Format of APPC/PC "TP Started" control block: Offset Size Description ) 00h 12 BYTEs reserved 0Ch WORD 2400h (verb "TP Started") 0Eh 6 BYTEs 00h 14h DWORD (big-endian) return code (see #03668) 18h WORD 00h 1Ah 8 BYTEs (big-endian) logical unit ID 22h 8 BYTEs (big-endian) TP ID