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Trailing-Edge - PDP-10 Archives - LCG_Integration_Tools_Clearinghouse_T20_v7_30Apr86 - tools/tvaxv1/gtvr02.mar
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	.TITLE	GTVR02 - TV OUTPUT ROUTINE
;
;	IN	GFPTR = REL BYTE NR OF SCREEN PTR
;		GFCNT = NR OF BYTES IN BUFFER
;		GOPTR = START BYTE NR FOR OUTPUT
;		GSTAT/GXCTLL = ^L DONE
;
	.MACRO	MOVSP	P1
	MOVL	GTTAB,R1
	MOVL	P1*4(R1),R1
	MOVC3	(R1),2(R1),(R8)
	MOVL	R3,R8
	.ENDM
	.PAGE
	INIT	GTVR02
	MOVL	GFPTR,R1
	BSBW	GMOVHOLR		;SET HOLE AT PTR
	MOVL	GOBUFFA,R8
	MOVSP	0			;HOME
	BITB	GSTAT,#GXCTLL
	IF.	*ON			;^L DONE OR FIRST TIME
		BSBW	CLEAR		;CLEAR SCREEN + WINDOW
		TSTL	GFCNT
		IF.	*EQ		;EMPTY BUFFER
			MOVW	#^A'/\',@GSBUFFA
			MOVC3	#FSL,FS,(R8)
			MOVL	R3,R8
		ELSE.
			SUBL3	#900,GFPTR,GOPTR
			IF.	*LTS		;BEFORE START BUFFER
				CLRL	GOPTR
			ENDIF.
			MOVL	#10,R7		;POSITION MID SCREEN
			BSBW	CHKSR		;CALCULATE START
			BSBW	MOVSR		;SET SCREEN BUFFER + TERM
		ENDIF.
	ELSE.					;NOT ^L DONE
		TSTL	GFCNT
		IF.	*EQ			;EMPTY BUFFER
			BITB	#WXCLR,WSTAT
			IF.	*OFF		;NOT CLEAR
				BSBW	CLEAR
			ENDIF.
			MOVW	#^A'/\',@GSBUFFA
			MOVC3	#FSL,FS,(R8)
			MOVL	R3,R8
		ELSE.
			BITB	#GXMORE,GSTAT
			IF.	*ON		;MORE REQUESTED
				BICB2	#GXMORE,GSTAT
				BITB	#WMORE,WSTAT
				IF.	*ON	;MORE PRESENT
					SUBL3	GHCNT,WSEND,GOPTR
				ENDIF.
				BSBW	MOVSR
				BRW	L2
			ENDIF.
			CMPL	GFPTR,GOPTR
			IF.	*LT		;PTR BEFORE WINDOW
L1:				SUBL3	#900,GFPTR,GOPTR
				IF.	*LTS
					CLRL	GOPTR
				ENDIF.
				MOVL	#10,R7
			ELSE.
				SUBL3	GOPTR,GFPTR,R1
				CMPL	R1,#1600
				IF.	*GT	;TOO FAR AHEAD
					BRW	L1
				ENDIF.
				MOVL	#0,R7	;DO NOT REPOSITION SCREEN IF
			ENDIF.
			BSBW	CHKSR		;CHECK START OF OUTPUT
			BSBW	MOVSR		;MOVE SCREEN BUFFER + TERM
		ENDIF.
	ENDIF.
