second: more work on timing

demos/second/irq_wait.s

@@ -1,4 +1,67 @@
-	; wait A * 1 50Hz tick
+	;============================
+	; wait for music pattern
+	; also check for keypress
+	;============================
+	; pattern # in A
+wait_for_pattern:
+	cmp	current_pattern_smc+1
+	beq	done_check_pattern_done
+
+	lda	KEYPRESS
+	bpl	done_check_pattern_notdone
+	bit	KEYRESET
+	jmp	done_check_pattern_done
+
+	;============================
+	; setup timeout of A seconds
+	;============================
+setup_timeout:
+	sta	SECOND_COUNTDOWN
+	lda	#0
+	sta	IRQ_COUNTDOWN
+	rts
+
+	;===========================
+	; countodown second timeout
+	; also check for keypress
+	;===========================
+	; carry set = done
+check_timeout:
+	; check keyboard first
+	lda	KEYPRESS
+	bpl	timeout_not_keypress
+	bit	KEYRESET
+;	lda	#0			; reset, is this necessary?
+;	sta	IRQ_COUNTDOWN
+;	sta	SECOND_COUNTDOWN
+	jmp	done_check_timeout_done
+
+timeout_not_keypress:
+	lda	IRQ_COUNTDOWN
+	bne	done_check_timeout_notdone
+irq_countdown_zero:
+	lda	SECOND_COUNTDOWN
+	beq	done_check_timeout_done
+
+	; otherwise we need to decrement and update
+	dec	SECOND_COUNTDOWN
+	lda	#50
+	sta	IRQ_COUNTDOWN
+
+done_check_pattern_notdone:
+done_check_timeout_notdone:
+	clc
+	rts
+
+done_check_pattern_done:
+done_check_timeout_done:
+	sec
+	rts
+
+
+	;==========================
+	; busy wait A * 1 50Hz tick
+	;==========================
 wait_ticks:
         sta     IRQ_COUNTDOWN
 wait_tick_loop:
@@ -8,6 +71,11 @@ wait_tick_done:
 	rts
 
 
+	;====================
+	; busy wait A seconds
+	;====================
+	; exit early if key pressed
+
 wait_seconds:
 	tax
 

demos/second/part01_intropan/intro.s

@@ -6,6 +6,7 @@
 .include "../zp.inc"
 .include "../hardware.inc"
 .include "../qload.inc"
+.include "../music.inc"
 
 mod7_table      = $1c00
 div7_table      = $1d00

demos/second/part04_chess_shapes/chess.s

@@ -8,6 +8,7 @@
 .include "../zp.inc"
 .include "../hardware.inc"
 .include "../qload.inc"
+.include "../music.inc"
 
 mod7_table	= $1c00
 div7_table	= $1d00
@@ -19,20 +20,36 @@ chess_start:
 	; initializations
 	;=====================
 
-	;===================
+	; some of this not necessary as we come in in HGR
-	; Load graphics
-	;===================
 
 	bit	SET_GR
 	bit	HIRES
 	bit	FULLGR
 	bit	PAGE1
+	bit	KEYRESET
 
-	lda	#$FF
-	jsr	hgr_page1_clearscreen
 	lda	#$00
 	jsr	hgr_page2_clearscreen
 
+	;===================
+	; Load graphics
+	;===================
+
+	; wait until pattern1
+;pattern1_loop:
+;	lda	#1
+;	jsr	wait_for_pattern
+;	bcc	pattern2_loop
+
+	; technically the above, but we're not fast enough
+
+	lda	#175
+	jsr	wait_ticks
+
+;	lda	#$FF
+;	jsr	hgr_page1_clearscreen
+
+
 	;==========================
 	; Falling board animation
 	;==========================
@@ -93,7 +110,7 @@ compact_inner_loop:
 	dey
 	bpl	compact_inner_loop
 
-	lda	#50
+	lda	#30
 	jsr	wait
 
 	inx
@@ -108,6 +125,9 @@ compact_inner_loop:
 	; Bouncing on board animation
 	;=============================
 
+	lda	#10
+	jsr	setup_timeout
+
 	bit	PAGE2
 
 	; load image offscreen $6000
@@ -131,8 +151,8 @@ chess_bounce_loop:
 	ldx     COUNT
 
 	lda     object_coords_x,X
-	cmp	#$FF
+;	cmp	#$FF
-	beq	done_orange_loop
+;	beq	done_orange_loop
 
 	sta     SPRITE_X
 	lda     object_coords_y,X
@@ -156,11 +176,11 @@ chess_bounce_loop:
 
 no_chess_bounce_oflo:
 
-	lda	KEYPRESS
+	jsr	check_timeout
-	bpl	chess_bounce_loop
+	bcc	chess_bounce_loop	; clear if not timed out
+
+done_chess_bounce_loop:
 
-done_chess_bount_loop:
-	bit	KEYRESET
 
 	;=============================
 	; Orange Blob Animation
@@ -187,8 +207,8 @@ orange_loop:
 	ldx     COUNT
 
 	lda     object_coords_x,X
-	cmp	#$FF
+;	cmp	#$FF			; needed?
-	beq	done_orange_loop
+;	beq	done_orange_loop
 
 	sta     SPRITE_X
 	lda     object_coords_y,X
@@ -212,11 +232,16 @@ orange_loop:
 
 no_orange_oflo:
 
-	lda	KEYPRESS
+	; finish at music pattern #10 or keypress
-	bpl	orange_loop
+	lda	#10
+	jsr	wait_for_pattern
+	bcc	orange_loop
 
-done_orange_loop:
+;	lda	KEYPRESS
-	bit	KEYRESET
+;	bpl	orange_loop
+
+;done_orange_loop:
+;	bit	KEYRESET
 
 chess_done:
 
@@ -300,6 +325,7 @@ main_interference_done:
 	.include	"../hgr_clear_screen.s"
 	.include	"../hgr_copy_fast.s"
 	.include	"../hgr_sprite_big.s"
+	.include	"../irq_wait.s"
 
 	.include	"interference.s"
 	.include	"circles.s"