構造体定義書

static struct TxFD

No.	名称	属性	説明
1	TxFD
	status	volatile s16
	command	s16
	link	u32	void *
	tx_desc_addr	u32	(almost) Always points to the tx_buf_addr element.
	count	s32	# of TBD (=2), Tx start thresh., etc.
	tx_buf_addr0	u32	void *, header of frame to be transmitted.
	tx_buf_size0	s32	Length of Tx hdr.
	tx_buf_addr1	u32	void *, data to be transmitted.
	tx_buf_size1	s32	Length of Tx data.

TxFD