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letter.txt
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1988-02-03
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3KB
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64 lines
17652 Wellington Ave.
Tustin, CA 92680
February 3, 1988
PC-SIG
1030D East Duane Avenue
Sunnyvale, CA 94086
Gentlemen:
I am submitting the enclosed program entitled "Silicon Sky"
for distribution as "Shareware". The requested registration
fee is $10.00. Silicon Sky is an astronomy program which
displays approximately 1600 stars as seen from any latitude
on earth for a selected date, time and direction of
observation. In addition the program displays the location of
the sun, moon and planets and shows the correct phase of the
moon. More detailed technical data giving coordinates of
solar system objects can be displayed by selecting the proper
option from the on-screen menu. Finally, it identifies the
constellations visible on the screen by marking out their
boundaries.
The program requires an IBM or compatible with a color
graphics card (CGA) or an enhanced graphics card (EGA). An
8087 math co-processor chip is supported and speeds up
execution time considerably, especially when compared to a
standard PC without the chip. The contents of the individual
files are as follow:
SISKY.EXE The main program for machines without 8087 chip
SISKY87.EXE The main program for machines with 8087 chip
INIT.EXE Initialization program for non 8087 machines
INIT87.EXE Initialization program for 8087 machines
SISKY.XYZ Coordinate data for 1600 stars
SISKY.CLR File with initialization data
SISKY.HRZ Horizon for sky display
SISKY.DME Top of celestial sphere for sky display
SISKY.CNM Name and central coordinates for constellations
READ.ME Text file with program instructions
LETTER.TXT Text file with this letter
ARIES...VOLANS These thirty five files contain
boundary data for each constellation
Sincerely,
Larry Adkins