INT 68 - APPC/PC - NETWORK DEVICE CONTROL - ATTACH LOGICAL UNIT AH = 01h subfn 2100h DS:DX -> control block (see #03670) Return: control block updated SeeAlso: #03673,#03674,#03676,AH=01h/SF=2000h,AH=01h/SF=2200h,AH=01h/SF=2B00h