CONFIG.SYS statements used by OS/2

This section contains some information about undocumented or poorly 
documented CONFIG.SYS statements used by OS/2. 

 AUTOFAIL=x 
    x maybe yes (no popup message for harderrors) or no (popup message for 
    harderrors), default is no. Note that the DLL RXU contains a function 
    to dynamically switch popup windows on and off. 

    Available: All versions 
    Source: various 

 AUTOREFRESHFOLDERS=NO 
    Suppress the automatic refresh of folder contents. If this feature is 
    activated, you must manually refresh the view of a folder after each 
    action 

    Available: WARP 4 only! 
    Source: various 

 DLLBASING=OFF 
    Reduce the fragmentation of loaded DLLs (ON by default) 

    Available: WSeB or after applying FP13 to Warp4 
    Source: various 

 DUMPPROCESS=x 
    Activate the dump process. The dump goes to the file PDUMP.nnn in the 
    root directory of drive specified in x (where nnn is an unique 
    number). 

    Available: All versions 
    Source: various 

 EARLYMEMINIT=TRUE 
    Adding "EARLYMEMINIT=TRUE" to config.sys will allow device drivers, 
    etc., access to the memory above 16mb early in boot. Previously, this 
    was only available after DD and IFS init was completed. This has 
    various implications when enabled: 

      *  large VDISKs are possible. I tried DEVICE=\os2\vdisk.sys 16000 
      *  AHA154X.ADD may do bad things to your system. Don't even ask. 
      *  There may be some settings of HPFS386 cache that are 
         incompatible. This feature is experimental. 

    Available: only available in the WARP kernels from testcase 
    Source: various 

 I13PAGES=1 
    SMP kernels could not be RIPL-booted. As part of this, there is a new 
    config.sys parameter I13PAGES= available. Adding I13PAGES=1 to 
    config.sys (note, no SET) reduces the memory usage of the mini VDM 
    processes used by ibm1s506.add and the GRADD drivers. This becomes 
    important in RIPL-boot situations. 

    Available: only available with Kernel 14.062 or higher 
    Source: various 

 MENUSTYLE=SHORT 
    Disable some entries from the object context menus 

    Available: All versions 
    Source: various 

 OBJECTSNOOZETIME=n 
    n is the snooze time for objects and DLLs in seconds (default is 90) 
    (see Note) 

    Available: All versions 
    Source: various 

 PAUSEONERROR=x 
    Pause after each error in the CONFIG.SYS (x=YES) or not (x=NO). 
    Default is YES. 

    Available: All versions 
    Source: various 

 REIPL=x 
    Save trap information into a file and reboot the workstation (x=ON) or 
    display an error message (x=OFF). Default is OFF. 

    Available: All versions 
    Source: various 

 RESERVEDRIVELETTER=x 
    "The ability to reserve drive letters feature has been added at WARP 
    FixPak level XRUW024.  A modification has been made to the OS/2 kernel 
    that will allow the user to specify, through a CONFIG.SYS parameter, 
    specific drive letters that will not be allocated for local block mode 
    devices during the processing of CONFIG.SYS. 

    SYNTAX: RESERVEDRIVELETTER=x 

    where x is letter D thru Z. Multiple RESERVEDRIVELETTER statements is 
    be allowed." 

    Available: WARP 3 FixPack #24 and newer (e.g. Warp4, WSeB,etc) 
    Source: various 

 SHAPIEXCEPTIONHANDLER=OFF 
    Disable the WPS API exception handler (see Note) 

    Available: All versions 
    Source: various 

 SHELLEXCEPTIONHANDLER=OFF 
    Disable the WPS exception handler (see Note) 

    Available: All versions 
    Source: various 

 SET DEVICEFONTDISABLED=NO 
    Setting this to YES. will cause very large/slow print jobs, since no 
    uploaded/internal printer fonts will be used. 
    You want it set to NO in most cases (NO is the default). 

