Epson 4100 manual 234, Quad-Density Graphics

234	IBM Proprinter Control Commands
	ESC Z					Quad-Density Graphics
	ASCII:	ESC	Z	(n1)	(n2)	(d1)...(d3264)
	Control:	CTRL [	Z	(n1)	(n2)	(d1)...(d3264)
	Decimal:	27	90	(n1)	(n2)	(d1)...(d3264)
	Hexadecimal:	1B	5A	(n1)	(n2)	(d1)...(d3264)

Causes the printer to print quadruple-density graphics. Quadruple-density graphics are printed in synthesized 240 dot columns per horizontal in. The maximum number of dot columns that can be reserved per line in quad density graphics is 3264.

The printer prints half as many dot columns as it receives. Adjacent columns are paired, and if corresponding bits in either dot column are set, a pin is fired to create a dot.

The arguments for quad-density graphics are the same as the Single- Density Graphics command (ESC K).

Example

REM PRINT 2 SOLID BARS 150 DOT PATTERNS IN

REM LENGTH USING QUAD DENSITY GRAPHICS

FOR I = 1 TO 2

LPRINT CHR$(27);"Z";CHR$(150);CHR$(0);

FOR J = 1 TO 150

LPRINT CHR$(255);

NEXT J

LPRINT

NEXT I

END