100 
 110 OUTCON,	.-.				/CONSOLE OUTPUT ROUTINE
 120 	JMP I	[CONOUT]		/GO HANDLE IT THERE
 130 
 140 OUTLPT,	.-.				/LPT: OUTPUT ROUTINE
 150 	JMP I	[LPTOUT]		/GO HANDLER IT THERE
 160 
 170 EMPTPTR,.-.				/BUFFER EMPTYING POINTER
 180 EMPTR,	.-.				/TEMPORARY EMPTYING POINTER
 190 FILLPTR,.-.				/BUFFER FILLING POINTER
 200 LSTATUS,0				/LPT: STATUS
 210 
 220 /	THE FOLLOWING WORDS ARE USED BY THE CONSOLE UTILITY CODE TO DETERMINE THE
 230 /	CHECKSUMMED REGION OF THE OVERLAY. DUE TO RESTRICTIONS OF THE UTILITY,
 240 /	THIS REGION MUST BE LOCATED BETWEEN 0000 AND 2577.
 250 
 260 CHKCNT,	CONOFF+1-ENDROM			/CHECKSUM COUNT
 270 CHKPTR,	CONOFF+1			/CHECKSUM POINTER
 280 
 290 /	THE PREVIOUS LOCATIONS ARE AVAILABLE AS TEMPORARIES FOR THE OVERLAY CODE.
 300 
 310 	VTEMP1=	CHKCNT			/TEMPORARY
 320 	VTEMP2=	CHKPTR			/TEMPORARY
 330 
 340 /	THE FOLLOWING ARE LINKAGE POINTERS PROVIDED FOR THE TRAP BLOCK ROUTINES.
 350 
 360 IOTRAP,	JMP I	[OURTRAP]		/GO HANDLE I/O CALLS THERE
 370 ERRTRP,	JMP I	[TRPERR&177+TRPAG2]	/GO HANDLE I/O ERRORS THERE
 380 IOWAIT,	JMP I	[WAITIO&177+TRPAGE]	/GO WAIT FOR I/O TO COMPLETE THERE
 390 	0				/RESERVED FOR ADDITIONAL HANDLER INTERCEPT
 400 
 410 /	THE FOLLOWING WORD IS USED TO INDICATE INITIAL RELOADING OF THE OVERLAY.
 420 /	ANY CLEANUP CAUSED BY RELOADING OF THE OVERLAY IS GOVERNED BY THE
 430 /	VALUE OF THIS WORD. THE TRAP BLOCKS WILL BE RELOADED IF THIS WORD IS -1.
 440 
 450 INITSW,	-1				/FIRST TIME SINCE RELOAD SWITCH
 460 	EJECT
 470 /	THE FOLLOWING LOCATIONS CONTROL THE FLOW OF CURSOR ADDRESSING AND
 480 /	<ESC> SEQUENCE COMMANDS.
 490 
 500 CADDRES,CADNORMAL		/CURSOR ADDRESSING <^N> ROUTINE ADDRESS
 510 SCAPADD,SCAPNORMAL		/<ESC> SEQUENCE ROUTINE ADDRESS
 520 
 530 /	THE FOLLOWING LOCATION CONTROLS THE TAB-IN FOR A CONTINUED LINE AFTER
 540 /	A BLINKING "+" CHARACTER IS INSERTED AT THE BEGINNING OF THE LINE.
 550 
 560 TABCNT,	-50			/TAB-IN COUNT
 570 
 580 /	THE INTERRUPT ROUTINE EXITS HERE.
 590 
 600 INTRET,	.-.			/WILL BE CIF CDF RETURN FIELD
 610 	JMP I	CONINT		/RETURN TO CALLER
 620 
 630 /	THE CONSOLE TURNOFF ROUTINE EXITS HERE.
 640 
 650 OFFRET,	.-.			/WILL BE CIF CDF RETURN FIELD
 660 	JMP I	CONOFF		/RETURN TO CALLER
 670 
 680 /	THE LPT: ROUTINE EXITS HERE.
 690 
 700 LPTRET,	.-.			/WILL BE CIF CDF RETURN FIELD
 710 	JMP I	OUTLPT		/RETURN TO CALLER
 720 
 730 /	THE INPUT ROUTINE RETURNS HERE.
 740 
 750 INRET,	.-.			/WILL BE CIF CDF RETURN FIELD
 760 	JMP I	INCON		/RETURN TO CALLER
 770 
 780 /	THE OUTPUT ROUTINE RETURNS HERE.
 790 
 800 OUTRET,	.-.			/WILL BE CIF CDF RETURN FIELD
 810 	JMP I	OUTCON		/RETURN TO CALLER
 820 
 830 GOFLAG,	.-.			/HARDWARE "GO" FLAG (NO INTERRUPTS ONLY)
 840 OLDCHR,	.-.			/PREVIOUS CONTENTS OF LOCATION WHERE CURSOR IS
 850 OLDPTR,	OLDPTR			/ADDRESS OF CURSED LOCATION
 860 VTLNPTR,.-.			/POINTER TO BEGINNING OF CURRENT LINE IN DISPLAY BUFFER
 870 VTPTR,	.-.			/POINTER TO CURRENT CHARACTER IN DISPLAY BUFFER
 880 VMODE,	.-.			/AUGMENTATION MODE BITS
 890 CURSW,	.-.			/CURSOR ON SWITCH
 900 IOERSW,	0			/I/O ERROR RECOVRY SWITCH
 910 
 920 	ZBLOCK	77-.		/EMPTY SPACE
 930 
 940 ESTATUS,.-.			/ERROR STATUS STORED HERE DURING ERROR RECOVERY
 950 	EJECT
 960 /	THE FOLLOWING ENTRY IS USED FOR ANY HOUSEKEEPING NEEDED BY
 970 /	THE OVERLAY ROUTINES WHEN THE OVERLAY IS REQUESTED TO SHUT DOWN
 980 /	BY VARIOUS PROGRAMS SUCH AS "BIN" ETC., WHICH CAN'T FUNCTION DURING
 990 /	DMA, ETC. CAUSED BY VARIOUS VERSIONS OF THE OVERLAY.
1000 
1010 CONOFF,	.-.			/CONSOLE OFF ROUTINE
1020 	JMP I	[OFFCON]	/HANDLE IT THERE
1030 
1040 /	THE FOLLOWING IS THE SPECIAL ENTRY POINT FOR THE KEYBOARD MONITOR. IT IS
1050 /	DELIBERATELY PLACED WITHIN THE "ROM" AREA (WHICH STARTED ONE WORD AGO)
1060 /	AS A DELIBERATE MEASURE TO CAUSE RELOAD IN CASE THE OVERLAY IS PARTIALLY
1070 /	CLOBBERED, BUT NOT WITHIN THE "ROM" AREA. SHOULD THE MONITOR INITIALIZATION