Oki Microline 3390 User Manual page 165

bit number of the graphic byte
7 (MSB)
6
5
4
3
2
1
0 (LSB)
The initiating command sequence for printing the graphic determi-
nes one of the four resolutions.
When the aspect ratio 1:1 is chosen, the assignment of the bits of a
graphic byte to the pins of the print head depends on the resolution
selected.
Graphics of single density with a aspect ratio of 1:1 have a resoluti-
on of 60 x 60 dots per inch. The assignment of bits of a graphic byte
to the pins of the print head is shown in the following table.
bit number of the graphic byte
7 (MSB)
6
5
4
3
2
1
0 (LSB)
Graphics of double density with normal or half speed at a aspect
ratio of 1:1 have a resolution of 120 x 60 dots per inch. At this resolu-
tion, only 12 of the 24 pins of the print head are used per graphic
byte.
In order to increase the throughput, the printer, under certain con-
ditions, prints two graphic lines in one pass if this is possible.
The following table shows the assignment of pins when printing
out a two-line graphic of double density in one pass.
assigned printer pins
01 to 03
03 to 05
06 to 08
08 to 10
11 to 13
13 to 15
16 to 18
18 to 20
assigned printer pins
01 to 03
04 to 06
09 to 09
10 to 12
13 to 15
16 to 18
19 to 21
22 to 24
Chapter 11: IBM - Graphics
Aspect ratio 1:1
11-11