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- This astrology program is written in MBasic 80, Rev. 5.21, for
- CP/M computers.
-
- This program calculates the positions of the ten planets,
- including the sun and moon, and the twelve house cusps. These
- are the essential elements needed to draw up a horoscope. I
- chose the Placidus house system because I am familiar with it
- from Raphael's Table of Houses. The accuracy of the positions is
- generally exact, with deviations being no more than about 5
- minutes of arc; deviations are likely to be due more to
- inaccuracy in entering the time of birth than to problems with
- the program.
-
- Enter the date of birth as the prompt (MM.DDYYYY) shows, e.g.,
- you would enter October 16, 1985 as 10.161985.
-
- Respond to the AM*PM birth time prompt by typing in either AM or
- PM.
-
- The TIME prompt asks for the time as recorded on the birth
- certificate, which should be Standard Time. Astrologers who
- "know too much" should not enter Mean Local Time as the program
- automatically makes this adjustment. However, if Daylight
- Savings Time was in effect when the time was recorded it is
- important that an hour be subtracted from the birth time before
- entering the time. Also, if the birth occurred between either
- midnight or noon and 1 o'clock, do NOT enter the time as 12.xx,
- but as 00.xx, e.g., 12:42 at night would be AM and 00.42.
-
- TIME ZONE IN HOURS refers to the distance in hours between
- Greenwich Time and the time zone in which the birth time was
- recorded. Hours for the U.S. Standard Time zones are as follows:
- Atlantic 4
- Eastern 5
- Central 6
- Mountain 7
- Pacific 8
- Yukon 9
- Alaska- Hawaii 10
- Bering 11
- Although zones sometimes have irregular boundaries, the general
- rule is that time changes by 1 hour every 15 degrees of
- geographical longitude. Zones east of Greenwich Time are entered
- as negative hours, e.g., the zone in Paris, France is -1.
-
- Geographical LONGITUDE can be taken from any atlas. Longitudes
- west of Greenwich are positive. Longitudes east of Greenwich are
- negative. The longitude of Los Angeles is 118.15. The longitude
- of Paris, France is -2.20
-
- Geographical LATITUDE is positive north of the equator, negative
- south of the equator. The latitude of Los Angeles is 34.03. The
- latitude of Rio de Janeiro, Brazil is -23.00.
-
- That's it. Be patient while it says "Calculating..." On a 4 MHz
- machine it takes about 1.3 minutes to calculate and print both
- the planetary positions and house cusps to the screen. If you
- want to save a hard copy and you don't have a "Print Screen" key,
- turn on the print feature with control-P before leaving CP/M for
- MBASIC. Or, if you like, go into the listing and EDIT lines
- 1800, 1805, 4803, & 4804 to change the PRINT commands to LPRINT.
-
- The program was assembled and adapted from the numerous
- subprograms contained in the Manual of Computer Programming for
- Astrologers by Michael Erlewine with acknowledgement to James
- Neely for the planetary routines. This book was published
- without copyright in 1980 by The American Federation of
- Astrologers, Inc. The book gives routines for calculating
- additional information of interest to astrologers (e.g., the
- aspects between the planets) and for printing the information in
- various formats. I did not judge these elements to be worth my
- trouble (the book's code requires considerable debugging) - I am
- not interested in providing people with a free do-it-yourself
- astrologer kit. It is a relatively easy matter for a decent
- astrologer to enter the information from this program onto a
- blank chart form and then identify the important planetary
- aspects.
-
- If you have printed out the horoscope positions of yourself or a
- friend and then want to know "But what does it mean?", I think
- the best book for interpreting horoscopes is Heaven Knows What by
- Grant Lewi; its companion volume is called Astrology for the
- Millions.
-
- John Halloran
- P.O. Box 75713
- Los Angeles, CA 90075
-