Format of APPC/PC "Attach Physical Unit" control block: Offset Size Description ) 00h 12 BYTEs reserved 0Ch WORD 2000h (verb "Attach Physical Unit") 0Eh 6 BYTEs 00h 14h DWORD (big-endian) return code (see #03668) 18h WORD 00h 1Ah BYTE version 1Bh BYTE release 1Ch 8 BYTEs (big-endian) net name 24h 8 BYTEs (big-endian) physical unit name 2Ch 8 BYTEs 00h 34h DWORD pointer to SYSTEM_LOG_EXIT routine, FFFFFFFFh=don't log errors (see also AH=01h/SF=2100h) 38h DWORD 00h 3Ch BYTE 00h RETURN_CONTROL: COMPLETE 01h RETURN_CONTROL: INCOMPLETE