From 6dcb160c22a6d7d97eb891964aa9720d7944480c Mon Sep 17 00:00:00 2001
From: Vince Weaver <vincent.weaver@maine.edu>
Date: Wed, 26 Sep 2018 16:43:26 -0400
Subject: [PATCH] megademo: add some cycle counts

---
 megademo/gr_hline.s | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/megademo/gr_hline.s b/megademo/gr_hline.s
index a509b419..002d795e 100644
--- a/megademo/gr_hline.s
+++ b/megademo/gr_hline.s
@@ -1,34 +1,44 @@
 	;==================================
 	; HLINE
 	;==================================
-
 	; Color in A
 	; Y has which line
+	; takes 435 cycles
 hline:
 	pha							; 3
 	ldx	gr_offsets,y					; 4+
-	stx	hline_loop+1					; 4
+	stx	hline_loop+1	; self-modify code		; 4
 	lda	gr_offsets+1,y					; 4+
 	clc							; 2
 	adc	DRAW_PAGE					; 3
-	sta	hline_loop+2					; 4
+	sta	hline_loop+2	; self-modify code		; 4
 	pla							; 4
 	ldx	#39						; 2
+							;===========
+							;	 30
 hline_loop:
 	sta	$5d0,X		; 38				; 5
 	dex							; 2
 	bpl	hline_loop					; 2nt/3
+							;===========
+							; 40*(10)=400
+
+								; -1
 	rts							; 6
 
 	;==========================
 	; Clear gr screen
 	;==========================
-	; Color in A
+	; Color in A, Clears 0 to and including Y
+	; clear_gr: takes 2+(48/2)*(6+435+7)+5 = 10759
+	; cpl:      takes (Y/2)*(6+435+7)+5 = ?
 clear_gr:
-	ldy	#46
+	ldy	#46						; 2
 clear_page_loop:
-	jsr	hline
-	dey
-	dey
-	bpl	clear_page_loop
-	rts
+	jsr	hline						; 6+435
+	dey							; 2
+	dey							; 2
+	bpl	clear_page_loop					; 2/3
+	rts							; 6
+
+