### FILE="Main.annotation"
## Copyright:	Public domain.
## Filename:	SINGLE_PRECISION_SUBROUTINES.agc
## Purpose:	Part of the source code for Colossus 2A, AKA Comanche 055.
##		It is part of the source code for the Command Module's (CM)
##		Apollo Guidance Computer (AGC), for Apollo 11.
## Assembler:	yaYUL
## Contact:	Ron Burkey <info@sandroid.org>.
## Website:	www.ibiblio.org/apollo.
## Pages:	1207
## Mod history:	2009-05-13 RSB	Adapted from the Colossus249/ file of the
##				same name, using Comanche055 page images.
##		2016-12-21 RSB	Proofed comment text using octopus/ProoferComments
##				and corrected the errors found.
##
## This source code has been transcribed or otherwise adapted from digitized
## images of a hardcopy from the MIT Museum.  The digitization was performed
## by Paul Fjeld, and arranged for by Deborah Douglas of the Museum.  Many
## thanks to both.  The images (with suitable reduction in storage size and
## consequent reduction in image quality as well) are available online at
## www.ibiblio.org/apollo.  If for some reason you find that the images are
## illegible, contact me at info@sandroid.org about getting access to the 
## (much) higher-quality images which Paul actually created.
##
## Notations on the hardcopy document read, in part:
##
##	Assemble revision 055 of AGC program Comanche by NASA
##	2021113-051.  10:28 APR. 1, 1969  
##
##	This AGC program shall also be referred to as
##			Colossus 2A

## Page 1207
		BLOCK	02

# SINGLE PRECISION SINE AND COSINE

		COUNT	02/INTER
		
SPCOS		AD	HALF		# ARGUMENTS SCALED AT PI
SPSIN		TS	TEMK
		TCF	SPT
		CS	TEMK
SPT		DOUBLE
		TS	TEMK
		TCF	POLLEY
		XCH	TEMK
		INDEX	TEMK
		AD 	LIMITS
		COM
		AD	TEMK
		TS	TEMK
		TCF	POLLEY
		TCF	ARG90
POLLEY		EXTEND
		MP	TEMK
		TS	SQ
		EXTEND
		MP	C5/2
		AD	C3/2
		EXTEND
		MP	SQ
		AD	C1/2
		EXTEND
		MP	TEMK
		DDOUBL
		TS	TEMK
		TC	Q
ARG90		INDEX	A
		CS	LIMITS
		TC	Q		# RESULT SCALED AT 1
		
# SPROOT WAS DELETED IN REV 51 OF MASTER. ASS. CONT. HAS CARDS.