public void CheckVideoRamReadReturnsWritten()
{
var ram = new VideoRam(null, 0, 0x0000, 0x100);
ram.Write(0x0001, 0x59);
Assert.AreEqual(0x59, ram.Read(0x0001));
}
/// <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;
}
public void CheckCanReadVideoRam()
{
var ram = new VideoRam(null, 0, 0x0000, 0x100);
Assert.IsTrue(ram.CanRead);
}
