INT 68 - APPC/PCIBM PC - CONNECTION CONTROL - TEST AH = 02h subfn 1200h DS:DX -> control block (see #03697) Return: control block updated SeeAlso: AH=02h/SF=1300h Format of APPC/PCIBM PC "Test" control block: Offset Size Description (Table 03697) 00h 12 BYTEs reserved 0Ch WORD 1200h (verb "Test" or "MC_Test") 0Eh BYTE 1 if MC_ (mapped conversation) form of verb 0 if basic verb 0Fh 5 BYTEs reserved (0) 14h WORD (big-endian) primary return code (see #03681) 16h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. (big-endian) error code (see #03682) 1Ah 8 BYTEs (big-endian) TP_ID 22h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. (big-endian) conversation ID 26h BYTE (MC_Test only) test (0=posted, 1=request_to_send received) Note: error code has different interpretations for: 0 posted data 1 posted not data (primary return code = 0) 1 bad TP_ID (primary return code = 1)