◄Up► ◄Next► ◄Previous► ──────────────────────────────────────────────────────────────────────────── mov ax, 1600h ; Get Enhanced-Mode Windows Installed State int 2Fh ; multiplex interrupt test al, 7Fh jz No_EM_Win ; 386 enhanced-mode Windows not running Get Enhanced-Mode Windows Installed State (Interrupt 2Fh Function 1600h) determines whether 386 enhanced-mode Windows is running. If a program intends to use a 386 enhanced-mode Windows function, it must first use this function to make sure that 386 enhanced-mode Windows is running. This function is valid under all versions of 386 enhanced-mode Windows. Return Value The return value is 00h or 80h in the AL register if 386 enhanced-mode Windows is not running. If 386 enhanced-mode Windows is running, the return value depends on the version of Windows. Windows/386 version 2.x returns 01h or 0FFh. Windows version 3.x returns the major version number in the AL register, and the minor version number in the AH register. Example The following example determines whether 386 enhanced-mode Windows is running, then determines which version is running. mov ax, 1600h int 2Fh test al, 7Fh jz No_EM_Win ; 386 enhanced-mode Windows not running cmp al, 1 je Ver_2x ; Windows/386 version 2.x running cmp al, -1 je Ver_2x ; Windows/386 version 2.x running mov byte ptr [MajorVer], al mov byte ptr [MinorVer], ah ♦