L2:	BSBW	WRITR
	RET
;
;
CLEAR:
	BISB2	#WXCLR,WSTAT
	MOVSP	1				;CLEAR
	BICB2	#WMORE,WSTAT
	MOVC5	#0,(R0),#SPACE,#1600,@GSBUFFA	;WINDOW TO SPACE
	RSB
	.PAGE
;
;	SHIFT THE HOLE IN THE BUFFER
;	IN	GHPTR,GHCNT
;		GFBUFFA,GFCNT
;		R1 = NEW GHPTR
GMOVHOLR:: PUSHR	#^M<R6,R7,R8,R9>
	CMPL	R1,GHPTR
	IF.	*LT				;SHIFT HOLE LEFT
		ADDL3	GHPTR,GFBUFFA,R6	;FROM ADDR
		ADDL3	GHCNT,R6,R7		;TO ADDR
		SUBL3	R1,GHPTR,R8		;LENGTH TO SHIFT
		MOVL	R1,GHPTR		;NEW PTR
MOVH1:		CMPL	R8,GHCNT
		IF.	*GT			;CAN NOT IN 1*
			SUBL2	GHCNT,R6
			SUBL2	GHCNT,R7
			SUBL2	GHCNT,R8
			MOVC3	GHCNT,(R6),(R7)
			BRW	MOVH1
		ENDIF.
		SUBL2	R8,R6
		SUBL2	R8,R7
		MOVC3	R8,(R6),(R7)
	ELSE.						;NO SHIF LEFT
		IF.	*NE				;SHIFT HOLE RIGHT
			ADDL3	GHPTR,GFBUFFA,R3	;TO ADDR
			SUBL3	GHPTR,R1,R8		;LENGTH TO SHIFT
			MOVL	R1,GHPTR		;NEW PTR
			ADDL3	GHCNT,R3,R1		;FROM ADDR
MOVH2:			CMPL	R8,G64K
			IF.	*GT			;CAN NOT IN 1*
				MOVC3	G64K,(R1),(R3)
				SUBL2	G64K,R8
				BRW	MOVH2
			ENDIF.
			MOVC3	R8,(R1),(R3)
		ENDIF.
	ENDIF.
	POPR	#^M<R6,R7,R8,R9>
	RSB
	.PAGE
;
;	INCREASE SIZE OF HOLE IN BUFFER
;		IN	GHPTR,GHCNT
;			GFBUFFA,GFCNT
;			R1 = NR OF BYTES TO INCREMENT
;
GEXTHOLR:: PUSHR	#^M<R6,R7,R8,R9>
	ADDL3	GHPTR,GFBUFFA,R8
	ADDL2	GHCNT,R8		;END OF HOLE
	ADDL3	GFCNT,GFBUFFA,R6
	ADDL2	GHCNT,R6		;END OF BUFFER = FROM
	SUBL3	R8,R6,R8		;LENGTH PART AFTER HOLE
	ADDL3	R1,R6,R7		;TO ADDR
	SUBL3	GFBUFFA,R7,R0
	CMPL	R0,#GBUFS*512-2
	IF.	*GT			;BUFFER EXCEEDED
		MOVW	#11,GERRN
		RET
	ENDIF.
	ADDL2	R1,GHCNT
	MOVL	R1,R9
EXTH1:	CMPL	R8,R9
	IF.	*GT			;CAN NOT IN 1*
		SUBL2	R9,R8
EXTH2:		CMPL	R9,G64K
		IF.	*GT		;TOO BIG
			SUBL2	G64K,R6
			SUBL2	G64K,R7
			SUBL2	G64K,R9
			MOVC3	G64K,(R6),(R7)
			BRW	EXTH2
		ENDIF.
		SUBL2	R9,R6
		SUBL2	R9,R7
		MOVC3	R9,(R6),(R7)
		BRW	EXTH1
	ENDIF.
EXTH3:	CMPL	R8,G64K
	IF.	*GT
		SUBL2	G64K,R6
		SUBL2	G64K,R7
		SUBL2	G64K,R8
		MOVC3	G64K,(R6),(R7)
		BRW	EXTH3
	ENDIF.
	SUBL2	R8,R6
	SUBL2	R8,R7
	MOVC3	R8,(R6),(R7)
	POPR	#^M<R6,R7,R8,R9>
	RSB
	.PAGE
;
;	MOVE OUTPUT TO SCREEN BUFFER AND TO SCREEN
;
MOVSR:
	BICB2	#WXCLR,WSTAT
	ADDL3	GOPTR,GFBUFFA,R6
	MOVL	GSBUFFA,R7
	SUBL3	GOPTR,GFPTR,R0
	IF.	*LTS			;PASSED /\ AND HOLE
		MOVW	#-1,WPTR
		ADDL2	GHCNT,R6
	ELSE.
