Printek Emulation
103
amount of graphics data that you specify, because the printer will not leave graphics mode until it has
accepted the specified number of data bytes.
If “Data Bits” is set to “7” in the interface setup menu, beware of potential problems in graphics mode.
Since the MSB (most significant bit) will always be turned off, it will not be possible to fire the top
wire of the print head. Worse yet, the value of
n1
or
n2
may be changed. For example, if
n2
specifies
200 bytes of data, and its MSB is turned off, the printer will only expect 72 bytes of data. It will exit
graphics mode, and then try to print the remaining 128 bytes of graphics data as normal text characters.
The result will surely not be pretty. To avoid such problems, the use of an 8-bit I/O interface for
printing graphics is highly recommended.
The normal graphics modes allow every dot to be printed. High speed graphics will print twice as fast,
but will not allow consecutive dots to be printed.
m DPI Graphics
ESC * m n1 n2 data
Selects eight wire graphics of density
m
as listed in the following table for
(
n1
x 256) +
n2
columns of
data.
m
Density _______
6
240 dpi
7
240 dpi high speed
8
180 dpi
9
180 dpi high speed
10
144 dpi
11
144 dpi high speed
12
120 dpi
13
120 dpi high speed
14
102.86 dpi
15
102.86 dpi high speed
16
90 dpi
17
90 dpi high speed
18
80 dpi
19
80 dpi high speed
20
72 dpi
21
72 dpi high speed
22
65.45 dpi
23
65.45 dpi high speed
24
60 dpi
25
60 dpi high speed
NOTE: Horizontal movement of the printer's print head is measured in intervals of 1/720 of an inch.
Every supported graphics density above is an integral multiple of this resolution. For example, at 60
dpi, dots may be printed every 12/720 of an inch.
Example: The following escape sequence will print four bytes of graphics data at 72 x 72 dpi. The
resulting figure will resemble a square, since the horizontal and vertical density are the same. If some
other density is chosen, the figure will resemble a rectangle.
Escape Sequence:
ESC
*
20
0
4
<
<
<
<
Hexadecimal:
1B
2A
14
00
04
3C
3C
3C
3C
m DPI Graphics
ESC # m n1 n2 data
Selects eight wire graphics of density
m
as listed in the following table for
(
n1
x 256) +
n2
columns of
data.
Summary of Contents for FormsMaster 8000
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Page 89: ...DEC LA120 Emulation 83 VT Vertical Tab VTS Set Vertical Tab Stop...
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Page 140: ...ASCII Character Tables 134 Epson FX Fast Draft Epson FX Draft Epson FX Letter Quality...
Page 141: ...ASCII Character Tables 135 PC Fast Draft PC Draft PC Letter Quality...
Page 142: ...ASCII Character Tables 136 EBCDIC Fast Draft EBCDIC Draft EBCDIC Letter Quality...
Page 144: ...ASCII Character Tables 138 OCR A OCR B...
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