forked from sin365/AxibugEmuOnline
1203 lines
50 KiB
C#
1203 lines
50 KiB
C#
namespace VirtualNes.Core
|
|
{
|
|
public class PPU
|
|
{
|
|
public const int SCREEN_WIDTH = 256 + 16;
|
|
public const int SCREEN_HEIGHT = 240;
|
|
|
|
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();
|
|
|
|
// 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;
|
|
|
|
private NES nes;
|
|
|
|
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;
|
|
|
|
private uint[] lpScreen;
|
|
/// <summary> 作为lpScreen数组的索引 </summary>
|
|
private int lpScanline;
|
|
private int ScanlineNo;
|
|
private byte[] lpColormode;
|
|
|
|
private bool bVSMode;
|
|
private int nVSColorMap;
|
|
private byte VSSecurityData;
|
|
private byte[] Bit2Rev = new byte[256];
|
|
|
|
|
|
public PPU(NES nes)
|
|
{
|
|
this.nes = nes;
|
|
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;
|
|
}
|
|
}
|
|
|
|
public void Dispose() { }
|
|
|
|
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;
|
|
}
|
|
MMU.PPU7_Temp = MMU.PPU_MEM_BANK[addr >> 10][addr & 0x03FF];
|
|
break;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
internal void SetRenderScanline(int scanline)
|
|
{
|
|
ScanlineNo = scanline;
|
|
if (scanline < 240)
|
|
{
|
|
lpScanline = (SCREEN_WIDTH) * scanline;
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
MMU.PPU_MEM_BANK[vaddr >> 10][vaddr & 0x03FF] = data;
|
|
}
|
|
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));
|
|
}
|
|
}
|
|
|
|
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, 0, 0x3F, SCREEN_WIDTH * SCREEN_HEIGHT);
|
|
if (lpColormode != null)
|
|
MemoryUtility.memset(lpColormode, 0, SCREEN_HEIGHT);
|
|
}
|
|
|
|
internal void FrameStart()
|
|
{
|
|
if ((MMU.PPUREG[1] & (PPU_SPDISP_BIT | PPU_BGDISP_BIT)) != 0)
|
|
{
|
|
MMU.loopy_v = MMU.loopy_t;
|
|
loopy_shift = MMU.loopy_x;
|
|
loopy_y = (ushort)((MMU.loopy_v & 0x7000) >> 12);
|
|
}
|
|
|
|
if (lpScreen != null)
|
|
{
|
|
MemoryUtility.memset(lpScreen, 0, 0x3F, SCREEN_WIDTH);
|
|
}
|
|
if (lpColormode != null)
|
|
{
|
|
lpColormode[0] = 0;
|
|
}
|
|
}
|
|
|
|
internal void ScanlineNext()
|
|
{
|
|
if ((MMU.PPUREG[1] & (PPU_BGDISP_BIT | PPU_SPDISP_BIT)) != 0)
|
|
{
|
|
if ((MMU.loopy_v & 0x7000) == 0x7000)
|
|
{
|
|
MMU.loopy_v &= 0x8FFF;
|
|
if ((MMU.loopy_v & 0x03E0) == 0x03A0)
|
|
{
|
|
MMU.loopy_v ^= 0x0800;
|
|
MMU.loopy_v &= 0xFC1F;
|
|
}
|
|
else
|
|
{
|
|
if ((MMU.loopy_v & 0x03E0) == 0x03E0)
|
|
{
|
|
MMU.loopy_v &= 0xFC1F;
|
|
}
|
|
else
|
|
{
|
|
MMU.loopy_v += 0x0020;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
MMU.loopy_v += 0x1000;
|
|
}
|
|
loopy_y = (ushort)((MMU.loopy_v & 0x7000) >> 12);
|
|
}
|
|
}
|
|
|
|
internal void ScanlineStart()
|
|
{
|
|
if ((MMU.PPUREG[1] & (PPU_BGDISP_BIT | PPU_SPDISP_BIT)) != 0)
|
|
{
|
|
MMU.loopy_v = (ushort)((MMU.loopy_v & 0xFBE0) | (MMU.loopy_t & 0x041F));
|
|
loopy_shift = MMU.loopy_x;
|
|
loopy_y = (ushort)((MMU.loopy_v & 0x7000) >> 12);
|
|
nes.mapper.PPU_Latch((ushort)(0x2000 + (MMU.loopy_v & 0x0FFF)));
|
|
}
|
|
}
|
|
|
|
private byte[] BGwrite = new byte[33 + 1];
|
|