		MOVW	R0,WPTR		;SET REL SCR /\
	ENDIF.
	CLRB	WSW
	CLRW	WTAB2			;INDICATE CURSOR POSITION
	ADDL3	GFCNT,GFBUFFA,R1
	ADDL2	GHCNT,R1
	MOVB	#255,(R1)		;INDICATE END FOR GOOD DISPLAY
	MOVL	R1,WFEND		;SAVE END OF BUFFER
	MOVL	#20,WLOOP
MOVS1:	MOVAB	80(R7),WNXTWA		;SET ADDR NEXT WINDOW LINE
	BSBW	GLINR
	BSBW	MOVLR			;GENERATE + UPDATE
	ADDL3	#1024,GOBUFFA,R1
	CMPL	R8,R1
	IF.	*GE			;TOO MUCH OUTPUT
		SUBL3	GOBUFFA,R8,R1	;LENGTH SO FAR
		BSBW	GWRITR
		MOVL	GOBUFFA,R8	;START OF OUTPUT BUFFER
	ENDIF.
	MOVB	#LF,(R8)+
	CMPL	WLOOP,#11
	IF.	*EQ			;MID SCREEN
		SUBL3	GFBUFFA,R6,GMIDPTR
		TSTW	WPTR
		IF.	*LTS		;PASSED HOLE
			SUBL2	GHCNT,GMIDPTR
		ENDIF.
	ENDIF.
	SOBGTR	WLOOP,MOVS1
MOVS2:
	SUBL3	GFBUFFA,R6,WSEND	;END OF DISPLAYED INFO
	RSB
WLOOP:	.BLKL
WNXTWA:	.BLKL	1			;ADDR OF NEXT WINDOW LINE
WFEND:	.BLKL
	.PAGE
;
;	CHECK OFFSET OF SCREEN PTR FROM OUT START
;	IN	GOPTR
;		GFPTR
;		R7 = NR OF WINDOW LINES -10 AFTER WHICH REPOSITION OCCURS
;	OUT	GOPTR UPDATED IF NEED BE
;
CHKSR:
	ADDL3	GOPTR,GFBUFFA,R6
	SUBL3	GOPTR,GFPTR,WTSCL	;TOTAL LL TOO SCAN
CHKS1:
	MOVL	R6,WLTAB[R7]		;START OF WINDOW LINE
	MOVW	#8,WSCL
	MOVL	#10,WLOOP
CHKS2:	CMPW	WSCL,WTSCL
	IF.	*LT
		MOVW	WSCL,WSCLM
	ELSE.				;WSCLM=MIN( WSCL,WTSCL )
		MOVW	WTSCL,WSCLM
	ENDIF.
	SCANC	WSCLM,(R6),GSCT,#1
	IF.	*NE			;HT OR CR FOUND
		SUBW2	R0,WSCLM
		SUBW2	WSCLM,WTSCL
		DECW	WTSCL
		ADDL3	#1,R1,R6
		CMPB	(R1),#GCRX
		IF.	*EQ		;END OF LINE  DETECTED
			BRW	CHKS3
		ENDIF.
	ELSE.
		SUBW2	WSCLM,WTSCL
		IF.	*LES		;WE ARE THERE
			BRW	CHKS4
		ENDIF.
		MOVL	R1,R6
	ENDIF.
	CMPL	WLOOP,#1
	IF.	*EQ			;LAST PART OF WINDOW LINE
		MOVW	#7,WSCL
	ENDIF.
	DECL	WLOOP
	IF.	*NE			;NOT END OF LOOP
		BRW	CHKS2
	ENDIF.
	CMPB	(R6),#GCRX
	IF.	*EQ			;END OF LINE  IN POS 80
		INCL	R6
		DECW	WTSCL
	ELSE.
