COMPIL(WRD,<ARRYOUT,WORDOUT,ARRYIN,WORDIN>
	  ,<GETCHN,SAVE,RESTR,GOGTAB,SIMIO,X22,X33,X44,NOTOPN>
	  ,<ARRYIN, ARRYOUT, WORDIN, AND WORDOUT>)
HERE (ARRYOUT)
	PUSHJ	P,SAVE
	MOVE	LPSA,[XWD 4,4]
ARO:	MOVE	CHNL,-3(P)
	LOADI7	A,<ARRYOUT>
	PUSHJ	P,GETCHN
CMU <
	SETZM	@ENDFL(CDB)	;CLEAR ERROR FLAG
>;CMU
	LDB	TEMP,[POINT 4,DMODE(CDB),35] ;CHECK MODE
CMU <
	MOVEI	Z,1		;ASSUME NOT IMP MODE
	CAIN	TEMP,3		;IS THE MODE 3?
	 TRZA	Z,-1		; YES - CMU 32-BIT IMP MODE.
	CAIN	TEMP,4		; (THIS ONE IS CMU-IMAGE MODE)
	 JRST	OUTRAY		; THEN OKAY, NOT DUMP MODE EITHER.
>;CMU
	CAIGE	TEMP,10		;MAKE SURE AT LEAST BINARY MODE
	 ERR	 <ARRYOUT: mode must be '14,'10, or '17, not >,6
	MOVE	0,[XCT IODOUT,SIMIO] ;IN CASE DUMP MODE
	CAIL	TEMP,15
	 JRST	 ARYDMP		;COMMON DUMP MODE ROUTINE
OUTRAY:	MOVE	A,-2(P)		;STARTING LOC
	SKIPGE	B,-1(P)		;EXTENT
	ERR	<ARRYOUT: negative word count, value is>,6
WOUT2:	SKIPG	E,OCOWNT(CDB)	;# WORDS LEFT IN BUFFER
	JRST	WOUT5		;BETTER GET ANOTHER BUFFER
	JUMPE	B,RESTR		;NOTHING LEFT TO DO
CMU <
	CAIN	Z,0		;IMP MODE?
	LSH	E,-2		;DIVIDE BY 4 TO GET WORD COUNT
>;CMU
	IBP	OBP(CDB)	;MAKE SURE PTRS TO FIRST WORD
CMU <
	CAIN	Z,0		;IMP MODE?
	DPB	Z,[POINT 6,OBP(CDB),5]
>;CMU
	MOVE	C,OBP(CDB)	;"TO" ADDR
	HRRZI	D,(C)		;FOR BLT TERMINATION CALCULATION
	HRLI	C,(A)		;"FROM" ADDR
	CAIGE	B,(E)		;ENUFF IN BUFFER?? (NOTICE THAT CAIGE
	JRST	WOUT3		;YES
	ADDI	D,-1(E)		;FINAL ADDR
	BLT	C,(D)		;DO IT!
	ADDI	A,(E)		;UPDATE PTR
	SUBI	B,(E)		;AND COUNT
	SETZM	OCOWNT(CDB)
	HRRM	D,OBP(CDB)
WOUT5:	XCT	IOOUT,SIMIO	;DO THE OUTPUT
	JFCL			;ERRORS HANDLED ALREADY
	JRST	WOUT2		;TRY NEXT CHUNK
WOUT3:	JUMPLE	B,RESTR		;NOTHING TO MOVE
	SUBI	B,1
	ADD	D,B		;END OF BLOCK
	BLT	C,(D)		;MOVE IT
	SUBI	E,1(B)		;FIX LENGTH
CMU <
	CAIN	Z,0		;IMP MODE?
	 LSH	E,2		;MULTIPLY BY 4 FOR BYTE COUNT
>;CMU
	MOVEM	E,OCOWNT(CDB)	;
	ADDM	B,OBP(CDB)	;FIX BYTE POINTER
	JRST	RESTR		;LEAVE LIKE A TREE AND MAKE
HERE (WORDOUT)			;WRITE ONE WORD
	PUSHJ	P,SAVE
	MOVE	LPSA,X33
	MOVE	CHNL,-2(P)
	LOADI7	A,<WORDOUT>
	PUSHJ	P,GETCHN
CMU <
	SETZM	@ENDFL(CDB)	;CLEAR ERROR FLAG
>;CMU
	LDB	A,[POINT 4,DMODE(CDB),35];DATA MODE
	CAIL	A,15		;A DUMP MODE?
	 JRST	 DMPWO		;WO IS ME, YES
WDO:	SOSL	OCOWNT(CDB)	;BUFFER FULL?
	 JRST	 WOKO		;NO
	XCT	IOOUT,SIMIO	;YES, WRITE IT
	 JFCL			; ERRORS HANDLED ELSEWHERE
	JRST	WDO		;GO BACK AND DO IT RIGHT
WOKO:	MOVE	TEMP,-1(P)	;THING TO BE WRITTEN
	IDPB	TEMP,OBP(CDB)	;WRITE IT
	JRST	RESTR
DMPWO:	MOVE	LPSA,[XWD 7,7]	;ACCOUNT FOR EVERYTHING
	MOVEI	TEMP,-1(P)	;PNT TO WORD TO BE WRITTEN
	PUSH	P,-2(P)		;CHANNEL
	PUSH	P,TEMP		;ADDR OF WORD
	PUSH	P,[1]		;COUNT
	PUSHJ	P,ARO		;JOIN THE ROUTINE (RETAD JUST FOR STACK SYNCH)
HERE (ARRYIN)
	PUSHJ	P,SAVE
	MOVE	LPSA,X44
ARI:	MOVE	CHNL,-3(P)
	LOADI7	A,<ARRYIN>
	PUSHJ	P,GETCHN
	SETZM	@ENDFL(CDB)	;ASSUME NO END OF FILE
	LDB	TEMP,[POINT 4,DMODE(CDB),35] ;CHECK DUMP MODE
CMU <
	MOVEI	Z,1		;ASSUME NOT IMP MODE
	CAIN	TEMP,3		;IS THE MODE 3?
