+ int bd_cycle_delay_ms; // BD game cycle delay (in milliseconds)
+ int bd_cycle_delay_c64; // BD game cycle delay (in C64 game units)
+ int bd_hatching_delay_cycles; // BD hatching delay (in game cycles)
+ int bd_hatching_delay_seconds; // BD hatching delay (in seconds)
+ int bd_scheduling_type; // BD engine scheduling type
+ boolean bd_pal_timing; // BD engine uses special PAL timing
+ boolean bd_line_shifting_borders; // BD engine uses line-shifting wrap-around
+ boolean bd_wraparound_objects; // BD cave object rendering uses wrap-around
+ boolean bd_scan_first_and_last_row; // BD engine scans top and bottom border rows
+ boolean bd_short_explosions; // BD engine uses four game cycles for explosions
+ boolean bd_gravity_affects_all; // BD engine gravity affects all falling objects