		CMPB	1(R6),#GCRX
		IF.	*EQ		;END OF LINE  IN POS 81
			CMPB	#32,(R6)
			IF.	*LE		;80  DISPLAY
				ADDL2	#2,R6
				SUBW2	#2,WTSCL
			ENDIF.
		ENDIF.
	ENDIF.
CHKS3:	TSTW	WTSCL
	IF.	*LTS
		BRW	CHKS4
	ENDIF.
	INCL	R7
	CMPL	R7,#20
	IF.	*EQ			;END OF WINDOW REACHED
		MOVC3	#40,WLTAB+40,WLTAB+36
		DECL	R7
		SUBL3	GFBUFFA,WLTAB+40,GOPTR
	ENDIF.
	BRW	CHKS1
CHKS4:
	RSB
WLN:	.BLKL				;NR OF LINES ON WINDOW BEFORE PTR
WLTAB:	.BLKL	20			;TABLE OF BUFFER START ADDR S
WTSCL:	.BLKL				;TOTAL LL TO PTR
WSCLM:	.BLKL				;LL TO SCAN
	RSB
	.PAGE
;
;
;	MOVE ONE TERMINAL LINE TO WINDOW AND TERMINAL
;	IN	WLIN = 80 BYTES NO TABS
;		WTAB2 = NR OF TABS ON TERMINAL
;		R7 = WINDOW PTR
;	SEND ONLY BYTES TO TERMINAL THAT DIFFER
;
MOVLR:	PUSHR	#^M<R6>
	MOVAB	WLIN,R6
	MOVL	#10,WMLP		;10 * 8 BYTES
	CLRW	WTAB
MOVL1:	CMPC3	#8,(R6),(R7)
	IF.	*EQ			;OLD WINDOW = NEW WINDOW
		ADDL2	#8,R6
		ADDL2	#8,R7
		INCW	WTAB
		SOBGTR	WMLP,MOVL1
		BSBW	DONC		;TEST DISPLAY ON
		BRW	MOVLX		;EXIT
	ENDIF.
	CMPW	WTAB,WTAB2
	IF.	*NE			;NOT AT CORRECT POSITION
		CMPW	WTAB,WTAB2
		IF.	*LT		;GONE TOO FAR ON TERM
			MOVB	#CR,(R8)+
			CLRW	WTAB2
		ELSE.
			BSBW	DONC
		ENDIF.
		SUBW3	WTAB2,WTAB,R0
		MOVC3	R0,WHT,(R8)
		MOVL	R3,R8
		MOVW	WTAB,WTAB2	;SET TABS ON SCREEN
	ENDIF.
	ASHL	#3,WMLP,WMOV
	SKPC	#SPACE,WMOV,(R6)
	IF.	*EQ			;ALL SPACES
		BSBW	DONC
		BITB	GSTAT,#GXCTLL
		IF.	*OFF		;NOT ^L DONE
			MOVSP	2	;ERASE TO END OF LINE
			MOVC5	#0,(R0),#SPACE,WMOV,(R7)
		ENDIF.
		ADDL2	WMOV,R7
		BRW	MOVLX
	ENDIF.
	MOVL	(R6)+,(R7)+
	ADDL2	#4,R7
	BSBW	MOV4R
	CMPL	(R6)+,-4(R7)
	IF.	*NE
		MOVL	-4(R6),-4(R7)
		BSBW	MOV4R
	ELSE.
		BITB	#GXHP,GSTAT2
		IF.	*ON			;HP
			BITB	#WXON,WSW
			IF.	*ON		;DISPLAY ON
				BSBW	MOV1R	;MOVE 4 BYTES
			ELSE.
				MOVB	#HT,(R8)+
			ENDIF.
		ELSE.
			MOVB	#HT,(R8)+
		ENDIF.
	ENDIF.
	INCW	WTAB
	INCW	WTAB2
	DECL	WMLP
	IF.	*NE
		BRW	MOVL1
	ENDIF.