private byte[] BGmono = new byte[33 + 1];
|
|
private byte[] SPwrite = new byte[33 + 1];
|
|
|
|
internal void Scanline(int scanline, bool bMax, bool bLeftClip)
|
|
{
|
|
int pScn = 0;
|
|
int pBGw = 0;
|
|
byte chr_h = 0, chr_l = 0, attr = 0;
|
|
|
|
MemoryUtility.ZEROMEMORY(BGwrite, BGwrite.Length);
|
|
MemoryUtility.ZEROMEMORY(BGmono, BGmono.Length);
|
|
|
|
// Linecolor mode
|
|
lpColormode[scanline] = (byte)(((MMU.PPUREG[1] & PPU_BGCOLOR_BIT) >> 5) | ((MMU.PPUREG[1] & PPU_COLORMODE_BIT) << 7));
|
|
|
|
// Render BG
|
|
if ((MMU.PPUREG[1] & PPU_BGDISP_BIT) == 0)
|
|
{
|
|
MemoryUtility.memset(lpScreen, lpScanline, MMU.BGPAL[0], SCREEN_WIDTH);
|
|
if (nes.GetRenderMethod() == EnumRenderMethod.TILE_RENDER)
|
|
{
|
|
nes.EmulationCPU(NES.FETCH_CYCLES * 4 * 32);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (nes.GetRenderMethod() != EnumRenderMethod.TILE_RENDER)
|
|
{
|
|
if (!bExtLatch)
|
|
{
|
|
// Without Extension Latch
|
|
pScn = lpScanline + (8 - loopy_shift);
|
|
pBGw = 0;
|
|
|
|
int tileofs = (MMU.PPUREG[0] & PPU_BGTBL_BIT) << 8;
|
|
int ntbladr = 0x2000 + (MMU.loopy_v & 0x0FFF);
|
|
int attradr = 0x23C0 + (MMU.loopy_v & 0x0C00) + ((MMU.loopy_v & 0x0380) >> 4);
|
|
int ntbl_x = ntbladr & 0x001F;
|
|
int attrsft = (ntbladr & 0x0040) >> 4;
|
|
var pNTBL = MMU.PPU_MEM_BANK[ntbladr >> 10];
|
|
|
|
int tileadr;
|
|
int cache_tile = unchecked((int)(0xFFFF0000));
|
|
byte cache_attr = 0xFF;
|
|
|
|
chr_h = chr_l = attr = 0;
|
|
|
|
attradr &= 0x3FF;
|
|
|
|
|
|
for (int i = 0; i < 33; i++)
|
|
{
|
|
tileadr = tileofs + pNTBL[ntbladr & 0x03FF] * 0x10 + loopy_y;
|
|
attr = (byte)(((pNTBL[attradr + (ntbl_x >> 2)] >> ((ntbl_x & 2) + attrsft)) & 3) << 2);
|
|
|
|
if (cache_tile == tileadr && cache_attr == attr)
|
|
{
|
|
lpScreen[pScn + 0] = lpScreen[pScn - 8];
|
|
lpScreen[pScn + 0 + 1] = lpScreen[pScn - 8 + 1];
|
|
lpScreen[pScn + 0 + 2] = lpScreen[pScn - 8 + 2];
|
|
lpScreen[pScn + 0 + 3] = lpScreen[pScn - 8 + 3];
|
|
|
|
lpScreen[pScn + 4] = lpScreen[pScn - 4];
|
|
lpScreen[pScn + 4 + 1] = lpScreen[pScn - 4 + 1];
|
|
lpScreen[pScn + 4 + 2] = lpScreen[pScn - 4 + 2];
|
|
lpScreen[pScn + 4 + 3] = lpScreen[pScn - 4 + 3];
|
|
|
|
BGwrite[pBGw + 0] = BGwrite[pBGw - 1];
|
|
}
|
|
else
|
|
{
|
|
cache_tile = tileadr;
|
|
cache_attr = attr;
|
|
chr_l = MMU.PPU_MEM_BANK[tileadr >> 10][tileadr & 0x03FF];
|
|
chr_h = MMU.PPU_MEM_BANK[tileadr >> 10][(tileadr & 0x03FF) + 8];
|
|
BGwrite[pBGw] = (byte)(chr_h | chr_l);
|
|
|
|
int pBGPAL = attr;
|
|
{
|
|
int c1 = ((chr_l >> 1) & 0x55) | (chr_h & 0xAA);
|
|
int c2 = (chr_l & 0x55) | ((chr_h << 1) & 0xAA);
|
|
lpScreen[pScn + 0] = MMU.BGPAL[pBGPAL + (c1 >> 6)];
|
|
lpScreen[pScn + 4] = MMU.BGPAL[pBGPAL + ((c1 >> 2) & 3)];
|
|
lpScreen[pScn + 1] = MMU.BGPAL[pBGPAL + ((c1 >> 6))];
|
|
lpScreen[pScn + 5] = MMU.BGPAL[pBGPAL + ((c2 >> 2) & 3)];
|
|
lpScreen[pScn + 2] = MMU.BGPAL[pBGPAL + ((c1 >> 4) & 3)];
|
|
lpScreen[pScn + 6] = MMU.BGPAL[pBGPAL + (c1 & 3)];
|
|
lpScreen[pScn + 3] = MMU.BGPAL[pBGPAL + ((c2 >> 4) & 3)];
|
|
lpScreen[pScn + 7] = MMU.BGPAL[pBGPAL + (c2 & 3)];
|
|
