Date   : Fri, 10 Sep 1982 1148-:00CDT
From   : John Otken <CC.Otken@Utexas-20>
Subject: Re: Info request..

The information I have concerning undocumented FCB fields:

dr	in directory entry - user number or E5 if file deleted
f1-f4	high bits are user assigned
t3	high bit set if file has been written to *
s2	not used in directory; in FCB, true if file doesn't need to be flushed
s1	carry out of the extent
rc	how many records are currently allocated in an extent
d0-d15	allocation map
		if disk size in blockds <= 256 each byte points to a block
		else each pair of bytes points to a block

* - defined in MPM, CPM86 and to be defined in CPM3(?)

Please compare this with your notes and tell me of any differences.

John.