11/4/71   - JONL -

**** THERE ARE SOME NEW FUNCTIONS IN BOTH LISP AND NLISP.
     EXPLODEN IS LIKE EXPLODEC, EXCEPT THAT THE LIST OF ITEMS
	PRODUCED  CONTAINS THE ASCII VALUES [AS FIXED-POINT NUMBERS]
	OF THE EXPLODED PARTS, INSTEAD OF SINGLE CHARACTER OBJECTS.
     PLUSP OPERATES SIMILARLY TO MINUSP.
     IF A RETURN IS EXECUTED AT THE TOP LEVEL OF A BREAK,
	[SEE PRIOR NOTES ON BREAK LOOPS] THEN THE BREAK WILL EXIT
	RETURNING THE GIVEN VALUE RATHER THAN THE DEFAULT VALUE
	AS DESCRIBED IN PRIOR NOTES.
     WHILE TYPING IN FROM A JOB CONSOLE OF THE DISPLAY TYPE, YOU MAY
	HAVE NOTICED THAT TYPING CONTROL-L CLEARS THE SCREEN AND
	RETYPES THE CURRENT TTY INPUT BUFFER.  YOU MAY NOW USE
	CONTROL-K TO MERELY DO A CARRIAGE-RETURN-LINE-FEED FOLLOWED
	BY A RETYPING OF THE TTY INPUT BUFFER.  

**** CONTRARY TO WHAT YOU MAY HAVE HEARD, THE LISP FUNCTION
     SET IS BACK WITH US AS AN ORDINARY OLD SUBR OF TWO ARGUMENTS.
     SETQ HAS ALWAYS BEEN AN FSUBR, AND HAS BEEN RECENTLY ACCEPTING
     MULTIPLE REQUESTS LIKE (SETQ A 1 B 2 C 3).  CODE COMPILED FOR
     FUNCTIONS USING SET WILL NOT BE AFFECTED BY THIS CHANGE.


**** IRA, JERRY LERMAN, AND I ARE DEVELOPING A SIMPLE, NEAT
	DISPLAY LANGUAGE FOR USE IN LISP.  WE ENVISION USING
	THE PDP6 AS AN OFF-LINE DISPLAY PROCESSOR SO THAT ONE
	MAY OBTAIN HIGH-QUALITY IMAGES WITHOUT SLOWING DOWN THE 
	TIME-SHARING SYSTEM.  A PDP-10 ON-LINE VERSION OF THE
	PROCESSOR WILL BE USED WHEN THE 6 IS NOT AVAILABLE 
	[FOR COMPATIBILITY], BUT OF COURSE THIS WILL CAUSE SOME
	DEGRADATION OF THE ITS PERFORMANCE.  PERSONS WITH EITHER
	EXPERIENCE DESCRIBING VISUAL SCENES, DISPLAYS, GRAPHS, ETC.,
	OR WITH STRONG IDEAS ON HOW TO DO SO EASILY, SHOULD SPEAK
	WITH US SOON.

**** THE GOODIES ABOUT THE GARBAGE COLLECTOR MENTIONED IN THE LAST 
	UPDATE NOTE [REGARDING INTERRUPT NUMBER 10. FOR CATCHING 
	STORAGE SPACE CAPACITY EXCEEDED ERRORS] APPLIES TO LISP 
	AS WELL AS NLISP.


**** SOME BUGS IN THE BIGNUMBER INPUT ROUTINES HAVE BEEN
	REPAIRED, AS WELL AS SOME ANNOYING BUGS IN THE FLOATING-POINT
	PRINTOUT ROUTINE OF NLISP.