}
|
|
}
|
|
pScn += 8;
|
|
pBGw++;
|
|
|
|
// Character latch(For MMC2/MMC4)
|
|
if (bChrLatch)
|
|
{
|
|
nes.mapper.PPU_ChrLatch((ushort)(tileadr));
|
|
}
|
|
|
|
if (++ntbl_x == 32)
|
|
{
|
|
ntbl_x = 0;
|
|
ntbladr ^= 0x41F;
|
|
attradr = 0x03C0 + ((ntbladr & 0x0380) >> 4);
|
|
pNTBL = MMU.PPU_MEM_BANK[ntbladr >> 10];
|
|
}
|
|
else
|
|
{
|
|
ntbladr++;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// With Extension Latch(For MMC5)
|
|
pScn = lpScanline + (8 - loopy_shift);
|
|
pBGw = 0;
|
|
|
|
int ntbladr = 0x2000 + (MMU.loopy_v & 0x0FFF);
|
|
int ntbl_x = ntbladr & 0x1F;
|
|
|
|
int cache_tile = unchecked((int)(0xFFFF0000));
|
|
byte cache_attr = 0xFF;
|
|
|
|
byte exattr = 0;
|
|
chr_h = chr_l = attr = 0;
|
|
|
|
for (int i = 0; i < 33; i++)
|
|
{
|
|
nes.mapper.PPU_ExtLatchX(i);
|
|
nes.mapper.PPU_ExtLatch((ushort)ntbladr, ref chr_l, ref chr_h, ref exattr);
|
|
attr = (byte)(exattr & 0x0C);
|
|
|
|
if (cache_tile != ((chr_h << 8) + chr_l) || cache_attr != attr)
|
|
{
|
|
cache_tile = ((chr_h << 8) + chr_l);
|
|
cache_attr = attr;
|
|
BGwrite[pBGw] = (byte)(chr_h | chr_l);
|
|
|
|
int pBGPAL = attr;
|
|
{
|
|
int c1 = ((chr_l >> 1) & 0x55) | (chr_h & 0xAA);
|
|
int c2 = (chr_l & 0x55) | ((chr_h << 1) & 0xAA);
|
|
lpScreen[pScn + 0] = MMU.BGPAL[pBGPAL + (c1 >> 6)];
|
|
lpScreen[pScn + 4] = MMU.BGPAL[pBGPAL + ((c1 >> 2) & 3)];
|
|
lpScreen[pScn + 1] = MMU.BGPAL[pBGPAL + (c2 >> 6)];
|
|
lpScreen[pScn + 5] = MMU.BGPAL[pBGPAL + ((c2 >> 2) & 3)];
|
|
lpScreen[pScn + 2] = MMU.BGPAL[pBGPAL + ((c1 >> 4) & 3)];
|
|
lpScreen[pScn + 6] = MMU.BGPAL[pBGPAL + (c1 & 3)];
|
|
lpScreen[pScn + 3] = MMU.BGPAL[pBGPAL + ((c2 >> 4) & 3)];
|
|
lpScreen[pScn + 7] = MMU.BGPAL[pBGPAL + (c2 & 3)];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
lpScreen[pScn + 0] = lpScreen[pScn - 8];
|
|
lpScreen[pScn + 0 + 1] = lpScreen[pScn - 8 + 1];
|
|
lpScreen[pScn + 0 + 2] = lpScreen[pScn - 8 + 2];
|
|
lpScreen[pScn + 0 + 3] = lpScreen[pScn - 8 + 3];
|
|
|
|
lpScreen[pScn + 4] = lpScreen[pScn - 4];
|
|
lpScreen[pScn + 4 + 1] = lpScreen[pScn - 4 + 1];
|
|
lpScreen[pScn + 4 + 2] = lpScreen[pScn - 4 + 2];
|
|
lpScreen[pScn + 4 + 3] = lpScreen[pScn - 4 + 3];
|
|
|
|
BGwrite[pBGw + 0] = BGwrite[pBGw - 1];
|
|
}
|
|
pScn += 8;
|
|
pBGw++;
|
|
|
|
if (++ntbl_x == 32)
|
|
{
|
|
ntbl_x = 0;
|
|
ntbladr ^= 0x41F;
|
|
}
|
|
else
|
|
{
|
|
ntbladr++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!bExtLatch)
|
|
{
|
|
// Without Extension Latch
|
|
if (!bExtNameTable)
|
|
{
|
|
pScn = lpScanline + (8 - loopy_shift);
|
|
pBGw = 0;
|
|
|
|
int ntbladr = 0x2000 + (MMU.loopy_v & 0x0FFF);
|
|
int attradr = 0x03C0 + ((MMU.loopy_v & 0x0380) >> 4);
|
|
int ntbl_x = ntbladr & 0x001F;
|
|
int attrsft = (ntbladr & 0x0040) >> 4;
|
|
var pNTBL = MMU.PPU_MEM_BANK[ntbladr >> 10];
|
|
|
|
int tileadr = 0;
|
|
int cache_tile = unchecked((int)(0xFFFF0000));
|
|
byte cache_attr = 0xFF;
|
|
|
|
chr_h = chr_l = attr = 0;
|
|
|
|
for (int i = 0; i < 33; i++)
|
|
{
|
|
tileadr = ((MMU.PPUREG[0] & PPU_BGTBL_BIT) << 8) + pNTBL[ntbladr & 0x03FF] * 0x10 + loopy_y;
