Commodore Amiga A2000 - Forming a Display with Several Different Playfeld; Using an External Video Source; Summary of Playfield Registers

FORMING A DISPLAY WITH SEVERAL DIFFERENT PLAYFIELDS
The graphics library provides the ability to split the screen into several "ViewPorts", each
with its own colors and resolutions. See the Amiga ROM Kernel Manual for more
information.
USING AN EXTERNAL VIDEO SOURCE
An optional board that provides genlock is available for the Amiga. Genlock allows you to
bring in your graphics display from an external video source (such as a VCR, camera, or
laser disk player). When you use genlock, the background color is replaced by the display
from this external video source. For more information, see the instructions furnished with
the optional board.
SUMMARY OF PLAYFIELD REGISTERS
This section summarizes the registers used in this chapter and the meaning of their bit
settings. The color registers are summarized in the next section. See Appendix A for a
summary of all registers.
BPLCON0 - Bit Plane Control
NOTE
Bits in this register cannot be independently set.
Bit 0 - unused
Bit 1 - ERSY (external synchronization enable)
1 = External synchronization enabled (allows genlock synchronization
to occur)
0 = External synchronization disabled
Bit 2 - LACE (interlace enable)
1 = interlaced mode enabled
0 = non-interlaced mode enabled
Bit 3 - LPEN (light pen enable)
Bits 4-7 not used (make 0)
- 84 Playfield Hardware -