
PPU.OAMFlip=0;
}
}
switch (p->TransferMode) {
case 0:
CPUPack.CPU.Cycles += SLOW_ONE_CYCLE;
// S9xUpdateAPUTimer();
#ifdef SETA010_HDMA_FROM_CART
S9xSetPPU (S9xGetByte (HDMARawPointers [d]++), 0x2100 + p->BAddress);
HDMAMemPointers [d]++;
#else
S9xSetPPU (*HDMAMemPointers [d]++, 0x2100 + p->BAddress);
#endif