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AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/PPU.cs

373 lines
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翻译中
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using Codice.CM.Client.Differences;
using System;
翻译中
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namespace VirtualNes.Core
VirtuaNesCore翻译中
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{
public class PPU
{
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private static byte[][] CreateCOLORMAP()
{
byte[][] res = new byte[5][];
res[0] = new byte[64]
{ 0x35, 0xFF, 0x16, 0x22, 0x1C, 0xFF, 0xFF, 0x15,
0xFF, 0x00, 0x27, 0x05, 0x04, 0x27, 0x08, 0x30,
0x21, 0xFF, 0xFF, 0x29, 0x3C, 0xFF, 0x36, 0x12,
0xFF, 0x2B, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01,
0xFF, 0x31, 0xFF, 0x2A, 0x2C, 0x0C, 0xFF, 0xFF,
0xFF, 0x07, 0x34, 0x06, 0x13, 0xFF, 0x26, 0x0F,
0xFF, 0x19, 0x10, 0x0A, 0xFF, 0xFF, 0xFF, 0x17,
0xFF, 0x11, 0x09, 0xFF, 0xFF, 0x25, 0x18, 0xFF
};
res[1] = new byte[64]
{ 0xFF, 0x27, 0x18, 0xFF, 0x3A, 0x25, 0xFF, 0x31,
0x16, 0x13, 0x38, 0x34, 0x20, 0x23, 0x31, 0x1A,
0xFF, 0x21, 0x06, 0xFF, 0x1B, 0x29, 0xFF, 0x22,
0xFF, 0x24, 0xFF, 0xFF, 0xFF, 0x08, 0xFF, 0x03,
0xFF, 0x36, 0x26, 0x33, 0x11, 0xFF, 0x10, 0x02,
0x14, 0xFF, 0x00, 0x09, 0x12, 0x0F, 0xFF, 0x30,
0xFF, 0xFF, 0x2A, 0x17, 0x0C, 0x01, 0x15, 0x19,
0xFF, 0x2C, 0x07, 0x37, 0xFF, 0x05, 0xFF, 0xFF
};
res[2] = new byte[64]
{ 0xFF, 0xFF, 0xFF, 0x10, 0x1A, 0x30, 0x31, 0x09,
0x01, 0x0F, 0x36, 0x08, 0x15, 0xFF, 0xFF, 0xF0,
0x22, 0x1C, 0xFF, 0x12, 0x19, 0x18, 0x17, 0xFF,
0x00, 0xFF, 0xFF, 0x02, 0x16, 0x06, 0xFF, 0x35,
0x23, 0xFF, 0x8B, 0xF7, 0xFF, 0x27, 0x26, 0x20,
0x29, 0xFF, 0x21, 0x24, 0x11, 0xFF, 0xEF, 0xFF,
0x2C, 0xFF, 0xFF, 0xFF, 0x07, 0xF9, 0x28, 0xFF,
0x0A, 0xFF, 0x32, 0x37, 0x13, 0xFF, 0xFF, 0x0C
};
res[3] = new byte[64]
{ 0x18, 0xFF, 0x1C, 0x89, 0x0F, 0xFF, 0x01, 0x17, // 00-07
0x10, 0x0F, 0x2A, 0xFF, 0x36, 0x37, 0x1A, 0xFF, // 08-0F
0x25, 0xFF, 0x12, 0xFF, 0x0F, 0xFF, 0xFF, 0x26, // 10-17
0xFF, 0xFF, 0x22, 0xFF, 0xFF, 0x0F, 0x3A, 0x21, // 18-1F
0x05, 0x0A, 0x07, 0xC2, 0x13, 0xFF, 0x00, 0x15, // 20-27
0x0C, 0xFF, 0x11, 0xFF, 0xFF, 0x38, 0xFF, 0xFF, // 28-2F
0xFF, 0xFF, 0x08, 0x16, 0xFF, 0xFF, 0x30, 0x3C, // 30-37
0x0F, 0x27, 0xFF, 0x60, 0x29, 0xFF, 0x30, 0x09 // 38-3F
};
res[4] = new byte[64]
{
// Super Xevious/Gradius
0x35, 0xFF, 0x16, 0x22, 0x1C, 0x09, 0xFF, 0x15, // 00-07
0x20, 0x00, 0x27, 0x05, 0x04, 0x28, 0x08, 0x30, // 08-0F
0x21, 0xFF, 0xFF, 0x29, 0x3C, 0xFF, 0x36, 0x12, // 10-17
0xFF, 0x2B, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, // 18-1F