	 TRZA	Z,-1		; YES - CMU 32-BIT IMP MODE.
	CAIN	TEMP,4		;IF ONE OF THE SPECIAL CMU MODES,
	 JRST	INARY		; THEN OKAY, NOT DUMP MODE EITHER
>;CMU
	CAIGE	TEMP,10
	 ERR	 <ARRYIN: mode must be '10 or '14 or '17, not >,6
	MOVE	0,[XCT IODIN,SIMIO] ;IN CASE DUMP MODE
	CAIL	TEMP,15
	 JRST	 ARYDMP		;USE COMMON ROUTINE
INARY:	MOVE	A,-2(P)		;STARTING LOC
	SKIPGE	B,-1(P)		;EXTENT
	ERR	<ARRYIN: negative word count, value is >,6
WIN3:	JUMPE	B,RESTR		;NOTHING LEFT TO DO
	SKIPG	E,ICOWNT(CDB)	;#LEFT IN BUFFER
	JRST	WIN5
CMU <
	CAIN	Z,0		;IMP MODE?
	 LSH	E,-2		;DIVIDE BY 4 TO GET WORD COUNT
>;CMU
	IBP	IBP(CDB)	;MAKE SURE PTS TO NEXT
	HRL	C,IBP(CDB)	;ADDR OF FIRST WORD TO READ
	MOVEI	D,(A)		;FOR BLT TERMINATION
	HRR	C,A		;"TO" ADDRESS
	CAIG	B,(E)		;ENOUGH HERE?
	JRST	WIN4		;YES
	ADDI	D,-1(E)		;NO, FINISH THIS BUFFER
	BLT	C,(D)
	ADD	A,E		;FIX INPUT POINTER
	SUB	B,E		;FIX INPUT COUNT
WIN5:	XCT	IOIN,SIMIO	;DO INPUT
	JRST	WIN3		;OK, GO AHEAD
	JRST	WIEOF1		;EOF OR ERROR, LEAVE
WIN4:	ADDI	D,-1(B)		;FINISH UP
	BLT	C,(D)
	SUB	E,B		;FIX UP COUNT
CMU <
	CAIE	Z,0		;IMP MODE?
	 JRST	.+3
	LSH	E,2		;MULTIPLY BY 4 FOR BYTE COUNT
	DPB	Z,[POINT 6,IBP(CDB),5]
>;CMU
	SUBI	B,1		;PREPARE TO CORRECT BP
	MOVEM	E,ICOWNT(CDB)	;UPDATE WORDS LEFT
	ADDM	B,IBP(CDB)	; POINTER
	JRST	RESTR		;LEAVE
WIEOF1:	MOVE	TEMP,-1(P)	;#WORDS WANTED -1
	SUBM	TEMP,B		;#INPUT IN RH
WIN2:	HRRM	B,@ENDFL(CDB)	;#INPUT IN RH, ERR OR EOF BITS IN LH
	JRST	RESTR
HERE (WORDIN)			;READ ONE WORD -- USE ARRYIN
	PUSHJ	P,SAVE
	MOVE	LPSA,X22
	LOADI7	A,<WORDIN>
	MOVE	CHNL,-1(P)	;CHANNEL NUMBER
	PUSHJ	P,GETCHN
	LDB	TEMP,[POINT 4,DMODE(CDB),35];DATA MODE
	CAIL	TEMP,15		;DUMP MODE?
	 JRST	 DUMPWI		; YES
	SETZM	@ENDFL(CDB)
WI:	SOSL	ICOWNT(CDB)
	 JRST	 WOKI		;ALL OK
	XCT	IOIN,SIMIO
	 JRST	 WI		;OK, GO BACK TO KEEP COUNT RIGHT
	 TDZA	 A,A		;RETURN 0, WITH ERROR
WOKI:	ILDB	A,IBP(CDB)	;OK, RETURN NEXT WORD
	MOVEM	A,RACS+1(USER)	;RESULT
	JRST	RESTR
DUMPWI:	MOVE	LPSA,[XWD 6,6]
	MOVEI	TEMP,RACS+1(USER);RESULT GOES HERE
	PUSH	P,-1(P)		;CHANNEL
	PUSH	P,TEMP		;ADDRESS
	PUSH	P,[1]		;1 WORD TRANSFER
	PUSHJ	P,ARI		;WON'T RETURN, JUST SYNCH STACK
ARYDMP:	
	MOVN	TEMP,-1(P)		;-WORD COUNT
	JUMPGE	TEMP,[ERR <DUMP MODE WORD COUNT NOT POSITIVE, VALUE IS >,6]
	SOS	D,-2(P)			;STARTING ADDR - 1
	HRL	D,TEMP			;IOWD -COUNT,STARTING ADDR -1
	MOVEI	D+1,0			;TERMINATE THE READ
	MOVE	A,[JRST RESTR] ;IF IT SUCCEEDS
	MOVE	B,[JRST RESTR] ;IF IT FAILS (EOF OR ERR, ALREADY HANDLED)
	JRST	0		;GO DO DUMP I/O
HERE(WRDSP1)
HERE(WRDSP2)
HERE(WRDSP3)
	ERR	<DRYROT WRD SPARES>
ENDCOM(WRD)