IBM 6400 Programmer's Reference

Graph ics Co mm an d Set
Note: The marker cell size is constant 3 mm (0.12 in. [17/144 in.]). The scaling
factor used in defining a graphics area does not affect the size of the marker. If
markers are used near the edge of a defined graphics area, scaling the graphics
may result in the markers being clipped from the printable graphics area.
No Operation
Description: This order is a no-operation; it has no effect on the graphics
medium presentation space or any attribute or any current parameter.
00
Relative Line
Description: This order specifies one or more connected straight lines, like the
Line order, except that the end point of each line is an offset from the previous
end point.
L1 is a one-byte value that specifies the length of the parameter field that
follows. A value of zero for L1 is invalid; L1 must be a multiple of 2. If the value
of L1 is two, the printer does not draw the line. However, the printer does
update the graphics current position to the point specified by P1 and P2.
Parameters P1 to Pn are signed, twos-complement, one-byte values that specify
the offset in drawing units. Parameters P1 and P2 form a two byte value that
specifies the X coordinate of the first end point of the line. Parameters P3 and
P4 form a two byte value that specifies the Y coordinate of the first end point of
the line. Parameter P5 is a signed, twos-complement, one-byte value that
specifies the X coordinate of the second end point as an offset from the first end
point. Parameter P6 is a signed, twos-complement, one-byte value that specifies
the Y coordinate of the second end point as an offset from the first end point.
The remaining parameters, if present, specify additional X and Y coordinate
values as offsets from the previous point, following the same format.
The printer draws the line in the current values of color, mix, line type, and line
width.
This order updates the current graphics position to the coordinates of the last
offset point. If there are no offset points with this order, the current graphics
position does not change.
E1 L1 P1-Pn
Relative Line at Current Position
Description: This order specifies one or more connected straight lines, like the
Line at Current Position order. With this order, the end point of each line is an
offset from the previous end point, rather than an absolute coordinate pair.
L1 is a one-byte value that specifies the length of the parameter field. L1 must
be a multiple of two. The printer will not draw a line if L1 is zero.
Parameters P1 to Pn are signed, twos-complement, one-byte values that specify
the offset, in drawing units. The first line end point is the graphics current
A1 L1 P1-Pn
Chapter 3. IPDS Commands Reference 107

IBM 6400 Specifications

General

Brand	IBM
Model	6400
Category	Printer
Language	English