00100	ALPHABETIC SUMMARY OF TELETYPE COMMANDS.
00200	
00300	
00400	"A"	Toggle Arc Make flag.
00500	"B"	Drive the cart backwards.
00600	"C"	Cut intensity level.
00700	
00800	"D"	Toggle baby polygon delete flag.
00900	"E"	Select Edge Display.
01000	"F"	Drive the cart forwards.
01100	
01200	"G"
01300	"H"	Display histogram.
01400	"I"	Input TV picture from a disk file.
01500	
01600	"J"	Contour TV image at levels 6% from ends of histogram.
01700	"K"	Toggle Krakauer flag.
01800	"L"	Set cart steering to hard left position.
01900	"αL"	Pan cart camera to the left.
02000	
02100	"M"
02200	"N"	Next image.
02300	"O"	Output TV file.
02400	"αO"	Output CRE file.
02500	"P"	Plot file output to disk the current III display buffer.
02600	
02700	"Q"	Contour TV image at equally spaced levels.
02800	"R"	Set cart steering to hard right position.
02900	"αR"	Pan cart camera to the right.
03000	"S"	Select camera number.
03100	
03200	"T"	Take 4-bit television picture.
03300	"αT"	Take 6-bit television picture.
03400	"U"	Toggle KILVIC enable flag.
03500	"V"	Enter cart diagnostic sub command mode.
03600	
03700	"W"	Alter Arc width table.
03800	"X"	XGP output.
03850	
03900	"Y"	Display arc-contour.
04000	"αY"	Display both-contour.
04100	"βY"	Display vector-contour.
04200	"εY"	Display vector contour without dekinking.
04300	
04400	"Z"	Zero data structure.
04500	"αZ"	Zoom Reset to initial display position.
     

00100	SUMMARY OF BASIC COMMANDS.
00200	
00300		"T"	Take a 4-bit television picture.
00400		"H"	Display histogram.
00500	
00600		"Q"	Make CRE image, from three intensity cuts.
00700		"C 00"	Make CRE image by thresholding at 00.
00800	
00900		"O"	Output television picture.
01000		"αO"	Output CRE file.
01100		"X"	Output video to XGP.
     

00100	TELEVISION PICTURE IO COMMANDS.
00200	
00300		"T"	Take a 4-bit video image from camera.
00400		"αT"	Take a 6-bit video image from camera.
00500	
00600		"S"	Select television camera.
00700	
00800		"O"	Output video image file to disk.
00900		"I"	Input  video image file from disk.
     

01000	LINK FOLLOWING COMMANDS  &  NODE CONTENTS DISPLAY.
01100	
01200		These 14 commands allow detailed inspection of the  CRE  data
01300	structure by showing the contents of a node. Data halfwords of a node
01400	are displayed in octal;  link  halfwords  are  displayed
01500	prefixed  with a letter indicating the type of node being pointed at;
01600	a zero link is displayed as "NIL".
01700	
01800	The FILM node, which is the root  of  the  whole  data  structure  is
01900	fetched  and  displayed  by  the  "+" command. From the Film, the ">"
02000	command can be used to get SON(FILM) which is always the first image,
02100	and  ">" command of an image will get a level and ">" of a level will
02200	get a polygon. Now vectors, polygons, edges and faces are intensified
02300	when  their  contents  are  being displayed. The exit command is "!",
02400	which leaves the screen less cluttered.
02500	
02600	
02700		NODE CONTENTS DISPLAY
02800		INITIATION & TERMINATION COMMANDS.
02900	
03000			"+"	Fetch Film Node.
03100			"!"	Flush diagonostic node display.
03200	
03300	
03400	      WORD     NODE FETCH
03500	     POSITION   COMMAND      NAMES OF LINKS AT THIS WORD.
03600	
03700		0.	","  "."	CW,,CCW
03800		1.	"<"  ">"	DAD,,SON
03900		2.			There is never a link at this word.
04000		3.	"↓"  "↑"	NFACE,,PFACE   or   ENDO,,EXO
04100		4.	"≤"  "≥"	NED,,PED   or   ARC,,PED
04200		5.	"←"  "→"	NVT,,PVT   or   NGON,,PGON
04300		6.	"⊂"  "⊃"	NTIME,,PTIME
     