|
|
|
|
if (i != 0)
|
|
{
|
|
nes.EmulationCPU(NES.FETCH_CYCLES * 4);
|
|
}
|
|
|
|
attr = (byte)(((pNTBL[attradr + (ntbl_x >> 2)] >> ((ntbl_x & 2) + attrsft)) & 3) << 2);
|
|
|
|
if (cache_tile != tileadr || cache_attr != attr)
|
|
{
|
|
cache_tile = tileadr;
|
|
cache_attr = attr;
|
|
|
|
chr_l = MMU.PPU_MEM_BANK[tileadr >> 10][tileadr & 0x03FF];
|
|
chr_h = MMU.PPU_MEM_BANK[tileadr >> 10][(tileadr & 0x03FF) + 8];
|
|
lpScreen[pBGw] = (byte)(chr_l | chr_h);
|
|
|
|
int pBGPAL = attr;
|
|
{
|
|
int c1 = ((chr_l >> 1) & 0x55) | (chr_h & 0xAA);
|
|
int c2 = (chr_l & 0x55) | ((chr_h << 1) & 0xAA);
|
|
lpScreen[pScn + 0] = MMU.BGPAL[pBGPAL + (c1 >> 6)];
|
|
lpScreen[pScn + 4] = MMU.BGPAL[pBGPAL + ((c1 >> 2) & 3)];
|
|
lpScreen[pScn + 1] = MMU.BGPAL[pBGPAL + ((c2 >> 6))];
|
|
lpScreen[pScn + 5] = MMU.BGPAL[pBGPAL + ((c2 >> 2) & 3)];
|
|
lpScreen[pScn + 2] = MMU.BGPAL[pBGPAL + ((c1 >> 4) & 3)];
|
|
lpScreen[pScn + 6] = MMU.BGPAL[pBGPAL + (c1 & 3)];
|
|
lpScreen[pScn + 3] = MMU.BGPAL[pBGPAL + ((c2 >> 4) & 3)];
|
|
lpScreen[pScn + 7] = MMU.BGPAL[pBGPAL + (c2 & 3)];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
lpScreen[pScn + 0] = lpScreen[pScn - 8];
|
|
lpScreen[pScn + 0 + 1] = lpScreen[pScn - 8 + 1];
|
|
lpScreen[pScn + 0 + 2] = lpScreen[pScn - 8 + 2];
|
|
lpScreen[pScn + 0 + 3] = lpScreen[pScn - 8 + 3];
|
|
|
|
lpScreen[pScn + 4] = lpScreen[pScn - 4];
|
|
lpScreen[pScn + 4 + 1] = lpScreen[pScn - 4 + 1];
|
|
lpScreen[pScn + 4 + 2] = lpScreen[pScn - 4 + 2];
|
|
lpScreen[pScn + 4 + 3] = lpScreen[pScn - 4 + 3];
|
|
|
|
BGwrite[pBGw + 0] = BGwrite[pBGw - 1];
|
|
}
|
|
pScn += 8;
|
|
pBGw++;
|
|
|
|
// Character latch(For MMC2/MMC4)
|
|
if (bChrLatch)
|
|
{
|
|
nes.mapper.PPU_ChrLatch((ushort)(tileadr));
|
|
}
|
|
|
|
if (++ntbl_x == 32)
|
|
{
|
|
ntbl_x = 0;
|
|
ntbladr ^= 0x41F;
|
|
attradr = 0x03C0 + ((ntbladr & 0x0380) >> 4);
|
|
pNTBL = MMU.PPU_MEM_BANK[ntbladr >> 10];
|
|
}
|
|
else
|
|
{
|
|
ntbladr++;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pScn = lpScanline + (8 - loopy_shift);
|
|
pBGw = 0;
|
|
|
|
int ntbladr;
|
|
int tileadr;
|
|
int cache_tile = unchecked((int)(0xFFFF0000));
|
|
byte cache_attr = 0xFF;
|
|
|
|
chr_h = chr_l = attr = 0;
|
|
|
|
ushort loopy_v_tmp = MMU.loopy_v;
|
|
|
|
for (int i = 0; i < 33; i++)
|
|
{
|
|
if (i != 0)
|
|
{
|
|
nes.EmulationCPU(NES.FETCH_CYCLES * 4);
|
|
}
|
|
|
|
ntbladr = 0x2000 + (MMU.loopy_v & 0x0FFF);
|
|
tileadr = ((MMU.PPUREG[0] & PPU_BGTBL_BIT) << 8) + MMU.PPU_MEM_BANK[ntbladr >> 10][ntbladr & 0x03FF] * 0x10 + ((MMU.loopy_v & 0x7000) >> 12);
|
|
attr = (byte)(((MMU.PPU_MEM_BANK[ntbladr >> 10][0x03C0 + ((ntbladr & 0x0380) >> 4) + ((ntbladr & 0x001C) >> 2)] >> (((ntbladr & 0x40) >> 4) + (ntbladr & 0x02))) & 3) << 2);
|
|
|
|
if (cache_tile != tileadr || cache_attr != attr)
|
|
{
|
|
cache_tile = tileadr;
|
|
cache_attr = attr;
|
|
|
|
chr_l = MMU.PPU_MEM_BANK[tileadr >> 10][tileadr & 0x03FF];
|
|
chr_h = MMU.PPU_MEM_BANK[tileadr >> 10][(tileadr & 0x03FF) + 8];
|
|
BGwrite[pBGw] = (byte)(chr_l | chr_h);
|
|
|
|
int pBGPAL = attr;
|
|
