MH> Does anybody have any experience in using the DosSleep function in a
  > DOS VDM under OS/2? I found some info (from INTER47*.*) about using
  > OS/2 functions from a DOS program running in a VDM, but the DosSleep
  > function is missing from the list. If somebody has more specific
  > information than the following, please drop a message.

The following is documented in INTER48:

================================ Begin =================================
___-----W-2F1680-----------------------------
INT 2F - MS Windows, DPMI, various - RELEASE CURRENT VIRTUAL MACHINE
         TIME-SLICE
        AX = 1680h
Return: AL = status
            00h if the call is supported
            80h (unchanged) if the call is not supported
Notes:  programs can use this function in idle loops to enhance
          performance under multitaskers; this call is supported by MS
          Windows 3.0, DOS 5+, DPMI 1.0+, and in OS/2 2.0+ for
          multitasking DOS applications
        does not block the program; it just gives up the remainder of
          the time slice
        should not be used by Windows-specific programs
        when called very often without intermediate screen output under
          WIN 3+, the VM will go into an idle-state and will not receive
          the next slice before 8 seconds. This time can be changed in
          SYSTEM.INI through "IdleVMWakeUpTime=". Setting to
          zero results in a long wait.
SeeAlso: INT 15/AX=1000h,INT 15/AX=5305h,INT 21/AH=89h,INT 7A/BX=000Ah
================================= End ==================================

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