	CMPB	#HT,-1(R8)
	IF.	*EQ			;HT MUST NOT AT END OF LINE
		DECL	R8
	ENDIF.
	BITB	#GXHP,GSTAT2
	IF.	*ON			;HP
		BITB	#WXON,WSW
		IF.	*ON		;STILL DISPLAY ON
			DECL	R8
			MOVW	ESCOFF,(R8)+
			MOVB	-1(R7),(R8)+
			BICB2	#WXON,WSW
		ENDIF.
	ENDIF.
MOVLX:	POPR	#^M<R6>
	RSB
;
MOV4R:
	BITB	#GXHP,GSTAT2
	IF.	*ON
		BITB	#WXON,WSW
		IF.	*OFF			;NOT DISPLAY ON
			SCANC	#4,-4(R6),GSCT,#4
			IF.	*NE		;SOME NON DISPLAYABLE FOUND
				BISB2	#WXON,WSW
				MOVW	ESCY,(R8)+
				SUBL3	#1,WMLP,R0
				ASHL	#3,R0,R0
				MOVC5	#0,(R0),#SPACE,R0,(R7) ;CLEAR WINDOW LINE
			ENDIF.
		ENDIF.
		BSBW	MOV1R
	ELSE.
		SUBL2	#4,R6
		MOVL	#4,R0
MOV4.1:		CMPB	(R6),#^A' '
		IF.	*LT
			MOVB	GNONDIS,(R8)+
			INCL	R6
		ELSE.
			MOVB	(R6)+,(R8)+
		ENDIF.
		SOBGTR	R0,MOV4.1
	ENDIF.
	RSB
;
MOV1R:					;MOVE 4 BYTES
	LOCC	#CR,#4,-4(R6)
	IF.	*EQ			;NO CR
		MOVL	-4(R6),(R8)+
	ELSE.				;CR DETECTED
		MOVL	#4,R0
		MOVAB	-4(R6),R1
MOV101:		CMPB	#CR,(R1)
		IF.	*EQ		;CR DETECTED
			MOVB	(R1)+,(R8)+
			MOVW	ESCOFF,(R8)+
			MOVW	ESCOFF,@WNXTWA	;ALSO TO WINDOW
			MOVL	ESCPOS,(R8)+
			MOVW	ESCPOS+4,(R8)+
			PUSHR	#^M<R0,R1>
			MOVAB	WLIN,R0
			SUBL2	R0,R1
			EDIT	R1,2,(R8)	;COL POSITION
			ADDL2	#2,R8
			MOVB	#^A'C',(R8)+
			MOVW	ESCY,(R8)+
			POPR	#^M<R0,R1>
		ELSE.
			MOVB	(R1)+,(R8)+
		ENDIF.
		SOBGTR	R0,MOV101
	ENDIF.
	RSB
ESCPOS:	.BYTE	27
	.ASCII	/&a-1r/
;
DONC:					;TEST IF DISPLAY FUNCTIONS ON
	BITB	#GXHP,GSTAT2
	IF.	*ON
		BITB	#WXON,WSW
		IF.	*ON		;DISPALY ON
			BICB2	#WXON,WSW
			MOVC3	#6,ESCOFF,(R8)
			MOVL	R3,R8
		ENDIF.
	ENDIF.
	RSB
;
WHT:	.REPEAT	20
	.BYTE	HT
	.ENDR
WMOV:	.BLKL
WMLP:	.BLKL
WLIN:	.BLKB	84
WTAB:	.BLKW
WTAB2:	.BLKW
ESCY:	.BYTE	27,^A/Y/
ESCOFF:	.BYTE	27,^A'Z',8,8,27,^A'K'
	.PAGE
;	GENERATE ONE LINE FOR SCREEN WINDOW
;	IN	R6 = BUFFER PTR
;		WPTR = HL2 - REL POS FROM R6 FOR /\
;		WSW = STATUS
;	OUT	R6,WPTR   UPDATED
;		WLIN = BUFFER FOR NEW WINDOW LINE
;
GLINR:	PUSHR	#^M<R7>
	MOVL	#10,WGLP
	MOVAB	WLIN,R7
	MOVB	#SPACE,WLIN+79
	BITB	#WXP1,WSW
	IF.	*ON			;\ FROM PREVIOUS TIME
		BICB2	#WXP1,WSW
		MOVB	#^A'\',(R7)+
		MOVW	#7,WSCL
		MOVW	#79,WLINL
	ELSE.
