Int 7F Fn 26  - Alloy Ntnx, Mw386 - Get Ntnx File Mode                     [N]

   AH = 26h
   CL = 00h

Return: AX = file mode bits (see below)

Note:  MW386 does not support file modes, and always returns AX=001Fh

See Also: AH=26h,AH=26h/CL=06h

Bitfields for file mode bits:
 bit 0 directory protection enabled
 bit 1 extended open enabled
 bit 2 flush on every disk write
 bit 3 flush on every disk write in locked interval
 bit 4 flush on reads from simultaneously opened file