Commodore Amiga - Chapter 4: SPRITE HARDWARE

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.
BPLCONO - Bit Plane Control
NOTE: Bits in this register cannot be independently set.
Bit 0 - un used
Bit 1 - ERSY (external synchronization enable)
1
= External synchronization enabled
o = 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)
Bit 8 - GAUD (genlock audio enable)
1
= Genlock audio enabled
o = Genlock audio disabled
Bit 9 - COLOR_ON (color enable)
1
= composite video color-burst enabled
0= composite video color-burst disabled
Bit 10 - DBLPF (double-play field enable)
1
= dual play fields enabled
o = single play field enabled
Bit
11 - HOMOD (hold-and-modify enable)
1
= hold-and-modify enabled
o = hold-and-modify disabled
Bits
14,13,12 - BPU2, BPU1, BPUO
Number of bit-planes used.
Playfield Hardware
83