nespaste

private int inrange(int y){
		if((scanline+1)-(y)>=0)
			return (scanline+1)-y;
		else
			return 9;
	}
	boolean dodebug;
	private int stage = 1;
	private int n,m = 0;
	int spritec = 0;
	int c3=0;
	boolean spriteeven=false;
	boolean cont = false;
	void spriteEvaluation(){
		if(pcycle>=1 &&pcycle<=64){
			if(pcycle==1){
				Arrays.fill(oambuffer,(byte) 0xff);
				oamsignal = true;
			}

		}
		else if(pcycle>=65 &&pcycle<=256){
			oamsignal = false;
			int y = 0;
			switch(stage){//1
			case 1:
				//System.out.println("in stage 1: " +inrange(y));
				y=Byte.toUnsignedInt(map.ppureadoam(4*n));
				oambuffer[4*oamBCounter]=map.ppureadoam(4*n);
				if(inrange(y)<8&&y<241){
					oambuffer[4*oamBCounter+1]=map.ppureadoam(4*n+1);
					oambuffer[4*oamBCounter+2]=map.ppureadoam(4*n+2);
					oambuffer[4*oamBCounter+3]=map.ppureadoam(4*n+3);
					oamBCounter++;
					if(n==0){
						//spritezerohit= true;
					}
				}

				stage = 2;
				break;
			case 2: //2
				//System.out.println("in stage 2");
				if(n==63){
					n =0;
					cont = true;
				}
				else
					n++;
				if(cont){
					stage = 4;
				}
				else if(oamBCounter<8){
					stage = 1;
				}
				else if(oamBCounter ==8){
					//disable writes
					m=0;
					c3=0;
					stage = 3;
				}

				break;
			case 3: //3
				//System.out.println("in stage 3");
				y = Byte.toUnsignedInt(map.ppureadoam((4*n+m)));
				if(inrange(y)<8){
					PPUSTATUS_so = true;
					if(m==3){
						n++;
						m=0;
						c3++;
					}
					else{
						m++;
						c3++;
					}
				}
				else{
					if(n==63){
						stage = 4;
						n = 0;
						m = 0;
						c3++;
					}
					else{
						n++;
						c3++;
						if(m==3)
							m=0;
						else
							m++;
					}
				}

				break;
			case 4: //4
				//System.out.println("in stage 4");

				//do nothing forever
				oamBCounter=0;
				break;
			default: break;
			}
		}
		else if(pcycle>=257&&pcycle<=320){
			if(pcycle==257){
				oamBCounter=0;
			}
			switch((pcycle)%8){
			case 0:
				oamBCounter++;
				spritec++;
				break;
			case 1:
				spriteco[spritec] = Byte.toUnsignedInt(oambuffer[4*oamBCounter+3]);
				//spritela[spritec] = oambuffer[4*oamBCounter+2];
				byte b = oambuffer[4*oamBCounter+2];
				spritepalette[spritec] = b&3;
				spritepriority[spritec] = (b&32)>0?true:false;
				int y = inrange(oambuffer[4*oamBCounter]);
				int tileindex;
				if((b&0x80)!=0){
					tileindex = (Byte.toUnsignedInt(oambuffer[4*oamBCounter+1])<<4)+(8-y);
				}
				else
					tileindex = (Byte.toUnsignedInt(oambuffer[4*oamBCounter+1])<<4)+y;
				tileindex+= PPUCTRL_spta?0x1000:0;
				//int y = inrange(oambuffer[4*oamBCounter]);
				//int tileindex = (Byte.toUnsignedInt(oambuffer[4*oamBCounter+1])<<4)+y;
				//if((mem.read(0x2000)&0b1000)!=0)
				//	tileindex+=0x1000;
				//System.out.println("Tile index of sprite "+oamBCounter+": "+Integer.toHexString(tileindex));
				/*if((b&0x40)!=0){
					byte z = map.ppuread(tileindex);
					byte flip = 0;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;
					x = flip<<8;
					z = map.ppuread(tileindex+8);
					flip=0;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;z>>>=1;flip<<=1;
					flip|=z&1;
					flip<<=1;
					x|=flip;
					spritebm[spritec]=x;
				}
				else*/
					spritebm[spritec] = (Byte.toUnsignedInt((map.ppuread(tileindex)))<<8)|Byte.toUnsignedInt((map.ppuread(tileindex+8)));

				//int x = Integer.reverse(Byte.toUnsignedInt(map.ppuread(tileindex)))>>>24;
				//spritebm[spritec] = (x<<8)|(Integer.reverse(Byte.toUnsignedInt(map.ppuread(tileindex+8)))>>>24);
				break;
			default: break;
			}
		}
		else{
			stage=1;
			n = 0;
			m =0;
			cont=false;
			oamBCounter=0;
			spritec=0;
		}
		if(dodebug){
		try {
			System.in.read();

			System.out.println("v: "+Integer.toHexString(v)
					+" yfine: "+ (v>>12)
					+" scanline: "+scanline
					+" pcycle: "+pcycle
					+" n: "+n
					+" Sprites found: "+oamBCounter);
			//debugSprites();
			System.out.println(Arrays.toString(oambuffer));
			System.out.println(Arrays.toString(map.ppu_oam));
		//	mem.printMemoryoam();
			//cpu.debug();
		} catch (IOException e) {
			e.printStackTrace();
		}
		}
	}

}