Robotron: 2084: Routine at E863

Used by the routine at Stage_Next_Wave.

Entry point called from Stage_Next_Wave. Reads the tracked enemy active count at C42C; if non-zero, jumps immediately to the spawn step at Evaluate_And_Spawn_Tracked_Enemies_Go. Otherwise checks C42D; if zero, also jumps to Evaluate_And_Spawn_Tracked_Enemies_Go. If C42D is non-zero, halves it twice: if the result is still non-zero, jumps to Evaluate_And_Spawn_Tracked_Enemies_Go; otherwise increments A to 01 and falls through to store the spawn count and call Spawn_Tracked_Enemy_Entities.

Used by the routine at Stage_Next_Wave. Entry point called from Stage_Next_Wave. Reads the tracked enemy active count at C42C; if non-zero, jumps immediately to the spawn step at Evaluate_And_Spawn_Tracked_Enemies_Go. Otherwise checks C42D; if zero, also jumps to Evaluate_And_Spawn_Tracked_Enemies_Go. If C42D is non-zero, halves it twice: if the result is still non-zero, jumps to Evaluate_And_Spawn_Tracked_Enemies_Go; otherwise increments A to 01 and falls through to store the spawn count and call Spawn_Tracked_Enemy_Entities.
Evaluate_And_Spawn_Tracked_Enemies	E863	LD A,($C42C)	If the tracked enemy active count at C42C is non-zero, skip to Evaluate_And_Spawn_Tracked_Enemies_Go.
	E866	AND A
	E867	JP NZ,Evaluate_And_Spawn_Tracked_Enemies_Go
	E86A	LD A,($C42D)
	E86D	AND A	If the set count at C42D is also zero, skip to Evaluate_And_Spawn_Tracked_Enemies_Go.
	E86E	JP Z,Evaluate_And_Spawn_Tracked_Enemies_Go
	E871	SRL A	Halve C42D twice; if the result is still non-zero, skip to Evaluate_And_Spawn_Tracked_Enemies_Go.
	E873	SRL A
	E875	JP NZ,Evaluate_And_Spawn_Tracked_Enemies_Go
	E878	INC A	Set spawn count to 1.
Evaluate_And_Spawn_Tracked_Enemies_Go	E879	LD ($C42C),A	Store the spawn count at C42C.
	E87C	CALL Spawn_Tracked_Enemy_Entities	Call Spawn_Tracked_Enemy_Entities to spawn the tracked enemy wave and advance.
	E87F	INC HL
	E880	RET