Data Storage Files - LSI M-Three Operator's Manual

A> is displayed (see 5.2). If the other disk drive is to be used, its
selection can be achieved by adopting the following procedure:
a) Key in the drive's designated letter (B orC).
b) Key in a colon (:).
c) Depress the RETURN key.
This procedure should be repeated when reselecting drive
A. For a
full description of drive procedures see CP/M manual.
5.5 DATA STORAGE FILES
All of the data stored on a disc or diskette is separated into 'files',
irrespective if what kind of information these files contain
(programs, program data, documentation, etc.). Each file has its own
unique name and can therefore be handled by CP/M as a separate
entity. The complete filename consists of two parts separated by a
full-stop.
The first part of the filename can be up to any eight alpha-numeric
characters and is usuallv chosen bv the fi Ie's creator to be a
pseudonym for the file's contents.
The second part of the fi lename is restricted to three alpha-numeric
characters which should conform to the CP/M standard for the file's
type, i.e. DOC for documentation files. For a full description of the
CP/M recommendations, consult a suitable CP/M manual.
As an example of the filename structure, the CP/M file that
contained the documentation for this manual was titled M30PMAN 1.
DOC. This stands for M3 OPerator's MANual issue 1 and it is a
DOCumentation file.
The maximum number of files allowable per disk or diskette is as
follows:
64 Per single-sided 5 1/4" diskette
128 Per double-sided 5 1 /4" diskette
128 Per single-sided 8" diskette
256 Per double-sided 8" diskette
512 Per Winchester disk
5-3