When Are The Contents Of Packet Descriptor Word0 Stored In Transmit Vc Table Word0; Is There A Limit To The Number Of Vcs Linked To A Shaper; Is There Any Problem If The Value Of The Vacant Field (Word1, Word2 Bits 31 To 16); Of The Transmit Packet Descriptor Is Not 0? Are The Values On The System Memory Rewritten - NEC mPD98409 Q&A