;
;
; DBLGEN.ASM
; DBL4.COM OVERLAY
; GENERALIZED PRINTER
;
; VERSION OF SEPT. 6, 1985
; BY: ALAN W WARREN
;-------------------------------;

	ORG	0100H
	DS	3		;JUMP VECTOR SPACE
;
;PRINTER ID STRING
; TERMINATE WITH ZERO
;-------------------------------;

	DS	123H-$		;32 BYTES FOR STRING
;
;
;PRINTER CONTROL STRINGS:
; FIRST BYTE TELLS HOW MANY
; BYTES ARE TO BE SENT TO PRINTER
;	START ADDRESS = 123H
;-------------------------------;

ENDPG:	DB	1,12		;STRING TO PRODUCE FORM FEED
	DS	130H-$		;13 BYTES AVAILABLE

NORMAL:	DB	0		;RESET PRINTER TO NORMAL
	DS	140H-$		;16 BYTES AVAILABLE
;
;
;MODE CONTROL BLOCKS
;
; MODE ID STRINGS	32 BYTES	TERMINATES WITH ZERO,
;					LEAD ZERO DISABLES MODE
; PRINT MODE CONTROL	24 BYTES	TERMINATES WITH ZERO
; PAGE FORMAT CONSTANTS	 8 BYTES
;			--------
; TOTALS:		64 BYTES
;-------------------------------;

MODE1:	DB	'10 CPI '
	DB	'& 6 LPI',0	;LAST CHARACTER IN STRING IS ZERO
	DS	160H-$		;32 BYTES AVAILABLE

;
;24 BYTES FOR PRINT MODE CONTROL
;-------------------------------;

	DB	0		;LEAD BYTE TELLS STRING LENGTH
	DS	178H-$		;24 BYTES AVAILABLE
;
;8 BYTES FOR PAGE LAYOUT
;-------------------------------;

	DB	66		;PAGE HEIGHT IN LINES
	DB	85		;PAGE WIDTH IN CHARACTERS
	DB	8		;LEFT MARGIN IN CHARACTERS
	DB	4		;RIGHT MARGIN IN CHARACTERS
	DB	4		;CENTER GAP IN CHARACTERS
	DB	0		;TOP MARGIN IN LINES
	DB	6		;BOTTOM MARGIN IN LINES		
	DB	0		;FILLS UP 8 BYTES
;
;MORE OF SAME FOR 2ND MODE
; (ADDRESS SHOULD BE 180)
;-------------------------------;

MODE2:	DB	0		;FIRST CHARACTER MUST BE ZERO
				;IF MODE IS NOT IN USE
	DS	63		;64 BYTES TOTAL
;
;
;SAME FOR 3RD, 4TH, 5TH, 6TH & 7TH
;-------------------------------;

MODE3:	DB	0		;ADDRESS = 1C0H
	DS	63		;64 BYTES TOTAL
;
MODE4:	DB	0		;ADDRESS = 200H
	DS	63		;64 BYTES TOTAL
;
MODE5:	DB	0		;ADDRESS = 240H
	DS	63		;64 BYTES TOTAL
;
MODE6:	DB	0		;ADDRESS = 280H
	DS	63		;64 BYTES TOTAL
;
MODE7:	DB	0		;ADDRESS = 2C0H
	DS	63		;64 BYTES TOTAL

	END			;300H = NEXT ADDRESS