OKI ML3390 01091308*01256402 User Manual
Product codes
01091308*01256402
Chapter 11: IBM - Graphics
11-10
Aspect ratio 5:6
(quasi 8-pin
graphics)
(quasi 8-pin
graphics)
Aspect ratio
Function
Dec.
Hex.
ASCII
Set aspect ratio
27 110 m
1B 6E m
ESC n m
The aspect of 8-pin graphics on a 24-pin dot matrix printer is achie-
ved by grouping individual pins. When doing this, distortion of the
image may occur.
ved by grouping individual pins. When doing this, distortion of the
image may occur.
The command ESC n selects a ratio between the horizontal and ver-
tical resolution, depending on the value m, for the 8-pin graphic
modes ESC K, ESC L, ESC Y and ESC Z. When m = 0 or 1, the ratio is
5:6, when m = 2, it is fixed at 1:1. Values greater than 2 are ignored.
The standard setting is the ratio 5:6, the different graphic modes are
first explained with this ratio and later with the ratio set at 1:1.
tical resolution, depending on the value m, for the 8-pin graphic
modes ESC K, ESC L, ESC Y and ESC Z. When m = 0 or 1, the ratio is
5:6, when m = 2, it is fixed at 1:1. Values greater than 2 are ignored.
The standard setting is the ratio 5:6, the different graphic modes are
first explained with this ratio and later with the ratio set at 1:1.
Graphics of single density, with a reproduction ratio of 5:6, have a
resolution of 60 x 72 dots per inch.
resolution of 60 x 72 dots per inch.
Graphics of double density and half speed, with a reproduction ratio of
5:6, have a quasi resolution of 120 x 72 dots per inch. Dots can be
positioned with a horizontal accuracy of 1/120 inch. Directly adja-
cent dots in the horizontal direction are not printed. If, therefore, a
dot appears in a certain row, no dot may be set in the next column
of the same row. Otherwise, every second dot is ignored. Vertically
adjacent dots are not subject to any restrictions.
5:6, have a quasi resolution of 120 x 72 dots per inch. Dots can be
positioned with a horizontal accuracy of 1/120 inch. Directly adja-
cent dots in the horizontal direction are not printed. If, therefore, a
dot appears in a certain row, no dot may be set in the next column
of the same row. Otherwise, every second dot is ignored. Vertically
adjacent dots are not subject to any restrictions.
Graphics of quadruple density, with a reproduction ratio of 5:6, have
a quasi resolution of 240 x 72 dots per inch. In this density, dot co-
lumns overlap by 3/4 of the width of a dot whereby only every
second dot in a row can be printed. If a dot appears in a certain row
and a dot is likewise set in the next column of the same row, this is
not printed. Vertically adjacent dots are not subject to any restric-
tions.
a quasi resolution of 240 x 72 dots per inch. In this density, dot co-
lumns overlap by 3/4 of the width of a dot whereby only every
second dot in a row can be printed. If a dot appears in a certain row
and a dot is likewise set in the next column of the same row, this is
not printed. Vertically adjacent dots are not subject to any restric-
tions.
The assignment of the individual bits of a graphic byte with the re-
production ratio 5:6 for the four possible resolutions is portrayed in
the following table.
production ratio 5:6 for the four possible resolutions is portrayed in
the following table.