INT 2F U - IFSFUNC.EXE (DOS 4.x only) - ???
AX = 112Fh
SS = DOS DS
STACK: WORD function in low byte
00h ???
DS:SI -> Current Directory Structure???
CL = drive (1=A:)
01h ???
DS:SI -> ???
CL = file handle???
02h ???
DS:SI -> Current Directory Structure???
DI = ???
CX = drive (1=A:)
???
Return: CF set on error
AX = DOS error code (see INT 21/AH=59h)
CF clear if successful
Note:   called by DOS 4.0 kernel

See also: 216B

2F112F - IFSFUNC.EXE (DOS 4.x only) - ???