{
|
|
int c1 = ((chr_l >> 1) & 0x55) | (chr_h & 0xAA);
|
|
int c2 = (chr_l & 0x55) | ((chr_h << 1) & 0xAA);
|
|
lpScreen[pScn + 0] = MMU.BGPAL[pBGPAL + (c1 >> 6)];
|
|
lpScreen[pScn + 4] = MMU.BGPAL[pBGPAL + ((c1 >> 2) & 3)];
|
|
lpScreen[pScn + 1] = MMU.BGPAL[pBGPAL + (c2 >> 6)];
|
|
lpScreen[pScn + 5] = MMU.BGPAL[pBGPAL + ((c2 >> 2) & 3)];
|
|
lpScreen[pScn + 2] = MMU.BGPAL[pBGPAL + ((c1 >> 4) & 3)];
|
|
lpScreen[pScn + 6] = MMU.BGPAL[pBGPAL + (c1 & 3)];
|
|
lpScreen[pScn + 3] = MMU.BGPAL[pBGPAL + ((c2 >> 4) & 3)];
|
|
lpScreen[pScn + 7] = MMU.BGPAL[pBGPAL + (c2 & 3)];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
lpScreen[pScn + 0] = lpScreen[pScn - 8];
|
|
lpScreen[pScn + 0 + 1] = lpScreen[pScn - 8 + 1];
|
|
lpScreen[pScn + 0 + 2] = lpScreen[pScn - 8 + 2];
|
|
lpScreen[pScn + 0 + 3] = lpScreen[pScn - 8 + 3];
|
|
|
|
lpScreen[pScn + 4] = lpScreen[pScn - 4];
|
|
lpScreen[pScn + 4 + 1] = lpScreen[pScn - 4 + 1];
|
|
lpScreen[pScn + 4 + 2] = lpScreen[pScn - 4 + 2];
|
|
lpScreen[pScn + 4 + 3] = lpScreen[pScn - 4 + 3];
|
|
|
|
BGwrite[pBGw + 0] = BGwrite[pBGw - 1];
|
|
}
|
|
pScn += 8;
|
|
pBGw++;
|
|
|
|
// Character latch(For MMC2/MMC4)
|
|
if (bChrLatch)
|
|
{
|
|
nes.mapper.PPU_ChrLatch((ushort)tileadr);
|
|
}
|
|
|
|
if ((MMU.loopy_v & 0x1F) == 0x1F)
|
|
{
|
|
MMU.loopy_v ^= 0x041F;
|
|
}
|
|
else
|
|
{
|
|
MMU.loopy_v++;
|
|
}
|
|
}
|
|
MMU.loopy_v = loopy_v_tmp;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// With Extension Latch(For MMC5)
|
|
pScn = lpScanline + (8 - loopy_shift);
|
|
pBGw = 0;
|
|
|
|
int ntbladr = 0x2000 + (MMU.loopy_v & 0x0FFF);
|
|
int ntbl_x = ntbladr & 0x1F;
|
|
|
|
int cache_tile = unchecked((int)0xFFFF0000);
|
|
byte cache_attr = 0xFF;
|
|
|
|
byte exattr = 0;
|
|
chr_h = chr_l = attr = 0;
|
|
|
|
for (int i = 0; i < 33; i++)
|
|
{
|
|
if (i != 0)
|
|
{
|
|
nes.EmulationCPU(NES.FETCH_CYCLES * 4);
|
|
}
|
|
nes.mapper.PPU_ExtLatchX(i);
|
|
nes.mapper.PPU_ExtLatch((ushort)ntbladr, ref chr_l, ref chr_h, ref exattr);
|
|
attr = (byte)(exattr & 0x0C);
|
|
|
|
if (cache_tile != ((chr_h << 8) + chr_l) || cache_attr != attr)
|
|
{
|
|
cache_tile = ((chr_h << 8) + chr_l);
|
|
cache_attr = attr;
|
|
BGwrite[pBGw] = (byte)(chr_l | chr_h);
|
|
|
|
int pBGPAL = attr;
|
|
{
|
|
int c1 = ((chr_l >> 1) & 0x55) | (chr_h & 0xAA);
|
|
int c2 = (chr_l & 0x55) | ((chr_h << 1) & 0xAA);
|
|
lpScreen[pScn + 0] = MMU.BGPAL[pBGPAL + ((c1 >> 6))];
|
|
lpScreen[pScn + 4] = MMU.BGPAL[pBGPAL + ((c1 >> 2) & 3)];
|
|
lpScreen[pScn + 1] = MMU.BGPAL[pBGPAL + ((c2 >> 6))];
|
|
lpScreen[pScn + 5] = MMU.BGPAL[pBGPAL + ((c2 >> 2) & 3)];
|
|
lpScreen[pScn + 2] = MMU.BGPAL[pBGPAL + ((c1 >> 4) & 3)];
|
|
lpScreen[pScn + 6] = MMU.BGPAL[pBGPAL + (c1 & 3)];
|
|
lpScreen[pScn + 3] = MMU.BGPAL[pBGPAL + ((c2 >> 4) & 3)];
|
|
lpScreen[pScn + 7] = MMU.BGPAL[pBGPAL + (c2 & 3)];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
lpScreen[pScn + 0] = lpScreen[pScn - 8];
|
|
lpScreen[pScn + 0 + 1] = lpScreen[pScn - 8 + 1];
|
|
lpScreen[pScn + 0 + 2] = lpScreen[pScn - 8 + 2];
|
|
lpScreen[pScn + 0 + 3] = lpScreen[pScn - 8 + 3];
