private protected VideoMode(int width, int height, VideoMode baseMode)
{
this.Width = width;
this.Height = height;
this.BitsPerPixel = baseMode.BitsPerPixel;
this.IsPlanar = baseMode.IsPlanar;
this.FontHeight = baseMode.FontHeight;
this.VideoModeType = baseMode.VideoModeType;
this.dac = baseMode.dac;
this.crtController = baseMode.crtController;
this.attributeController = baseMode.attributeController;
this.VideoRam = baseMode.VideoRam;
}
public byte ReadByte(int port)
{
switch (port)
{
case Ports.DacAddressReadMode:
return(Dac.ReadIndex);
case Ports.DacAddressWriteMode:
return(Dac.WriteIndex);
case Ports.DacData:
return(Dac.Read());
case Ports.GraphicsControllerAddress:
return((byte)graphicsRegister);
case Ports.GraphicsControllerData:
return(Graphics.ReadRegister(graphicsRegister));
case Ports.SequencerAddress:
return((byte)sequencerRegister);
case Ports.SequencerData:
return(Sequencer.ReadRegister(sequencerRegister));
case Ports.AttributeAddress:
return((byte)attributeRegister);
case Ports.AttributeData:
return(AttributeController.ReadRegister(attributeRegister));
case Ports.CrtControllerAddress:
case Ports.CrtControllerAddressAlt:
return((byte)crtRegister);
case Ports.CrtControllerData:
case Ports.CrtControllerDataAlt:
return(CrtController.ReadRegister(crtRegister));
case Ports.InputStatus1Read:
case Ports.InputStatus1ReadAlt:
attributeDataMode = false;
return(GetInputStatus1Value());
default:
return(0);
}
}
private protected VideoMode(int width, int height, int bpp, bool planar, int fontHeight, VideoModeType modeType, VideoHandler video)
{
this.Width = width;
this.Height = height;
this.OriginalHeight = height;
this.BitsPerPixel = bpp;
this.IsPlanar = planar;
this.FontHeight = fontHeight;
this.VideoModeType = modeType;
this.dac = video.Dac;
this.crtController = video.CrtController;
this.attributeController = video.AttributeController;
this.VideoRam = GetVideoRamPointer(video);
InitializeFont(video.VirtualMachine.PhysicalMemory);
}
public void WriteByte(int port, byte value)
{
switch (port)
{
case Ports.DacAddressReadMode:
Dac.ReadIndex = value;
break;
case Ports.DacAddressWriteMode:
Dac.WriteIndex = value;
break;
case Ports.DacData:
Dac.Write(value);
break;
case Ports.GraphicsControllerAddress:
graphicsRegister = (GraphicsRegister)value;
break;
case Ports.GraphicsControllerData:
Graphics.WriteRegister(graphicsRegister, value);
break;
case Ports.SequencerAddress:
sequencerRegister = (SequencerRegister)value;
break;
case Ports.SequencerData:
var previousMode = Sequencer.SequencerMemoryMode;
Sequencer.WriteRegister(sequencerRegister, value);
if ((previousMode & SequencerMemoryMode.Chain4) == SequencerMemoryMode.Chain4 && (Sequencer.SequencerMemoryMode & SequencerMemoryMode.Chain4) == 0)
{
EnterModeX();
}
break;
case Ports.AttributeAddress:
if (!attributeDataMode)
{
attributeRegister = (AttributeControllerRegister)(value & 0x1F);
}
else
{
AttributeController.WriteRegister(attributeRegister, value);
}
attributeDataMode = !attributeDataMode;
break;
case Ports.AttributeData:
AttributeController.WriteRegister(attributeRegister, value);
break;
case Ports.CrtControllerAddress:
case Ports.CrtControllerAddressAlt:
crtRegister = (CrtControllerRegister)value;
break;
case Ports.CrtControllerData:
case Ports.CrtControllerDataAlt:
int previousVerticalEnd = CrtController.VerticalDisplayEnd;
CrtController.WriteRegister(crtRegister, value);
if (previousVerticalEnd != CrtController.VerticalDisplayEnd)
{
ChangeVerticalEnd();
}
break;
}
}