IBM RT Series Hardware Reference Manual page 356

TNL SN20-9844 (March 1987) to 75X0235
Rectangular Copy/Merge Rotate
+
90 (X'31')
This graphic operation type is similar to the rectangular copy/merge graphic operation. The
destination and source rectangular areas should not overlap.
DESTINATION
SOURCE
(XD, YD) LOWER RIGHT CORNER
exclusive
DELTA Y
+
1 = IDY)
(XS, YS) LOWER RIGHT CORNER
I
exclusive
~--t---~
' - - - - - - - - - - DELTA X
+
1
=
(DX)
Figure 30. Rotate Window
+
90 Degrees
44 Extended Monochrome Graphics Adapter