|
|
|
|
lpScreen[pScn + 4] = lpScreen[pScn - 4];
|
|
lpScreen[pScn + 4 + 1] = lpScreen[pScn - 4 + 1];
|
|
lpScreen[pScn + 4 + 2] = lpScreen[pScn - 4 + 2];
|
|
lpScreen[pScn + 4 + 3] = lpScreen[pScn - 4 + 3];
|
|
|
|
BGwrite[pBGw + 0] = BGwrite[pBGw - 1];
|
|
}
|
|
pScn += 8;
|
|
pBGw++;
|
|
|
|
if (++ntbl_x == 32)
|
|
{
|
|
ntbl_x = 0;
|
|
ntbladr ^= 0x41F;
|
|
}
|
|
else
|
|
{
|
|
ntbladr++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ((MMU.PPUREG[1] & PPU_BGCLIP_BIT) == 0 && bLeftClip)
|
|
{
|
|
pScn = lpScanline + 8;
|
|
for (int i = 0; i < 8; i++)
|
|
{
|
|
lpScreen[i] = MMU.BGPAL[0];
|
|
}
|
|
}
|
|
}
|
|
|
|
// Render sprites
|
|
var temp = ~PPU_SPMAX_FLAG;
|
|
MMU.PPUREG[2] = (byte)(MMU.PPUREG[2] & temp);
|
|
|
|
// 昞帵婜娫奜偱偁傟偽僉儍儞僙儖
|
|
if (scanline > 239)
|
|
return;
|
|
|
|
if ((MMU.PPUREG[1] & PPU_SPDISP_BIT) == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
int spmax = 0;
|
|
int spraddr = 0, sp_y = 0, sp_h = 0;
|
|
chr_h = chr_l = 0;
|
|
|
|
|
|
pBGw = 0;
|
|
int pSPw = 0;
|
|
int pBit2Rev = 0;
|
|
|
|
MemoryUtility.ZEROMEMORY(SPwrite, SPwrite.Length);
|
|
|
|
spmax = 0;
|
|
Sprite sp = new Sprite(MMU.SPRAM, 0);
|
|
sp_h = (MMU.PPUREG[0] & PPU_SP16_BIT) != 0 ? 15 : 7;
|
|
|
|
// Left clip
|
|
if (bLeftClip && ((MMU.PPUREG[1] & PPU_SPCLIP_BIT) == 0))
|
|
{
|
|
SPwrite[0] = 0xFF;
|
|
}
|
|
|
|
for (int i = 0; i < 64; i++, sp.AddOffset(1))
|
|
{
|
|
sp_y = scanline - (sp.y + 1);
|
|
// 僗僉儍儞儔僀儞撪偵SPRITE偑懚嵼偡傞偐傪僠僃僢僋
|
|
if (sp_y != (sp_y & sp_h))
|
|
continue;
|
|
|
|
if ((MMU.PPUREG[0] & PPU_SP16_BIT) == 0)
|
|
{
|
|
// 8x8 Sprite
|
|
spraddr = ((MMU.PPUREG[0] & PPU_SPTBL_BIT) << 9) + (sp.tile << 4);
|
|
if ((sp.attr & SP_VMIRROR_BIT) == 0)
|
|
spraddr += sp_y;
|
|
else
|
|
spraddr += 7 - sp_y;
|
|
}
|
|
else
|
|
{
|
|
// 8x16 Sprite
|
|
spraddr = ((sp.tile & 1) << 12) + ((sp.tile & 0xFE) << 4);
|
|
if ((sp.attr & SP_VMIRROR_BIT) == 0)
|
|
spraddr += ((sp_y & 8) << 1) + (sp_y & 7);
|
|
else
|
|
spraddr += ((~sp_y & 8) << 1) + (7 - (sp_y & 7));
|
|
}
|
|
// Character pattern
|
|
chr_l = MMU.PPU_MEM_BANK[spraddr >> 10][spraddr & 0x3FF];
|
|
chr_h = MMU.PPU_MEM_BANK[spraddr >> 10][(spraddr & 0x3FF) + 8];
|
|
|
|
// Character latch(For MMC2/MMC4)
|
|
if (bChrLatch)
|
|
{
|
|
nes.mapper.PPU_ChrLatch((ushort)spraddr);
|
|
}
|
|
|
|
// pattern mask
|
|
if ((sp.attr & SP_HMIRROR_BIT) != 0)
|
|
{
|
|
chr_l = Bit2Rev[pBit2Rev + chr_l];
|
|
chr_h = Bit2Rev[pBit2Rev + chr_h];
|
|
}
|
|
byte SPpat = (byte)(chr_l | chr_h);
|
|
|
|
// Sprite hitcheck
|
|
if (i == 0 && (MMU.PPUREG[2] & PPU_SPHIT_FLAG) == 0)
|
|
{
|
|
int BGpos = ((sp.x & 0xF8) + ((loopy_shift + (sp.x & 7)) & 8)) >> 3;
|
|
int BGsft = 8 - ((loopy_shift + sp.x) & 7);
|
|
|
|
var temp1 = BGwrite[pBGw + BGpos + 0] << 8;
|
|
var temp2 = BGwrite[pBGw + BGpos + 1];
|
|
byte BGmsk = (byte)((temp1 | temp2) >> BGsft);
|
|
|
|
if ((SPpat & BGmsk) != 0)
|
|
{
|
|
MMU.PPUREG[2] |= PPU_SPHIT_FLAG;
|
|
}
|
|
}
|
|
|
|
// Sprite mask
|
|
int SPpos = sp.x / 8;
|
|
int SPsft = 8 - (sp.x & 7);
|
|