00100	DISPLAY WINDOW SCROLLING COMMANDS.
00200	
00300		;	MOVE CAMERA LEFT.
00400		:	MOVE CAMERA RIGHT.
00500		(	MOVE CAMERA DOWN.
00600		)	MOVE CAMERA UP.
00700		-	SHRINK IMAGE - ZOOM OUT.
00800		*	MAGNIFY IMAGE - ZOOM IN.
00900		αZ	RESET SCROLL VALUES.
01000		/	HALVE STRENGTH OF SCROLLING DELTA.
01100		\	DOUBLE STRENGTH OF SCROLLING DELTA.
01200	
01300	DISPLAY MODES.
01400	
01500		"Y"	DISPLAY ARC POLYGONS ONLY.
01600		"βY"	DISPLAY VECTOR POLYGONS ONLY.
01700			(which usually do not exist unless the "U" command
01800			prevented their being deleted after being used.)
01900		"αY"	DISPLAY BOTH ARC & VECTOR POLYGONS.
02000		"εY"	DISPLAY VECTOR POLYGONS WITHOUT DEKINKING.
02100	
02200	IMAGE OUTPUT COMMANDS.
02300	
02400		"X"	Output video image on Xerox Graphics Printer.
02500		"P"	Output III plot file to disk.
     

00100	OPERATIONAL SUMMARY OF CRE TELETYPE COMMANDS.
00200		
00300	INPUT/OUTPUT.
00400		
00500	CART-CONTROL.
00600		
00700	DISPLAY-CONTROL.
00800		
00900	CONTOURING.
01000		"C"	cut at level.
01100		"Q"	equally spaced contours.
01200		"J"	Make two contour with respect to per centage from
01300			ends of histogram.
01400	
01500	 "Q"  -  3 CUTS:            20,         40,         60.
01600	"αQ"  -  7 CUTS:      10,   20,   30,   40,   50,   60,   70.
01700	"βQ"  -  8 CUTS:   04,   14,   24,   34,   44,   54,   64,   74.
01800	"εQ"  - 15 CUTS:   04,10,14,20,24,30,34,40,44,50,54,60,64,70,74.
     

00100	CART CONTROL COMMANDS  &  OPERATING THE CART.
00200	
00300		There are seven cart commands: drive  forwards,  drive
00400	backwards,  turn  left, turn right, pan camera left, pan camera right
00500	and halt:
00600	
00700		"F"	Drive Cart Forwards for one minute.
00800		"B"	Drive Cart Backwards for one minute.
00900		"L"	Turn steering wheels hard to left.
01000		"R"	Turn steering wheels hard to right.
01100		"αL"	Pan camera to the left for 10 seconds.
01200		"αR"	Pan camera to the right for 10 seconds.
01300		" "	Halt and continue spacewar job on PDP-6.
01400		"0"	Halt and continue spacewar job on PDP-6.
01500		carriage return	 -  Halt and stop spacewar job on PDP-6.
01600		
01700	
01800	First  and  most important is understanding how to stop the cart. The
01900	teletype halt command is " ", spacebar, or "0";  also  any  character
02000	other  than  "F",  "B", "L", or "R" will stop the cart. Cart commands
02100	are passed first from a teletype to the PDP-10, then  to  the  PDP-6,
02200	then  over  a citizens band, 27.045 megahertz, radio link to the cart
02300	control  logic;  and  so  when  communications  are  lacking  between
02400	entities  in  the  chain  of command the lower entities times out and
02500	causes the cart to halt. The cart control logic times out in a  fifth
02600	of  a  second if it does not hear from the PDP-6; the PDP-6 times out
02700	in less than a minute if it has not heard from the PDP-10; the  PDP-6
02800	also  stops broadcasting cart commands if it detects the death of the
02900	PDP-10; the PDP-10 job times out after 5 minutes of  not  hearing
03000	from the teletype and kills the PDP-6 spacewar job.
03100