0xFF, 0x31, 0xFF, 0x2A, 0x2C, 0x0C, 0x1B, 0xFF, // 20-27
0xFF, 0x07, 0x34, 0x06, 0xFF, 0x25, 0x26, 0x0F, // 28-2F
0xFF, 0x19, 0x10, 0x0A, 0xFF, 0xFF, 0xFF, 0x17, // 30-37
0xFF, 0x11, 0x1A, 0xFF, 0x38, 0xFF, 0x18, 0x3A, // 38-3F
};
return res;
}
private static byte[][] VSColorMap = CreateCOLORMAP();
翻译中
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// PPU Control Register #1 PPU #0
public const byte PPU_VBLANK_BIT = 0x80;
public const byte PPU_SPHIT_BIT = 0x40; // 堘偆丠
public const byte PPU_SP16_BIT = 0x20;
public const byte PPU_BGTBL_BIT = 0x10;
public const byte PPU_SPTBL_BIT = 0x08;
public const byte PPU_INC32_BIT = 0x04;
public const byte PPU_NAMETBL_BIT = 0x03;
// PPU Control Register #2 PPU #1
public const byte PPU_BGCOLOR_BIT = 0xE0;
public const byte PPU_SPDISP_BIT = 0x10;
public const byte PPU_BGDISP_BIT = 0x08;
public const byte PPU_SPCLIP_BIT = 0x04;
public const byte PPU_BGCLIP_BIT = 0x02;
public const byte PPU_COLORMODE_BIT = 0x01;
// PPU Status Register PPU #2
public const byte PPU_VBLANK_FLAG = 0x80;
public const byte PPU_SPHIT_FLAG = 0x40;
public const byte PPU_SPMAX_FLAG = 0x20;
public const byte PPU_WENABLE_FLAG = 0x10;
// SPRITE Attribute
public const byte SP_VMIRROR_BIT = 0x80;
public const byte SP_HMIRROR_BIT = 0x40;
public const byte SP_PRIORITY_BIT = 0x20;
public const byte SP_COLOR_BIT = 0x03;
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private NES nes;
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private bool bExtLatch; // For MMC5
private bool bChrLatch; // For MMC2/MMC4
private bool bExtNameTable; // For Super Monkey no Dai Bouken
private bool bExtMono; // For Final Fantasy
private ushort loopy_y;
private ushort loopy_shift;
VirtuaNesCore翻译中
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private byte[] lpScreen;
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/// <summary> 作为lpScreen数组的索引 </summary>
private int lpScanline;
private int ScanlineNo;
VirtuaNesCore翻译中
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private byte[] lpColormode;
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VirtuaNesCore翻译中
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private bool bVSMode;
private int nVSColorMap;
private byte VSSecurityData;
private byte[] Bit2Rev = new byte[256];
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翻译中
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VirtuaNesCore翻译中
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public PPU(NES nes)
{
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this.nes = nes;
