INT 2F U - DOS 3+ internal - GET JOB FILE TABLE ENTRY
AX = 1220h
BX = file handle
Return: CF set on error
AL = 6 (invalid file handle)
CF clear if successful
ES:DI -> JFT entry for file handle in current process
Note:   the byte pointed at by ES:DI contains the number of the SFT for the
file handle, or FFh if the handle is not open
SeeAlso: AX=1229h

See also: 2F1216

2F1220 - DOS 3+ internal - GET JOB FILE TABLE ENTRY