Bit Image Graphics Mode - Star Micronics gemini-10X User Manual

3-5 Bit Image Graphics Mode
Besides the functions for printing character patterns, Gemini-lOX is provided
another function for printing dots on the printer at desired positions and
forming by collection of these dots, desired image or pattern.
Gemini-lOX printer can produce the four bit image graphics modes, as shown
below, with control codes.
Type of Bit Image
Control Code
Density
Graphics Mode
Normal-density ESC
K
nl n2 rol
m2
60 dots per inch
Dual-density ESC
L nl nZ ro] roz
120 dots per inch
Dual-density
ESC y nl n2
m] ro2
120 dots per inch
with Double Speed
Quadruple-density ESC
z
n] n2 ro] ro2
240 dots per inch
**
How to Obtain n] and n2
**
It is necessary to send the number of data by "n] n2" in decimal numbers
(or hexadecimal numbers) following the "ESC K", "ESC L", "ESC y" or "ESC
z".
The number of columns to be printed is given by n] + 256*n2'
The maximun number of columns is shown below.
Type of Bit Image
Graphics Mode
Normal-density
Dual-density
Dual-density
with Double Speed
Quadruple-density
Maximum Number
of Columns
480
960
960
1,920
In the Normal-density Mode, the maximum number of columns is 480.
Therefore, the value of "nl + 256*n2" specified in excess of 480 dot
positions are ignored and printing of the graphic data after 480th dot
position is not guaranteed.
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