		MOVW	#8,WSCL
		MOVW	#80,WLINL
	ENDIF.
GLIN1:	CMPW	WPTR,WSCL
	IF.	*LT			;PTR IN THESE WSCL BYTES
		SCANC	WPTR,(R6),GSCT,#1
		IF.	*NE		;HT OR CR FOUND
			SUBW3	R0,WPTR,R0
			SUBW2	R0,WPTR
			DECW	WPTR	;ADJUST /\ PTR
			CMPB	(R1),#HT
			IF.	*EQ
				MOVC5	R0,(R6),#SPACE,WSCL,(R7)
				INCL	R1
				MOVL	R1,R6
				MOVL	R3,R7
				SUBW2	WSCL,WLINL
			ELSE.		;CR FOUND
				MOVC5	R0,(R6),#SPACE,WLINL,(R7)
				ADDL3	#1,R1,R6
				BRW	GLINX
			ENDIF.
		ELSE.			;FOUND PLACE TO INSERT /\
			MOVC3	WPTR,(R6),(R7)
			MOVW	#^A'/\',(R3)+
			MOVL	R1,R6
			MOVL	R3,R7
			ADDW2	#2,WPTR
			SUBW2	WPTR,WSCL
			SUBW2	WPTR,WLINL
			ADDL2	GHCNT,R6	;SKIP THE HOLE
			MOVW	#-1,WPTR
			TSTW	WSCL
			IF.	*LTS		;OVERFLOW \
				MOVW	#7,WSCL
			ELSE.
				IF.	*GT	;8 BYTES NOT FULL
					BRW	GLIN2
				ELSE.
					MOVW	#8,WSCL
				ENDIF.
			ENDIF.
		ENDIF.
	ELSE.				;NO PTR TO INSERT
GLIN2:		SCANC	WSCL,(R6),GSCT,#1
		IF.	*NE		;HT,CR OR END FOUND
			SUBW3	R0,WSCL,R0
			SUBW2	R0,WPTR
			DECW	WPTR
			CMPB	(R1),#HT
			IF.	*EQ	;HT FOUND
				MOVC5	R0,(R6),#SPACE,WSCL,(R7)
				ADDL3	#1,R1,R6
				MOVL	R3,R7
				SUBW2	WSCL,WLINL
			ELSE.
				CMPB	(R1),#GCRX
				IF.	*EQ		;CR FOUND
					MOVC5	R0,(R6),#SPACE,WLINL,(R7)
					ADDL3	#1,R1,R6
				ELSE.			;END OF BUFFER
					MOVC5	R0,(R6),#SPACE,WLINL,(R7)
					CMPL	R1,WFEND
					IF.	*NE	;NOT AT END
						SUBL3	R6,R1,R0
						INCL	R0
						SUBW2	R0,WSCL
						SUBW2	R0,WLINL
						ADDL2	R0,R7
						MOVL	R1,R6
						INCL	R6
						DECW	WSCL
						BRW	GLIN2
					ENDIF.
					MOVL	R1,R6
				ENDIF.
				BRW	GLINX
			ENDIF.
		ELSE.			;NO SPECIAL ACTION
			MOVC3	WSCL,(R6),(R7)
			MOVL	R1,R6
			MOVL	R3,R7
			SUBW2	WSCL,WPTR	;ADJUST /\ PTR
			SUBW2	WSCL,WLINL
		ENDIF.
		MOVW	#8,WSCL		;NEXT SCAN 8 BYTES
	ENDIF.