VirtuaNesCore翻译中
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lpScreen = null;
lpColormode = null;
bVSMode = false;
nVSColorMap = -1;
VSSecurityData = 0;
for (int i = 0; i < 256; i++)
{
byte m = 0x80;
byte c = 0;
for (int j = 0; j < 8; j++)
{
if ((i & (1 << j)) > 0) c |= m;
m >>= 1;
}
Bit2Rev[i] = c;
}
}
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public void Dispose() { }
翻译中
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翻译中
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internal byte Read(ushort addr)
{
byte data = 0x00;
switch (addr)
{
// Write only Register
case 0x2000: // PPU Control Register #1(W)
case 0x2001: // PPU Control Register #2(W)
case 0x2003: // SPR-RAM Address Register(W)
case 0x2005: // PPU Scroll Register(W2)
case 0x2006: // VRAM Address Register(W2)
data = MMU.PPU7_Temp; // 懡暘
break;
// Read/Write Register
case 0x2002: // PPU Status Register(R)
//DEBUGOUT( "2002 RD L:%3d C:%8d\n", ScanlineNo, nes->cpu->GetTotalCycles() );
data = (byte)(MMU.PPUREG[2] | VSSecurityData);
MMU.PPU56Toggle = 0;
byte temp = unchecked((byte)~PPU_VBLANK_FLAG);
MMU.PPUREG[2] &= temp;
break;
case 0x2004: // SPR_RAM I/O Register(RW)
data = MMU.SPRAM[MMU.PPUREG[3]++];
break;
case 0x2007: // VRAM I/O Register(RW)
addr = (ushort)(MMU.loopy_v & 0x3FFF);
data = MMU.PPU7_Temp;
if ((MMU.PPUREG[0] & PPU_INC32_BIT) != 0) MMU.loopy_v += 32;
else MMU.loopy_v++;
if (addr >= 0x3000)
{
if (addr >= 0x3F00)
{
// data &= 0x3F;
if ((addr & 0x0010) == 0)
{
return MMU.BGPAL[addr & 0x000F];
}
else
{
return MMU.SPPAL[addr & 0x000F];
}
}
addr &= 0xEFFF;
}
迭代
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MMU.PPU7_Temp = MMU.PPU_MEM_BANK[addr >> 10].Span[addr & 0x03FF];
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break;
}
return data;
}
翻译中
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internal void SetRenderScanline(int scanline)
{
ScanlineNo = scanline;
if (scanline < 240)
{
lpScanline = (int)(Screen.SCREEN_WIDTH) * scanline;
}
}
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internal void Write(ushort addr, byte data)
{
if (bVSMode && VSSecurityData != 0)
{
if (addr == 0x2000)
{
addr = 0x2001;
}
else if (addr == 0x2001)
{
addr = 0x2000;
}
}
switch (addr)
{
// Read only Register
case 0x2002: // PPU Status register(R)
break;
// Write Register
case 0x2000: // PPU Control Register #1(W)
// NameTable select
// t:0000110000000000=d:00000011
MMU.loopy_t = (ushort)((MMU.loopy_t & 0xF3FF) | ((data & 0x03) << 10));
if ((data & 0x80) != 0 && (MMU.PPUREG[0] & 0x80) == 0 && (MMU.PPUREG[2] & 0x80) != 0)
{
nes.cpu.NMI(); // hmm...
