COMPIL(SCN,<SCAN>,<INSET,SAVE,RESTR,X44,STRNGC,BRKMSK>,<SCAN ROUTINE>)
HERE (SCAN)	PUSHJ	P,SAVE
	SKIPE	SGLIGN(USER)
	PUSHJ	P,INSET
	MOVE	LPSA,X44
	SOS	C,-3(P)		;PTR TO STRING TO BE SCANNED
	HRRZ	A,(C)		;#CHARS IN INPUT STRING
	JUMPE	A,NULSCN	;IF NO CHARS TO SCAN
	MOVE	B,1(C)		;INPUT BYTE POINTER
	MOVEI	Z,0
	SOSL	CDB,-2(P)	;TABLE #, CHECK IT
	CAILE	CDB,=17		;FOR IN RANGE
	 ERR	 <SCAN: There are only 18 break tables>,1,SCNNR
SCNNX:	MOVE	D,BRKMSK+1(CDB)	;HAS BITS ON FOR THIS TABLE
	TRNE	D,@BRKCVT(USER)	;WANT CONVERSION?
	TLOA	C,400000	; YES
	TLZ	C,400000	; NO
	ADDI	CDB,1(USER)	;RLC+ORIG CHNL #
	SETZM	@-1(P)		;BREAK CHAR WORD
	HRRZ	Y,USER
	ADD	Y,[XWD	X,BRKTBL];RLC+BRKTBL(USER)
	TRNN	D,@BRKOMT(USER)	;COPY IF OMIT CHARS
	JUMPGE	C,NOCPY		;OR IF DOING CONVERSION
	ADDM	A,REMCHR(USER)	;WE MUST COPY THE STRING
	SKIPLE	REMCHR(USER)	;THE "OUT OF SPACE DANCE"
	PUSHJ	P,STRNGC
	PUSH	SP,A
	PUSH	SP,TOPBYTE(USER) ;RESULT BYTE POINTER
	MOVE	B,1(C)		;GET BYTE POINTER BACK
SCNLUP:	SOJL	A,SCNDUN	;STRING EXHAUSTED
	ILDB	X,B		;GET A CHAR
	JUMPGE	C,NOCNVS	;ONLY CONVERT IF WANTED
	CAIL	X,"a"
	CAILE	X,"z"
	JRST	.+2
	TRZ	X,40		;MAKE IT UPPER CASE
NOCNVS:	TDNE	D,@Y		;TDNE D,BRKTBL+RLC(X)
	 JRST	 SCNSPC		;OMIT OR BREAK
	IDPB	X,TOPBYTE(USER)
	AOJA	Z,SCNLUP
SCNNR:	MOVNI	CDB,1		;USE TABLE 0;
	JRST	SCNNX
SCNSPC:	HLLZ	TEMP,@Y		;NOW SEE IF WE 
	TDNN	TEMP,D		;OMIT OR BREAK
	 JRST	 SCNLUP		; OMIT
SCNBRK:	MOVEM	X,@-1(P)	;SET BREAK CHAR WORD
SCNDUN:	SKIPN	TEMP,DSPTBL(CDB) ;WHAT DO WE DO WITH BRCHAR?
	 JRST	 ENDSCN		; NOTHING
	JUMPL	TEMP,SCNAPN	;APPEND TO END OF STRING
SCNRET:	SOS	B		;LEAVE FOR NEXT TIME
	REPEAT	4,<IBP B
>
	JUMPL	A,ENDSCN	;STRING WAS EXHAUSTED
	AOJA	A,ENDSCN	;PUT ONE BACK
SCNAPN:
	JUMPL	A,ENDSCN	;SCANNED OFF END, NOTHING LEFT TO APPEND
	IDPB	X,TOPBYTE(USER)
	ADDI	Z,1
ENDSCN:	MOVE	TEMP,Z		;#CHARS IN NEW STRING
	SUB	TEMP,-1(SP)	;NUMBER RESERVED BUT NOT USED
	ADDM	TEMP,REMCHR(USER);UNRESERVE THEM
	HRROM	Z,-1(SP)	;NOT A CONSTANT, NEW STRING SIZE
	JUMPGE	A,.+2		;IF EXHAUSTED, USE 0
	MOVEI	A,0
	HRRM	A,(C)		;UPDATE OLD COUNT
	MOVEM	B,1(C)		;UPDATED ORIGINAL BYTE POINTER
	JRST	RESTR		;POPJ	P,
NULSCN:	SETZM	@-1(P)		;NO BREAKS
	PUSH	SP,A		;NULL STRING RESULT
	PUSH	SP,A		;
	JRST	RESTR
NOCPY:	PUSH	SP,(C)		;COPY COUNT WRD FROM INPUT (WILL MUNCH)
	PUSH	SP,1(C)		;BYTE POINTER TO START
SCNLP2:	SOJL	A,SCNDN2	;COUNT DOWN
	ILDB	X,B		;GET NEXT CHAR
	TDNN	D,@Y		;IS BREAK CHAR ON (KNOW NOT OMIT)
	AOJA	Z,SCNLP2	;JUST REGULAR
	MOVEM	X,@-1(P)	;IT WAS THE BREAK CHAR
SCNDN2:	SKIPN	TEMP,DSPTBL(CDB) ; FIGURE OUT WHAT TO DO WITH BRK CHR
	JRST	ENDSC2		;NICHTS
	JUMPL	TEMP,SCNAP2	;APPEND IT
	ADD	B,[070000,,0]	;BACK UP BYTE POINTER
	JUMPG	B,.+2
	SUB	B,[430000,,1]	;BACK UP ONE WORD WHEN NECESSARY
	AOJA	A,ENDSC2	;& WE HAVE ONE MORE LEFT
SCNAP2:	ADDI	Z,1		;APPEND ONE MORE CHAR TO RESULT
ENDSC2:	HRRM	Z,-1(SP)	;
	CAIGE	A,0		;NEVER PUT NEG COUNT
	MOVEI	A,0		;THERE YOU GO
	HRRM	A,(C)		;FIX INPUT BYTE CNT
	MOVEM	B,1(C)		;NEW INPUT BYTE PTR
	JRST	RESTR		;ALL DONE
ENDCOM(SCN)