Ithaca ITHERM 280, Programmer'S Manual

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* % 8 %.
#
<format> = byte specifying the format of the graphics data.
0 for raw data
1 for bit wise RLE compression
8 for byte wise RLE compression
254 for difference compression
255 for same as previous scan line data
<data> = the data bytes that define the graphics to be printed.
[ESC] * Set horizontal graphic mode
ASCII [ESC] * <m> <0> <0>
Hexadecimal 1BH 2AH <m> <0> <0>
Decimal
<27> <42> <m> <0> <0>
IPCL none
Description The [ESC] * <m> <0> <0> command selects one of the three graphic
modes specified by <m>. The two bytes after the mode must be zero.
Where <m> 0,2,3,4,5,6,7 Standard Graphic Modes (See ESC *
command documentation in previous section.)
8,9 Not supported
10 104 x 96 dpi 1 horizontal, 1 vertical pass
11 208 x 96 dpi 2 horizontal, 1 vertical pass
12 104 x 192 dpi 1 horizontal, 2 vertical passes
13 208 x 192 dpi 2 horizontal, 2 vertical passes
14,15,16 Not supported
Note 1: Only modes 10 thorough 13 should be selected for horizontal
graphics.
Example
Command Comment
[ESC] * <10> <0> <0> Set resolution to 100x96 dpi.
[ESC] h <1> <9> <0> <eight data bytes> Send 8-bytes red pixels.
[ESC] h <2> <9> <0> <eight data bytes> Send 8-bytes green pixels.
[ESC] h <3> <9> <0> <eight data bytes> Send 8-bytes blue pixels.
LF Send line feed to force print of any buffered data not yet printed.
Note 2: Graphic data is committed to paper when more than 12 dot rows
have been transmitted to the printer. If less than 12 dot rows have been
sent, they are not printed until the line is terminated (i.e. a line feed
command is sent). To make graphics faster to send and smaller to store,
several algorithms are included with the graphic command to compress
the data.