/// <summary>
/// Retrieves the packets.
/// </summary>
protected void RetrievePackets()
{
// Check all descriptors
for (uint rxd = 0; rxd < 16; rxd++)
{
uint offset = rxd * 4;
uint status = rxDescriptor.Read32(offset + 1);
// Check is 31/OWN bit is not set
if ((status & 0x80000000) == 0)
{
ushort length = (ushort)(rxDescriptor.Read16(offset + 0) & 0xFFF);
var data = new byte[length];
for (uint i = 0; i < data.Length; i++)
{
data[i] = buffers.Read8((rxd * bufferSize) + i);
}
// if queue fails because it is already full, the packet is discarded
packetBuffer.QueuePacketForStack(data);
// Clear 31/OWN bit
rxDescriptor.Write32(offset + 1, status | 0x80000000);
}
}
}
/// <summary>
/// Reads the pixel.
/// </summary>
/// <param name="x">The x.</param>
/// <param name="y">The y.</param>
/// <returns></returns>
public byte ReadPixel(ushort x, ushort y)
{
if (writeMethod == WriteMethod.Pixel8)
{
return(memory.Read8((uint)(y * 320 + x)));
}
// TODO: Support more video modes
return(0);
}