Chapter 7: Graphics Commands for 24-Pin Printers 63Graphics Select/Print Command (IBM AGM/E) ML390 Turbo, ML391 Turbo ML590, ML591Function ASCII Dec HexGraphics Select/Print ESC * m n 1 n 2 [data] 27 42 m n 1 n 2 [data] 1B 2A m n 1 n 2 [data]Note: The IBM AGM emulation combines the IBM Proprinter emulation with Epson LQgraphics for special graphics applications.This command is used to select the density, to designate the number of columns of data you'llbe sending, and to specify the data to be sent.Parameter mThis parameter specifies which density to use when printing the graphic image. The tablebelow indicates the type of density for each value of m.Table 40: Epson ESC * m Command —8-Pin Graphics Density Codes for m Values (24-Pin Printers)Value of m Graphics Type PinsHorizontal Density(dots per inch)0 Single Density 8 60 dpi1 Double Density 8 120 dpi2 High Speed Double Density 8 120 dpi*3 Quadruple Density 8 240 dpi*4 CRT I 8 80 dpi6 CRT II 8 90 dpi32 Single Density 24 60 dpi33 Double Density 24 120 dpi38 CRT III 24 90 dpi39 Triple Density 24 180 dpi40 Hex Density 24 360 dpi** Extrapolated (quasi density)Parameters Ln and H nThese parameters tell the printer how many columns of data you'll be sending: 8-pin modeshave one byte of data per column, 24-pin modes have three bytes of data per column. Theseparameters can be assigned any value from 0 to 255. To calculate the values, first determinehow many columns of dots there will be in your graphics image. Divide this number by 256and assign the whole number to Hn ; assign the remainder to L n .
