>a program can determine which hardware features are guaranteed to be >available by testing the level of the operating system in the CVT.
And a program can determine which hardware features "happen to be" available by checking bits in the facilities list (FLCFACL in IHAPSA, FlceFacilitiesList in IHAPSAE), or could issue the STFLE instruction themselves if they have determined that it is available. A program should not issue the STFL instruction; that is the province of the operating system which has done it for you checking bits in the SCPINFO (IHASCCB mapping pointed by CVTSCPIN) trying the instruction and fielding a PIC 1 when not installed And of course there are various tables in the Principles of Operation that can help to accomplish the goal in some cases (and you can build the list, tediously, from the individual instructions, seeing if they can get an operation exception and when). Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
