/// <summary>
/// Sends the packet.
/// </summary>
/// <param name="data">The data.</param>
/// <returns></returns>
public bool SendPacket(byte[] data)
{
uint txd = nextTXDesc++;
if (nextTXDesc >= 16)
{
nextTXDesc = 0;
}
uint offset = txd * 4;
// check if (oldest) descriptor is available (Bit 31/OWN = 0 available)
if ((txDescriptor.Read32(offset + 1) & 0x80000000) == 0)
{
for (uint i = 0; i < data.Length; i++)
{
buffers.Write8((txd * bufferSize) + i, data[i]);
}
ushort length = (ushort)(~data.Length);
length++;
// Set bits 31/OWN, 25/STP (start of packet), 24/ENP (end of packet) and two's compliment of the buffer length
txDescriptor.Write32(offset + 1, (length & (uint)(0x0FFF)) | (uint)(0x8300F000));
return(true);
}
return(false);
}
/// <summary>
/// Writes the pixel.
/// </summary>
/// <param name="colorIndex">Index of the color.</param>
/// <param name="x">The x.</param>
/// <param name="y">The y.</param>
public void WritePixel(byte colorIndex, ushort x, ushort y)
{
if (writeMethod == WriteMethod.Pixel8)
{
memory.Write8((uint)(y * 320 + x), colorIndex);
}
if (writeMethod == WriteMethod.Pixel2)
{ // ???
uint address = (uint)(y * 320 + x / 2);
colorIndex = (byte)(colorIndex & 0xF);
if ((x & 0x01) == 0)
{
memory.Write8(address & 0xF, (byte)(colorIndex << 4));
}
else
{
memory.Write8(address & 0x0F, colorIndex);
}
}
// TODO: Support more video modes
}