From 3a770f99137ca2fc88ed58907f0808fca61994a7 Mon Sep 17 00:00:00 2001
From: Vince Weaver <vince@deater.net>
Date: Sat, 4 Nov 2023 00:24:36 -0400
Subject: [PATCH] second: urgh bug in music player, previous fix was broken

didn't handle the corner case of two carries, and the credits music
was crashing after pattern 13

this is an ugly fix but hopefully correct
---
 demos/second/pt3_lib_core.s | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/demos/second/pt3_lib_core.s b/demos/second/pt3_lib_core.s
index 89a5f2d5..9a0c350e 100644
--- a/demos/second/pt3_lib_core.s
+++ b/demos/second/pt3_lib_core.s
@@ -1561,11 +1561,15 @@ not_done:
 	clc
 	sta	PATTERN_L
 	adc	PT3_LOC+PT3_PATTERN_LOC_L
+	php	; save carry as we might generate two
+	clc
 	adc	PATTERN_L
 	sta	PATTERN_L
 
 	lda	PT3_LOC+PT3_PATTERN_LOC_H				; 4
 	adc	#>PT3_LOC		; assume page boundary		; 2
+	plp	; restore carry
+	adc	#0
 	sta	PATTERN_H						; 3
 
 ;	clc