Number of Bitplanes
"turned on" Playfield 1* Playfield 2*
0 None None
__________
1 |1 |
|__________|
__________ __________
2 |1 | |2 |
|__________| |__________|
__________ __________
3 |1 ________|_ |2 |
|_|3 | |__________|
|__________|
__________ __________
4 |1 ________|_ |2 ________|_
|_|3 | |_|4 |
|__________| |__________|
__________ __________
5 |1 ________|_ |2 ________|_
|_|3 ________|_ |_|4 |
|_|5 | |__________|
|__________|
__________ __________
6 |1 ________|_ |2 ________|_
|_|3 ________|_ |_|4 ________|_
|_|5 | |_|6 |
|__________| |__________|
*NOTE: Either playfield may be placed "in front of" or
"behind" the other using the "swap-bit"
Figure 3-13: How Bitplanes are assigned to duel playfields.
- 64 Playfield Hardware -