sb: drop shield after timeout

games/sb/TODO

@@ -14,10 +14,8 @@ Strongbadzone:
 + Create sprites for ball (24 of them?)
 + Ball movement logic.  Is actually just 2D
 + Check bounds on person
-+ Sprites for shield positions
-+ Sprites with mask?
++ Do the color mask (different blacks)
 + Animate side walls
-+ Move head
 + Faster hgr copy?
 
 Cliff:

games/sb/asplode.s

@@ -103,6 +103,7 @@ load_background:
 
 	lda	#SHIELD_DOWN
 	sta	SHIELD_POSITION
+	sta	SHIELD_COUNT
 
 	;==========================
 	; main loop
@@ -137,6 +138,21 @@ done_flip:
 
 	inc	FRAME
 
+	;==========================
+	; adjust shield
+	;==========================
+
+	lda	SHIELD_COUNT
+	beq	done_shield_count
+
+	dec	SHIELD_COUNT
+	bne	done_shield_count
+
+	lda	#SHIELD_DOWN		; put shield down if timeout
+	sta	SHIELD_POSITION
+
+done_shield_count:
+
 	;===========================
 	; move head
 	;===========================
@@ -254,6 +270,8 @@ shield_right:
 	lda	#SHIELD_UP_RIGHT
 adjust_shield:
 	sta	SHIELD_POSITION
+	lda	#5
+	sta	SHIELD_COUNT
 	jmp	main_loop
 
 

games/sb/zp.inc

@@ -70,6 +70,7 @@ SHIELD_POSITION = $6E
 	SHIELD_UP_LEFT = 1
 	SHIELD_UP_CENTER = 2
 	SHIELD_UP_RIGHT = 3
+SHIELD_COUNT	= $6F
 
 .if 0
 REGISTER_DUMP	= $70