INT 2F U - DOS 3.0+ internal - OPEN DEVICE AND SET SFTsee System File Table OWNER/MODE AX = 120Ch SDAsee Swappable Data Area current SFTsee System File Table pointer -> SFTsee System File Table for file DS = DOS DS SS = DOS DS (must be using a DOS internal stack) Return: ES, DI, AX destroyed Notes: invokes "device open" call on device driver for SFTsee System File Table changes owner of last-accessed SFTsee System File Table to calling process if it was opened via FCBsee File Control Block called by network redirectors such as MSCDEX