/// <summary>
/// Initialize a set of PPU registers with the given segment of the Game Boy's
/// memory map starting at the PPU I/O register address $FF40.
/// </summary>
/// <remarks>The 7th byte, corresponding to the DMACONT register, is ignored.</remarks>
public PPURegisters(ArraySegment <byte> registerValues)
{
if (registerValues.Count < 12)
{
throw new ArgumentException($"Expected 12 bytes of PPU I/O registers but only got {registerValues.Count}.", nameof(registerValues));
}
LCDControl = new LCDControlRegister()
{
Data = registerValues[0]
};
LCDStatus = new LCDStatusRegister()
{
Data = registerValues[1]
};
ScrollY = registerValues[2];
ScrollX = registerValues[3];
CurrentScanline = registerValues[4];
CompareScanline = registerValues[5];
BackgroundPalette = new Palette()
{
Data = registerValues[7]
};
SpritePalette0 = new Palette()
{
Data = registerValues[8]
};
SpritePalette1 = new Palette()
{
Data = registerValues[9]
};
WindowY = registerValues[10];
WindowX = registerValues[11];
}
} //$ff4b, http://bgb.bircd.org/pandocs.htm#lcdpositionandscrolling
/// <summary>
/// Initialize a set of PPU registers with the given values.
/// </summary>
/// <param name="lcdc">The contents of the LCD Control register ($FF40)</param>
/// <param name="lcdstat">The contents of the LCD Status register ($FF41)</param>
/// <param name="scrollY">The contents of the SCY register ($FF42)</param>
/// <param name="scrollX">The contents of the SCX register ($FF43)</param>
/// <param name="currentScanline">The contents of the CURLINE register ($FF44)</param>
/// <param name="compareScanline">The contents of the CMPLINE register ($FF45)</param>
/// <param name="bgPalette">The contents of the Background Palette register ($FF47)</param>
/// <param name="spritePalette0">The contents of the Object Palette 0 register ($FF48)</param>
/// <param name="spritePalette1">The contents of the Object Palette 1 register ($FF49)</param>
/// <param name="windowY">The contents of the WY register ($FF4A)</param>
/// <param name="windowX">The contents of the WX register ($FF4B)</param>
/// <remarks>DMACONT register ($FF46) elided due to being write-only.</remarks>
public PPURegisters(byte lcdc = 0, byte lcdstat = 0, byte scrollY = 0, byte scrollX = 0, byte currentScanline = 0, byte compareScanline = 0,
byte bgPalette = 0, byte spritePalette0 = 0, byte spritePalette1 = 0, byte windowY = 0, byte windowX = 0)
{
LCDControl = new LCDControlRegister()
{
Data = lcdc
};
LCDStatus = new LCDStatusRegister()
{
Data = lcdstat
};
ScrollY = scrollY;
ScrollX = scrollX;
CurrentScanline = currentScanline;
CompareScanline = compareScanline;
BackgroundPalette = new Palette()
{
Data = bgPalette
};
SpritePalette0 = new Palette()
{
Data = spritePalette0
};
SpritePalette1 = new Palette()
{
Data = spritePalette1
};
WindowY = windowY;
WindowX = windowX;
}