1 DATECS
DPP-350
Programmer’s manual VER.1.50
18
D
i
are the bit image data. Their number is
n*24
bytes for mode 10h. The compressed data in mode 11h
must give same number of bytes, but after the decompression. The number of data bytes for mode 12h
must be
a*n
(after decompression).
Decompression in modes 11h and 12h is similar to the one used in PCX monochrome graphic mode. If
the 2 most significant bits of the consecutive byte are 1, so the next define a counter of iterations from 0
to 63, and the next byte contains the data that has to be repeated. If at least one of the most significant
bytes is 0, the byte contains data which is directly used. If the data for the printer contains a byte with
two most significant bits 1, it has to be sent as 2 bytes with counter 1.
Data for both modes is sent horizontally, from right to left and from top to bottom. Each byte contains 8
points, the “1”-s are black starting from the most significant bit.
A new mode for printing vertical lines added in version
1.39
.
Code:
[1Bh] + [2Ah] + [18h] + L + n + R
L
Offset (white dots) before the vertical line. From 0 to 255.
n
Vertical line thickness in dots. From 0 to 255.
R
Offset (white dots) after the vertical line. From 0 to 255.
The command prints a vertical black line with thickness
n
and height – the whole height of the line
(including the space between the lines set with commands
ESC 2
,
ESC 3
or
ESC J
). The printer adds
L
dots to the current X coordinate, draws the line and adds
R
dots to the X coordinate after the line. The
purpose of the command is to draw tables independent of the type or of the font of the printed symbols
between the vertical lines.
Starting from version
1.40
two new modes for printing graphics are added.
Code:
[1Bh] + [2Ah] + [13h] + n1 + n2 + a +D
1
+ … +D
k
or
[1Bh] + [2Ah] + [14h] + n1 + n2 + a +D
1
+ … +D
k
n1
Lower part of bytes count in horizontal direction. From 0 to 255.
n2
Higher part of bytes count in horizontal direction. From 0 to 1.
a
Vertical size of the image in dots. From 1 to 24.
For command
ESC * [13h]
data for a bit image with size (
n1+256*n2)*8
dots horizontally and
a
dots
vertically are sent, with data compression (exactly as in command
ECS *
[12h]
). The graphics mode is
single density (203x203 dots/inch).
Data bytes count is
a*(n1+256*n2)
after decompression.
For command
ESC * [14h]
data are without compression like
ESC * [10h]
command.
The commands are added to make printing of graphics in page mode easier – in page mode with page
height more than 2040 dots and print direction 90 or 270 degrees it is not possible to fill the whole page
height using only one of the older commands for compressed graphics (
ESC * [11h]
and
ESC * [12h]
).
30.
Switch’s OFF the printer (
ESC +
)
Code:
[1Вh] + [2Bh]
This command switches OFF the printer as by setting the power switch to OFF.
31.
Selecting/Cancelling
Underline (
ESC -
)
Code:
[1Bh] + [2Dh] + n
An underline is attached to the full character width. It is, however, not attached to the part having been
kipped by horizontal tab command.
An underline is not attached to a 90°- right-turned characters.
The following values of
n
are possible:
0
or
30h
Canceling an underline.
1
or
31h
Specifying an underline for 1-dot width.
2
or
32h
Specifying an underline for 2-dots width.
