Date   : Thu, 20 Dec 1990 21:09:15 GMT
From   : usc!pollux.usc.edu!mlinar@ucsd.edu (Mitch Mlinar)
Subject: UUCP and CPM Plus

Regarding the "length byte" in CP/M 3.0.

Checking my CP/M Plus manual, it is indeed the length in bytes (module 128).
Thus, a value of "00" means the sector is full.

In fact, that is the default because it is up to the application to set this
value.  There are FEW programs which worry or care about the length of the
last sector in CP/M since there was never this mechanism in CP/M 2.2 which
is still the mainstay (or clone-stay) of CP/M these days.

Unless you are strictly in CP/M+ land and ALL of your applications know it,
use of this byte is of no help.

-Mitch