PGP Ethernet Version1

Support point-to-point and Networked Ethernet
- Generic for point-to-point for FPGA logic optimization
Chuck up the stream to MAX_SIZE=1024B (default)
- Support 8192B via VHDL generic
Use the MAC's FCS for error checking

Word#	Word's BYTE	Name	Description	Note
0	[5:0]	DestMac	Destination MAC	Unused in point-to-point mode
0	[11:6]	SrcMac	Source MAC	Unused in point-to-point mode
0	[15:12]	EtherType	0xBEEF	Unused in point-to-point mode
0	16	Version	0x1	Hardcoded
0	17	TID	Transaction ID	Increments once per packet Used for out-of-order frame reorganizing in network mode
0	[19:18]	Pause	Virtual Channel Pause	1 bit per Virtual Channel
0	20	Framing/VC	Stream Framing	BIT0: SOF BIT1: EOF BIT2: EOFE BIT3: OpCodeEn BIT[7:4]: Virtual Channel
0	[31:21]	Reserved	Reserved	Zeros
0	[47:32]	OpCodeData	128-bit OP-code Data	64-bit to support full timestamp triggering with bits to spare
0	[63:48]	UserData	128-bit User Data	Sampled every packet sent
1	[63:0]	Payload	User Payload Data
...	...	...	...
(MAX_SIZE/64)	[63:0]	Payload	User Payload Data

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