private void ReceiveFrameInner(EthernetFrame frame)
{
if ((registers.Control & (1u << 1)) == 0)
{
//if receiving is disabled discard packet
return;
}
var rd = new receiveDescriptor(machine.SystemBus);
if (!EthernetFrame.CheckCRC(frame.Bytes))
{
rd.CRCError = true;
this.Log(LogLevel.Info, "Invalid CRC, packet discarded");
return;
}
rd.Fetch(receiveDescriptorBase | receiveDescriptorOffset);
if (!rd.Enable)
{
//if receive descritptor disabled discard packet
return;
}
machine.SystemBus.WriteBytes(frame.Bytes, (long)rd.PacketAddress);
registers.Status = 1u << 2;
if (rd.Wrap)
{
receiveDescriptorOffset = 0;
}
else
{
if (receiveDescriptorOffset != 0x3f8)
{
receiveDescriptorOffset += 8;
}
else
{
receiveDescriptorOffset = 0;
}
}
if (rd.InterruptEnable && ((registers.Control & (1u << 3)) != 0))
{
registers.Status |= 1u << 2;
this.IRQ.Set();
this.IRQ.Unset();
}
rd.Length = (uint)frame.Bytes.Length;
rd.Enable = false;
rd.Wrap = false;
rd.WriteBack();
}
private void ReceiveFrameInner(EthernetFrame frame)
{
if((registers.Control & (1u << 1)) == 0)
{
//if receiving is disabled discard packet
return;
}
var rd = new receiveDescriptor(machine.SystemBus);
rd.Fetch(receiveDescriptorBase | receiveDescriptorOffset);
if(!rd.Enable)
{
//if receive descritptor disabled discard packet
return;
}
machine.SystemBus.WriteBytes(frame.Bytes, (long)rd.PacketAddress);
registers.Status = 1u << 2;
if(rd.Wrap)
{
receiveDescriptorOffset = 0;
}
else
{
if(receiveDescriptorOffset != 0x3f8)
{
receiveDescriptorOffset += 8;
}
else
{
receiveDescriptorOffset = 0;
}
}
if(rd.InterruptEnable && ((registers.Control & (1u << 3)) != 0))
{
registers.Status |= 1u << 2;
this.IRQ.Set();
this.IRQ.Unset();
}
rd.Length = (uint)frame.Length;
rd.Enable = false;
rd.Wrap = false;
rd.WriteBack();
}
