Job File Table: Difference between revisions

Revision as of 03:15, 14 November 2015

Revision as of 17:39, 15 December 2015

Line 1:

{{Merge|Program Segment Prefix|discuss=Talk:Program Segment Prefix|date=June 2012}}

{{Unreferenced|date=December 2009}}

The '''Job File Table''' (JFT) is a [[DOS]] data structure in the [[Program Segment Prefix]] (PSP). It starts at PSP offset 0x18 and is 20 bytes long. For each open file handle, [[DOS]] stores the index into the [[System File Table]] (SFT). A file handle that is returned by open, _open and other similar functions is simply an index into the JFT where [[DOS]] stored the SFT entry index for the file or device that the program opened.