    Available: WSeB and probably more recent WARP 3/4 fixpaks 
    Source: Peter Fitzsimmons (see EMail Addresses) 

 SET ENH_STRETCH=NO 
    The new feature "enhanced stretch-blitting"  has one known ill 
    side-effect, where some of the icons for folders and other items will 
    appear "washed out" when running in 24bpp or 32bpp. To fix this, you 
    can disable the new feature by adding this line. 

    Available: Warp 4 FP14 and newer (e.g. Warp4, WSeB,etc) 
    Source: ConfigTool 

 SET KILLFEATUREENABLED=on 
    Activate the list of all processes in the WarpCenter (hold down CTRL 
    and click on the windows icon on the WarpCenter to open the list). 
    Note that you can also use SCKILLFEATUREENABLED. 

    Available: WARP 4 only! 
    Source: c't 1/1997 

 SET LIBPATHSTRICT=x 
    (x maybe T (true) or F (false) 
    Allows creation of a local version of the BEGINLIBPATH statement that 
    can include DLLs that have the same name as globally loaded DLLs. The 
    local DLLs are checked before the globals. Thus if your program has a 
    DLL that is the same name as another, you can create a command file 
    with the SET LIBPATHSTRICT=T, a SET BEGINLIBPATH=my program's dll, and 
    the path & name of my program, and run your program. 

    Note that you must set this environment variable in an OS/2 session - 
    an entry like "SET LIBPATHSTRICT=T" in the CONFIG.SYS is useless. (see 
    also  Simulating an AUTOEXEC.BAT for OS/2 sessions) 

    Available: New kernel instruction in WARP kernels from testcase since 
    September 1, 2000 
    Source: ConfigTool 

 SET MENUSFOLLOWPOINTER=ON 
    This makes the WarpCenter menus behave like the Start menu of Windows 
    95: The menus follow the mouse pointer. 

    Available: WARP 4 with Fixpack #5 or later 
    Source: various 

 SET NOLARGENTEXEICON=n 
    Limit the number of megabytes (=n) the WPS should scan through Windows 
    EXE files for the program icon before assigning a default icon 

    Available: New kernels from testcase (APAR PJ27886) 
    Source: XWorkplace Mailinglist 

 SET NEWNOTEBOOKS=ON 
    Enables the new notebooks for applications written prior to WARP 4 

    Available: This setting worked in the MERLIN Beta, but seems to be 
    disabled in WARP 4 GA. 
    Source: various 

 SET PM_ASYNC_FOCUS_CHANGE=x {time} 
    Enable the SIQFix (Single Input Queue Fix) and set the custom time-out 
    to time ms (default: 2000). Set x to OFF or remove the statement to 
    disable the SIQFix 

    Available: WARP 3 FixPack #17 and newer (e.g. Warp4, WSeB,etc) 
    Source: various 

 SET PM_DYNAMIC_DRAG=x 
    Activate (x=ON) or deactivate (x=OFF, default) the full window drag 
    for PM windows 

    Available: WARP 3 FixPack #17 and newer (e.g. Warp4, WSeB,etc) 
    Source: various 

 SET PM_ROLLUP_BUTTON=YES 
    Adds a new button to the window titlebars that you can use to "Roll up 
    your PM windows to just a titlebar". 

    Available: This setting worked in the MERLIN Beta, but seems to be 
    disabled in WARP 4 GA. 
    Source: Team OS/2 WEB pages 

 SET PM_PRINTSCREEN_ACTIVE_WINDOW=x 
    (x can be ON or OFF) If x is ON the window with the focus will print 
    when a Print Screen operation is initiated. If x is OFF, the default 
    Print Screen operation takes place. 

    Available: Warp 4 FP13 
    Source: ConfigTool 

 SET QUEUE_SIZE_THRESHOLD=X 
    Change the size of the message queue. Default is 100 for version prior 
    to the WARP 3 Fixpack #17 and 3000 for the WARP 3 Fixpack #17. 

    Available: WARP 3 FixPack #17 and newer (e.g. Warp4, WSeB,etc) 
    Source: various 

 SET RESTARTOBJECTS=x 
    Control the restart behaviour of the WPS, x may be YES (default), NO, 
    STARTUPFOLDERSONLY or REBOOTONLY. 