byte SPmsk = (byte)((SPwrite[pSPw + SPpos + 0] << 8 | SPwrite[pSPw + SPpos + 1]) >> SPsft);
|
|
ushort SPwrt = (ushort)(SPpat << SPsft);
|
|
SPwrite[pSPw + SPpos + 0] = (byte)(SPwrite[pSPw + SPpos + 0] | SPwrt >> 8);
|
|
SPwrite[pSPw + SPpos + 1] = (byte)(SPwrite[pSPw + SPpos + 1] | SPwrt & 0xFF);
|
|
SPpat = (byte)(SPpat & ~SPmsk);
|
|
|
|
if ((sp.attr & SP_PRIORITY_BIT) != 0)
|
|
{
|
|
// BG > SP priority
|
|
int BGpos = ((sp.x & 0xF8) + ((loopy_shift + (sp.x & 7)) & 8)) >> 3;
|
|
int BGsft = 8 - ((loopy_shift + sp.x) & 7);
|
|
byte BGmsk = (byte)(((BGwrite[pBGw + BGpos + 0] << 8) | BGwrite[pBGw + BGpos + 1]) >> BGsft);
|
|
|
|
SPpat = (byte)(SPpat & ~BGmsk);
|
|
}
|
|
|
|
// Attribute
|
|
int pSPPAL = (sp.attr & SP_COLOR_BIT) << 2;
|
|
// Ptr
|
|
pScn = lpScanline + sp.x + 8;
|
|
|
|
if (!bExtMono)
|
|
{
|
|
int c1 = ((chr_l >> 1) & 0x55) | (chr_h & 0xAA);
|
|
int c2 = (chr_l & 0x55) | ((chr_h << 1) & 0xAA);
|
|
if ((SPpat & 0x80) != 0) lpScreen[pScn + 0] = MMU.SPPAL[pSPPAL + (c1 >> 6)];
|
|
if ((SPpat & 0x08) != 0) lpScreen[pScn + 4] = MMU.SPPAL[pSPPAL + ((c1 >> 2) & 3)];
|
|
if ((SPpat & 0x40) != 0) lpScreen[pScn + 1] = MMU.SPPAL[pSPPAL + ((c2 >> 6))];
|
|
if ((SPpat & 0x04) != 0) lpScreen[pScn + 5] = MMU.SPPAL[pSPPAL + ((c2 >> 2) & 3)];
|
|
if ((SPpat & 0x20) != 0) lpScreen[pScn + 2] = MMU.SPPAL[pSPPAL + ((c1 >> 4) & 3)];
|
|
if ((SPpat & 0x02) != 0) lpScreen[pScn + 6] = MMU.SPPAL[pSPPAL + (c1 & 3)];
|
|
if ((SPpat & 0x10) != 0) lpScreen[pScn + 3] = MMU.SPPAL[pSPPAL + ((c2 >> 4) & 3)];
|
|
if ((SPpat & 0x01) != 0) lpScreen[pScn + 7] = MMU.SPPAL[pSPPAL + (c2 & 3)];
|
|
}
|
|
else
|
|
{
|
|
// Monocrome effect (for Final Fantasy)
|
|
byte mono = BGmono[((sp.x & 0xF8) + ((loopy_shift + (sp.x & 7)) & 8)) >> 3];
|
|
|
|
int c1 = ((chr_l >> 1) & 0x55) | (chr_h & 0xAA);
|
|
int c2 = (chr_l & 0x55) | ((chr_h << 1) & 0xAA);
|
|
if ((SPpat & 0x80) != 0) lpScreen[pScn + 0] = (byte)(MMU.SPPAL[pSPPAL + (c1 >> 6)] | mono);
|
|
if ((SPpat & 0x08) != 0) lpScreen[pScn + 4] = (byte)(MMU.SPPAL[pSPPAL + ((c1 >> 2) & 3)] | mono);
|
|
if ((SPpat & 0x40) != 0) lpScreen[pScn + 1] = (byte)(MMU.SPPAL[pSPPAL + (c2 >> 6)] | mono);
|
|
if ((SPpat & 0x04) != 0) lpScreen[pScn + 5] = (byte)(MMU.SPPAL[pSPPAL + ((c2 >> 2) & 3)] | mono);
|
|
if ((SPpat & 0x20) != 0) lpScreen[pScn + 2] = (byte)(MMU.SPPAL[pSPPAL + ((c1 >> 4) & 3)] | mono);
|
|
if ((SPpat & 0x02) != 0) lpScreen[pScn + 6] = (byte)(MMU.SPPAL[pSPPAL + (c1 & 3)] | mono);
|
|
if ((SPpat & 0x10) != 0) lpScreen[pScn + 3] = (byte)(MMU.SPPAL[pSPPAL + ((c2 >> 4) & 3)] | mono);
|
|
if ((SPpat & 0x01) != 0) lpScreen[pScn + 7] = (byte)(MMU.SPPAL[pSPPAL + (c2 & 3)] | mono);
|
|
}
|
|
|
|
if (++spmax > 8 - 1)
|
|
{
|
|
if (!bMax)
|
|
break;
|
|
}
|
|
}
|
|
if (spmax > 8 - 1)
|
|
{
|
|
MMU.PPUREG[2] |= PPU_SPMAX_FLAG;
|
|
}
|
|
}
|
|
|
|
internal bool IsSprite0(int scanline)
|
|
{
|
|
// 僗僾儔僀僩orBG旕昞帵偼僉儍儞僙儖(僸僢僩偟側偄)
|
|
if ((MMU.PPUREG[1] & (PPU_SPDISP_BIT | PPU_BGDISP_BIT)) != (PPU_SPDISP_BIT | PPU_BGDISP_BIT))
|
|
return false;
|
|
|
|
// 婛偵僸僢僩偟偰偄偨傜僉儍儞僙儖
|
|
if ((MMU.PPUREG[2] & PPU_SPHIT_FLAG) != 0)
|
|
return false;
|
