IBM RT Series Hardware Reference Manual page 357

TNL SN20-9844 (March 1987) to 75X0235
Rectangular Copy/Merge Rotate -90 (X'32')
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, VD) LOWER RIGHT CORNER
exclusive
DELTA V
+
1 =
mv)
(XS, VS) LOWER RIGHT CORNER
L . . . - - - r - - - . . . . J
1
exclusive
1...-_ _ _ _ _ _ _ _
DELTA X
+
1 = (OX)
Figure 31. Rotate Window -90 Degrees
Extended Monochrome Graphics Adapter 45