}
MMU.PPUREG[0] = data;
break;
case 0x2001: // PPU Control Register #2(W)
MMU.PPUREG[1] = data;
break;
case 0x2003: // SPR-RAM Address Register(W)
MMU.PPUREG[3] = data;
break;
case 0x2004: // SPR_RAM I/O Register(RW)
MMU.SPRAM[MMU.PPUREG[3]++] = data;
break;
case 0x2005: // PPU Scroll Register(W2)
//DEBUGOUT( "SCR WRT L:%3d C:%8d\n", ScanlineNo, nes->cpu->GetTotalCycles() );
if (MMU.PPU56Toggle == 0)
{
// First write
// tile X t:0000000000011111=d:11111000
MMU.loopy_t = (ushort)((MMU.loopy_t & 0xFFE0) | ((data) >> 3));
// scroll offset X x=d:00000111
MMU.loopy_x = (ushort)(data & 0x07);
}
else
{
// Second write
// tile Y t:0000001111100000=d:11111000
MMU.loopy_t = (ushort)((MMU.loopy_t & 0xFC1F) | (((data) & 0xF8) << 2));
// scroll offset Y t:0111000000000000=d:00000111
MMU.loopy_t = (ushort)((MMU.loopy_t & 0x8FFF) | (((data) & 0x07) << 12));
}
MMU.PPU56Toggle = (byte)(MMU.PPU56Toggle == 0 ? 1 : 0);
break;
case 0x2006: // VRAM Address Register(W2)
if (MMU.PPU56Toggle == 0)
{
// First write
// t:0011111100000000=d:00111111
// t:1100000000000000=0
MMU.loopy_t = (ushort)((MMU.loopy_t & 0x00FF) | (((data) & 0x3F) << 8));
}
else
{
// Second write
// t:0000000011111111=d:11111111
MMU.loopy_t = (ushort)((MMU.loopy_t & 0xFF00) | data);
// v=t
MMU.loopy_v = MMU.loopy_t;
nes.mapper.PPU_Latch(MMU.loopy_v);
}
MMU.PPU56Toggle = (byte)(MMU.PPU56Toggle == 0 ? 1 : 0);
break;
case 0x2007: // VRAM I/O Register(RW)
ushort vaddr = (ushort)(MMU.loopy_v & 0x3FFF);
if ((MMU.PPUREG[0] & PPU_INC32_BIT) != 0) MMU.loopy_v += 32;
else MMU.loopy_v++;
if (vaddr >= 0x3000)
{
if (vaddr >= 0x3F00)
{
data &= 0x3F;
if (bVSMode && nVSColorMap != -1)
{
byte temp = VSColorMap[nVSColorMap][data];
if (temp != 0xFF)
{
data = (byte)(temp & 0x3F);
}
}
if ((vaddr & 0x000F) == 0)
{
MMU.BGPAL[0] = MMU.SPPAL[0] = data;
}
else if ((vaddr & 0x0010) == 0)
{
MMU.BGPAL[vaddr & 0x000F] = data;
}
else
{
MMU.SPPAL[vaddr & 0x000F] = data;
}
MMU.BGPAL[0x04] = MMU.BGPAL[0x08] = MMU.BGPAL[0x0C] = MMU.BGPAL[0x00];
MMU.SPPAL[0x00] = MMU.SPPAL[0x04] = MMU.SPPAL[0x08] = MMU.SPPAL[0x0C] = MMU.BGPAL[0x00];
return;
}
vaddr &= 0xEFFF;
}
if (MMU.PPU_MEM_TYPE[vaddr >> 10] != MMU.BANKTYPE_VROM)
{
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MMU.PPU_MEM_BANK[vaddr >> 10].Span[vaddr & 0x03FF] = data;
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}
break;
}
}
internal void DMA(byte data)
{
ushort addr = (ushort)(data << 8);
for (ushort i = 0; i < 256; i++)
{
MMU.SPRAM[i] = nes.Read((ushort)(addr + i));
}
}
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internal void Reset()
{
bExtLatch = false;
bChrLatch = false;
bExtNameTable = false;
bExtMono = false;
MMU.PPUREG[0] = MMU.PPUREG[1] = 0;
MMU.PPU56Toggle = 0;
MMU.PPU7_Temp = 0xFF; // VS Excitebike偱偍偐偟偔側傞($2006傪撉傒偵峴偔僶僌偑偁傞)
// PPU7_Temp = 0;
MMU.loopy_v = MMU.loopy_t = 0;
MMU.loopy_x = loopy_y = 0;
loopy_shift = 0;
if (lpScreen != null)
MemoryUtility.memset(lpScreen, 0x3F, (int)(Screen.SCREEN_WIDTH) * (int)(Screen.SCREEN_HEIGHT));
if (lpColormode != null)
MemoryUtility.memset(lpColormode, 0, (int)(Screen.SCREEN_HEIGHT));
}
翻译中
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private enum Screen
{
SCREEN_WIDTH = 256 + 16,
SCREEN_HEIGHT = 240
}
VirtuaNesCore翻译中
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}
}
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