Epson 8900 Series manual Raster Graphics Commands, Set Up Graphics Parameters

Raster Graphics Commands

In the Model 880 raster graphics mode, the printer alternates between the left and right printhead pins and uses only the top eight pins of each column. The graphics feature enables you to create drawings by sending dot patterns (in the form of hexadecimal codes) to the printer.

When the printer receives a hexadecimal code from the host computer, it maps the individual code bits to the individual printhead pins.

Set Up Graphics Parameters

Escape sequence:	ESC	[	H	;	B	;	V	q
Hexadecimal:	1B	5B	H	3B	B	5B	V	71

This command sets the horizontal dot density (H) and the vertical line spacing (V) and specifies the number of hexadecimal code bytes (B) to print. The variables H, V, and B are as follows.

qHorizontal dot density (H) — 60, 72, 120, or 144 dpi. The default value is 60 dpi. If the horizontal dot density is omitted, the printer defaults to the last value selected since the last power-up operation.

qNumber of hexadecimal code bytes (B) to print — can be set to any value in the range of 0 to 1958 (for a line width of 13.6 inches and a horizontal dot density of 144 dpi). If this parameter is omitted or set to 0, the printer prints no raster graphics.

qVertical line spacing (V) — N/144 inch, where the range of N is 0 through 255. A value of 0 indicates that no line feed operation is to occur.

TI Model 880 Printer Emulation 4-27