|
|
|
if ((MMU.PPUREG[0] & PPU_SP16_BIT) == 0)
|
|
{
|
|
// 8x8
|
|
if ((scanline < MMU.SPRAM[0] + 1) || (scanline > (MMU.SPRAM[0] + 7 + 1)))
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
// 8x16
|
|
if ((scanline < MMU.SPRAM[0] + 1) || (scanline > (MMU.SPRAM[0] + 15 + 1)))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
internal void DummyScanline(int scanline)
|
|
{
|
|
int i;
|
|
int spmax;
|
|
int sp_h;
|
|
|
|
MMU.PPUREG[2] = (byte)(MMU.PPUREG[2] & ~PPU_SPMAX_FLAG);
|
|
|
|
// 僗僾儔僀僩旕昞帵偼僉儍儞僙儖
|
|
if ((MMU.PPUREG[1] & PPU_SPDISP_BIT) == 0)
|
|
return;
|
|
|
|
// 昞帵婜娫奜偱偁傟偽僉儍儞僙儖
|
|
if (scanline < 0 || scanline > 239)
|
|
return;
|
|
|
|
Sprite sp = new Sprite(MMU.SPRAM, 0);
|
|
sp_h = (MMU.PPUREG[0] & PPU_SP16_BIT) != 0 ? 15 : 7;
|
|
|
|
spmax = 0;
|
|
// Sprite Max check
|
|
for (i = 0; i < 64; i++, sp.AddOffset(1))
|
|
{
|
|
// 僗僉儍儞儔僀儞撪偵SPRITE偑懚嵼偡傞偐傪僠僃僢僋
|
|
if ((scanline < sp.y + 1) || (scanline > (sp.y + sp_h + 1)))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (++spmax > 8 - 1)
|
|
{
|
|
MMU.PPUREG[2] |= PPU_SPMAX_FLAG;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
internal void VBlankEnd()
|
|
{
|
|
MMU.PPUREG[2] = (byte)(MMU.PPUREG[2] & ~PPU_VBLANK_FLAG);
|
|
// VBlank扙弌帪偵僋儕傾偝傟傞
|
|
// 僄僉僒僀僩僶僀僋偱廳梫
|
|
MMU.PPUREG[2] = (byte)(MMU.PPUREG[2] & ~PPU_SPHIT_FLAG);
|
|
}
|
|
|
|
internal void VBlankStart()
|
|
{
|
|
MMU.PPUREG[2] |= PPU_VBLANK_FLAG;
|
|
}
|
|
|
|
public uint[] GetScreenPtr()
|
|
{
|
|
return lpScreen;
|
|
}
|
|
|
|
public byte[] GetLineColorMode()
|
|
{
|
|
return lpColormode;
|
|
}
|
|
|
|
internal void SetScreenPtr(uint[] screenBuffer, byte[] colormode)
|
|
{
|
|
lpScreen = screenBuffer;
|
|
lpColormode = colormode;
|
|
}
|
|
|
|
|
|
internal bool IsDispON()
|
|
{
|
|
return (MMU.PPUREG[1] & (PPU_BGDISP_BIT | PPU_SPDISP_BIT)) != 0;
|
|
}
|
|
|
|
internal void SetExtLatchMode(bool bMode)
|
|
{
|
|
bExtLatch = bMode;
|
|
}
|
|
|
|
internal ushort GetPPUADDR()
|
|
{
|
|
return MMU.loopy_v;
|
|
}
|
|
|
|
internal ushort GetTILEY()
|
|
{
|
|
return loopy_y;
|
|
}
|
|
|
|
internal void SetChrLatchMode(bool bMode)
|
|
{
|
|
bChrLatch = bMode;
|
|
}
|
|
|
|
internal void SetExtNameTableMode(bool bMode)
|
|
{
|
|
bExtNameTable = bMode;
|
|
}
|
|
|
|
internal void SetExtMonoMode(bool bMode)
|
|
{
|
|
bExtMono = bMode;
|
|
}
|
|
|
|
internal int GetScanlineNo()
|
|
{
|
|
return ScanlineNo;
|
|
}
|
|
|
|
public struct Sprite
|
|
{
|
|
public byte y
|
|
{
|
|
get => raw[offset + 0];
|
|
set => raw[offset + 0] = value;
|
|
}
|
|
|
|
public byte tile
|
|
{
|
|
get => raw[offset + 1];
|
|
set => raw[offset + 1] = value;
|
|
}
|
|
public byte attr
|
|
{
|
|
get => raw[offset + 2];
|
|
set => raw[offset + 2] = value;
|
|
}
|
|
public byte x
|
|
{
|
|
get => raw[offset + 3];
|
|
set => raw[offset + 3] = value;
|
|
}
|
|
|
|
private byte[] raw;
|
|
private int offset;
|
|
|
|
public Sprite(byte[] raw, int offset)
|
|
{
|
|
this.raw = raw;
|
|
this.offset = offset * 4;
|
|
}
|
|
|
|
public void AddOffset(int offset)
|
|
{
|
|
this.offset += offset * 4;
|
|
}
|
|
}
|
|
}
|
|
}
|