/// <summary>
/// Initializes a new instance of the TextConsole class.
/// </summary>
/// <param name="video">Current VideoHandler instance.</param>
/// <param name="bios">Current Bios instance.</param>
public TextConsole(VideoHandler video, Bios bios)
{
unsafe
{
displayData = (ushort *)video.VideoRam.ToPointer();
}
this.video = video;
this.bios = bios;
this.AnsiEnabled = true;
Width = 80;
Height = 25;
ForegroundColor = 7;
}
/// <summary>
/// Performs any necessary initialization upon entering the video mode.
/// </summary>
/// <param name="video">The video device.</param>
internal virtual void InitializeMode(VideoHandler video)
{
video.VirtualMachine.PhysicalMemory.Bios.CharacterPointHeight = (ushort)this.FontHeight;
unsafe
{
byte *ptr = (byte *)VideoRam.ToPointer();
for (int i = 0; i < VideoHandler.TotalVramBytes; i++)
{
ptr[i] = 0;
}
}
int stride;
if (this.VideoModeType == VideoModeType.Text)
{
video.TextConsole.Width = this.Width;
video.TextConsole.Height = this.Height;
stride = this.Width * 2;
}
else
{
video.TextConsole.Width = this.Width / 8;
video.TextConsole.Height = this.Height / this.FontHeight;
if (this.BitsPerPixel < 8)
{
stride = this.Width / 8;
}
else
{
stride = this.Width;
}
}
crtController.Overflow = (1 << 4);
crtController.MaximumScanLine = (1 << 6);
crtController.LineCompare = 0xFF;
crtController.Offset = (byte)(stride / 2u);
crtController.StartAddress = 0;
video.Graphics.BitMask = 0xFF;
}
/// <summary> /// Returns a pointer to video RAM for the display mode. /// </summary> /// <param name="video">Current VideoHandler instance.</param> /// <returns>Pointer to the mode's video RAM.</returns> internal virtual IntPtr GetVideoRamPointer(VideoHandler video) => video.VideoRam;
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);
}