	DECL	WGLP
	IF.	*EQ		;END OF WINDOW LINE REACHED
		CMPB	#GCRX,(R6)
		IF.	*EQ		;CR IN POS 80
			TSTW	WPTR
			IF.	*NE		;NOT AT PTR POSITION
				CMPB	WLIN+79,#^A'\'
				IF.	*NE	;NOT PTR AT END THIS LINE
					DECW	WPTR
					INCL	R6	;SKIP END OF LINE
					BRW	GLINX
				ENDIF.
			ENDIF.
			DECL	R7
			BISB2	#WXP1,WSW
		ELSE.
			CMPB	WLIN+79,#^A'\'
			IF.	*EQ		;OVERFLOW \
				DECL	R7
				BISB2	#WXP1,WSW
			ELSE.
				CMPB	1(R6),#GCRX
				IF.	*EQ	;CR IN POS 81
					CMPW	#1,WPTR
					IF.	*LT	;NOT /\ AT END
						CMPB	#SPACE,(R6)
						IF.	*LE	;DISPLAYABLE
							MOVB	(R6)+,(R7)+
							INCL	R6
							SUBW2	#2,WPTR
							BRW	GLINX
						ENDIF.
					ENDIF.
				ENDIF.
			ENDIF.
		ENDIF.
		MOVB	#^A'!',(R7)+
	ELSE.
		CMPL	WGLP,#1
		IF.	*EQ		;LAST 8 POS IN WINDOW LINE
			DECW	WSCL
		ENDIF.
		BRW	GLIN1
	ENDIF.
GLINX:	POPR	#^M<R7>
	RSB
WGLP:	.BLKL
CR=13
LF=10
HT=9
SPACE=32
WPTR:	.BLKW
WLINL:	.BLKW
WSCL:	.BLKW
WSW:	.BLKB
WXP1=^X80				;\ OVERFLOW OCCURRED
WXON=^X40				;DISPLAY FUNCTIONS ON HP
	.PAGE
;
;	WRITE OUTPUT TO TERMINAL
;	IN	GOBUFFA = ADDR OUTPUT
;		R8 = END OF OUTPUT
;
WRITR:
	MOVB	#CR,(R8)+
	TSTL	GFCNT
	IF.	*EQ			;EMPTY
		MOVL	GHCNT,WSEND
	ENDIF.
	ADDL3	GFCNT,GHCNT,R1
	CMPL	WSEND,R1
	IF.	*GE			;END OF BUFFER ON SCREEN
		BITB	#WMORE,WSTAT
		IF.	*ON
			BICB2	#WMORE,WSTAT
			MOVSP	2	;CLEAR TO END OF LINE
			MOVW	CRLF,(R8)+
		ELSE.
			MOVB	#LF,(R8)+
		ENDIF.
	ELSE.
		BITB	#WMORE,WSTAT
		IF.	*ON
			MOVB	#LF,(R8)+
		ELSE.
			BISB2	#WMORE,WSTAT
			MOVC3	#WML,WM,(R8)
			MOVL	R3,R8
		ENDIF.
	ENDIF.
	MOVB	#^A/*/,(R8)+
	MOVSP	1			;CLEAR
	SUBL3	GOBUFFA,R8,R1		;OUTPUT LENGTH
	TSTW	GERRN
	IF.	*NE			;ERROR PRESENT
		CALLS	#0,GTVR07
		CLRW	GERRN
	ENDIF.
	BSBW	GWRITR			;SEND TO TERMINAL
	BICB2	#GXCTLL,GSTAT
	RSB
;
;
FS:	
	.ASCII	[/\[
	.BYTE	13,10,10,10,10,10,10,10,10,10,10
	.BYTE	10,10,10,10,10,10,10,10,10,10
FSL=.-FS
CRLF:	.BYTE	13,10
WSTAT:	.BYTE	0
WMORE=^X80				;MORE ON TERMINAL
WXCLR=^X40				;WINDOW + TERM CLEAR
WM:	.ASCII	/--MORE--/
	.BYTE	13,10
WML=.-WM
WSEND:	.LONG	0
	.END