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READ.ME
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1991-01-01
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Floppy Almanac
U. S. Naval Observatory
Nautical Almanac Office
Version 2.20.91
A few changes have been introduced with this new version of
the Floppy Almanac, and a few bugs have been chased out.
Due to incompatibilities in the BIOS routines of different
brands of machines, there appeared to be no end to the
problems which were occurring with the assembly language
routines that did the screen clearing. This problem has
been solved by the elimination of these routines. The
Floppy Almanac now has only 3 assembly language routines.
The rest of the program is entirely in FORTRAN, and the
screen clearing is done by writing blank lines to the
screen. It's not as elegant, but it works. A major problem
in the Navigation section was caused by the disappearance of
a line of code, causing a random value to be used for the
parallax in altitude of the Moon. This missing line of code
has been restored. A couple of minor irritations have been
removed also. All of the box drawing characters that
appeared in the tabular output have been removed. This will
greatly speed printing of output files on dot matrix
printers. The message stating whether or not the default
file FA.DFT was read has been eliminated. Finally, the
cursor size is never changed; it is only turned off and on.
When the program ends, the cursor is left at the default
size.
The requirements for running this version of the Floppy
Almanac remain the same as the previous editions: IBM PC or
clone with 256k RAM running MS DOS 2.0 or higher. There are
8 files on this disk. They are:
FA91.EXE
FA.DFT
STAR1.CAT
MESSIER.CAT
RADIO1.CAT
SAMPLE.TXT
CATALOG.EXE
READ.ME
The first file in the list is the executable file comprising
the Floppy Almanac, and is the only necessary file. It is
executed by simply typing the first four characters, that
is, FA91 (or fa91) for the 1991 Floppy Almanac. The program
will then begin execution, and the Floppy Almanac masthead
will scroll onto the screen followed by the main menu. The
Floppy Almanac is completely self-contained, and once the
main menu appears the disk can be removed from the drive;
no further disk reads are required for standard execution.
The other files on the disk are auxiliary files, which are
not used by most applications. Most of these files relate
to the optional facility for redefining the star catalog to
be used by the Floppy Almanac.
The file named SAMPLE.TXT is a small sample of a formatted
star catalog to be used as a model for creating other
catalogs. The large star catalog, STAR1.CAT, is the FK5
catalog.
Since the Floppy Almanac is menu- and prompt-driven, the
novice user can usually "feel" his way around its various
options and obtain useful information. One can become
fairly proficient in using the Floppy Almanac simply through
a series of trial-and-error runs. Nevertheless, there is a
significant amount of information about how the Floppy
Almanac works which is not obvious but which is quite
important for all but the most casual user. This
information is contained in the paper documentation
distributed by the National Audiovisual Center with each
Floppy Almanac disk.
Ordering Information:
Mail to:
National Audiovisual Center
Code FA
8700 Edgeworth Drive
Capitol Heights, MD 20743-3701
Each yearly edition of the Floppy Almanac is $25, and
includes two MS-DOS diskettes (5.25 and 3.5 inch) and a copy
of the paper documentation. Please make your check or money
order payable to the "NATIONAL ARCHIVES TRUST FUND (NAC)."
Credit card orders may be placed by calling 1-800-638-1300.
Please have your MasterCard or VISA account number and
expiration date handy.
A version for IBM mainframes running the VM/CMS operating
system, and for DEC VAX computers running VMS are also
available. Write to the National Audiovisual Center at the
above address for more information.
The Observatory is presently developing a series of software
packages that will include the functions of Floppy Almanac
along with the Air, Nautical and Astronomical Almanacs
presently available in print form only. When these programs
are complete, a single disk set will be offered through the
National Audiovisual Center. The anticipated availability
date is fall 1991.