    Available: All versions 
    Source: various 

 SET RUNWORKPLACE=C:\OS2\PMSHELL.EXE 
    This statements points to the shell program to use - normally that's 
    the program C:\OS2\PMSHELL.EXE. But you can change this to any other 
    program if you want to restrict the PC to only run that program (e.g. 
    SET RUNWORKPLACE=C:\OS2\MDOS\WINOS\PROGMAN.EXE). 

    Available: All versions 
    Source: various 

 SET SCCANBENUKED=ON 
    This makes the WARPCenter object "nukeable" i.e. you can right click 
    and choose "Delete" which is not possible normally. 
    If SCCANBENUKED does not work, try CANBENUKED. 

    Available: WARP 4 only! 
    Source: Team OS/2 WEB pages 

 SET SCFINDUTILITY={anyprogram_or_anyObjectID} 
    This allows you to define any external program (OS/2, DOS, Windows, or 
    even an object ID like <WP_OS2SYS>!) for the flashlight icon on the 
    WARPCenter. Click the little flashlight icon (WARPCenter) and you get 
    whatever you specified. 
    If SCFINDUTILITY does not work, try FINDUTILITY. 

    Available: WARP 4 only! 
    Source: Team OS/2 WEB pages 

 SET SCKILLCONFIRMDISABLED=ON 
    Avoid the "Are you sure dialog" if using the kill feature of the 
    WARPCenter activated with SET KILLFEATUREENABLED=on. Note that you must 
    also add the entry SET KILLCONFIRMDISABLED=1 to make this work. 

    Available: WARP 4 only! 
    Source: Team OS/2 WEB pages 

 SET SCUSEPRETTYCLOCK=1 
    Change the color of the clock from the WARPCenter to green on black 
    If SCUSEPRETTYCLOCK does not work, try USEPRETTYCLOCK. 

    Available: WARP 4 only! 
    Source: Team OS/2 WEB pages 

 SET SHELLHANDLESINC=n 
    Increment the number of file handles available to a shell process 
    (e.g. a REXX program started by the CMD.EXE) by the amount of n. (see 
    also Maximum files per session; tested only in WARP 4 with Fixpack #6) 
    

    Available: WARP 4 with Fixpack #6 
    Source: various 

 SUPPRESSPOPUPS=x 
    Save error information into the file POPUPLOG.OS2 in the root 
    directory of the drive x and suppress the dialogs (On WARP 4 with 
    Fixpack #3 x may be 0 to simulate the behaviour of OS/2 versions prior 
    to this version). 

    Available: All versions 
    Source: various 

 SXFAKEHWFPU=1 
    Activate a fix for a "math rounding error" in WARP 4 

    Available: WARP 4 only! Fixpack #1 
    Source: WARP 4 Fixpack 1 documentation 

 VIRTUALADRESSLIMIT=n 
    (n is the limit in kb) 

    The default value for VIRTUALADDRESSLIMIT in OS/2 Warp Server for 
    e-business is 1 GB (n=1024). The VIRTUALADDRESSLIMIT parameter is also 
    available for OS/2 Warp Server SMP Feature and Warp 4.0 Fixpak 13. 
    Areas of memory below 512 MB have been remapped for higher 
    availability in that region. 

    2048 allows max. memory allocated 2 Gigs of shared RAM. Only useful 
    for developers. 

    You must have a hard disk that can accommodate the swap file. UW2SCSIs 
    are recommended for the swap disk unless you wish to see your computer 
    behave like a washing machine in spin dry mode. 

    The OS/2 Warp Server Advanced SMP addendum states that this number can 
    go to 3 Gigs. Memory support has also been enhanced since now an 
    application can access a virtual memory address space of up to 3 GB by 
    use of the VIRTUALADDRESSLIMIT = 3072 parameter in CONFIG.SYS. Areas 
    of memory below 512 MB have been remapped for higher availability in 
    that region. 

    Available: WSeB, Warp Server SMP, and Warp 4.0 Fixpak 13 
    Source: ConfigTool 

 VME=NO 
    Turn "Virtual mode extension (VME)" off (see Note about VME) 

    Available: All versions 
    Source: various