private void NameTableView_MouseMove(object sender, MouseEventArgs e)
{
int TileX, TileY, NameTable;
if (NameTableView.Which == NameTableViewer.WhichNametable.NT_ALL)
{
TileX = e.X / 8;
TileY = e.Y / 8;
NameTable = (TileX / 32) + ((TileY / 30) * 2);
}
else
{
switch (NameTableView.Which)
{
default:
case NameTableViewer.WhichNametable.NT_2000:
NameTable = 0;
break;
case NameTableViewer.WhichNametable.NT_2400:
NameTable = 1;
break;
case NameTableViewer.WhichNametable.NT_2800:
NameTable = 2;
break;
case NameTableViewer.WhichNametable.NT_2C00:
NameTable = 3;
break;
}
TileX = e.X / 16;
TileY = e.Y / 16;
}
XYLabel.Text = TileX + " : " + TileY;
int PPUAddress = 0x2000 + (NameTable * 0x400) + ((TileY % 30) * 32) + (TileX % 32);
PPUAddressLabel.Text = string.Format("{0:X4}", PPUAddress);
int TileID = _ppu.PeekPPU(PPUAddress);
TileIDLabel.Text = string.Format("{0:X2}", TileID);
TableLabel.Text = NameTable.ToString();
int ytable = 0, yline = 0;
if (e.Y >= 240)
{
ytable += 2;
yline = 240;
}
int table = (e.X >> 8) + ytable;
int ntaddr = (table << 10);
int px = e.X & 255;
int py = e.Y - yline;
int tx = px >> 3;
int ty = py >> 3;
int atbyte_ptr = ntaddr + 0x3C0 + ((ty >> 2) << 3) + (tx >> 2);
int at = _ppu.PeekPPU(atbyte_ptr + 0x2000);
if ((ty & 2) != 0)
{
at >>= 4;
}
if ((tx & 2) != 0)
{
at >>= 2;
}
at &= 0x03;
PaletteLabel.Text = at.ToString();
}
