Ok.

Well, I've runned my emu for the first time. Render algorithm seems to work fine, but there's a problem: it shows a 32x30 grid of the same tile, tile #0 to be exact. And it does nothing else. I've added some code to change Name Table values while pressing a key, and it works, it changes the displayed tile. I supose this problem has something to do with ports 2006 & 2007. I hadn't implemented them, so in order to run the emu I've coded the handler like this:

// 0x2006 - VRAM Address Register #2 (W2)
case 0x2006:
{
CPU_Cont.Mem_Map[ 0x2006 ] = byte;
if( PPU_Cont.VRAM_Byte_Selector )
{
PPU_Cont.Temp_Address &= 0xFF;
PPU_Cont.Temp_Address |= (byte<<8);
PPU_Cont.VRAM_Byte_Selector=0;
}
else
{
PPU_Cont.Temp_Address &= 0xFF00;
PPU_Cont.Temp_Address |= byte;
PPU_Cont.VRAM_Byte_Selector=1;
}
break;
}
// 0x2007 - VRAM I/O Register (RW)
case 0x2007:
{
PPU_Cont.Mem_Map[ PPU_Cont.Temp_Address ] = byte;
if( CPU_Cont.Mem_Map[ 0x2000 ] & 0x4 )
PPU_Cont.Temp_Address += 32;
else
PPU_Cont.Temp_Address += 1;
break;
}

I know that's not the best implementation, it's just for testing my emu functionality. Any idea on what the problem can be about?