NEC uPD72257, Preliminary User'S Manual

Page: 236 / 343

8.5.7 Combiner unit
The combiner unit can be operated in minimum mode and in maximum mode. In
minimum mode the smaller value is output and in maximum mode the larger value
is output. The minimum mode represents the intersection and the maximum mode
the union of the two regions.
Input value1
Input value2
Value1<value2
yes
no
output value2 output value1
Figure 8-17 Combiner operated in minmum mode (intersection)
Input value1
Input value2
Value1>value2
yes
no
output value2 output value1
Figure 8-18 Combiner operated in maximum mode (union)
Chapter 8 Drawing Engine
236
Preliminary User's Manual S19203EE1V3UM00