Epson Commands
PcOS Series 80PLUS
Programmer's Guide
Command Descriptions
Page 88
Rev B 4/13/99
Bit-Image Commands
Function
Select bit-image mode
[EA]
ASCII
ESC
*
m
nL
nH
d1 ... k
Hexadecimal
1BH
2AH
m
nL
nH
d1 ... k
Decimal
<
27>
<42>
m
nL
nH
d1 ... k
Range
m
= 0, 1, 32, 33
0
≤
nL
≤
255
0
≤
nH
≤
3
0
≤
d
≤
255
Description
This command selects a bit-image mode using
m
for the number of dots
specified by
nL
and
nH
, as follows.
Vertical Direction
Horizontal Direction
m
Mode
Number of
Dots
Density
(dpi)
Density
(dpi)
Amount of Data (K)
0
8-dot single-density
8
68
102
nL + nH × 256
1
8-dot double-density
8
68
203
nL + nH × 256
32
24-dot single-density
24
203
102
(nL + nH × 256) × 3
33
24-dot double-density
24
203
203
(nL + nH × 256) × 3
The
nL
and
nH
indicate the number of dots of the bit image in the
horizontal direction. The number of dots is calculated by
nL
+
nH
× 256.
If the bit-image data input exceeds the number of dots to be printed on a
line, the excess data is ignored.
d
indicates the bit-image data. Set a corresponding bit to 1 to print a dot or
to 0 to not print a dot.
8-dot single-density mode representation is depicted below:
Top of bit-image
d1
d2
d3
d4
....
....
....
....
....
dn
dn
MSB
→
LSB