From 9ba123953e6e839189da47ea97af2a8f3c01ac34 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Wed, 24 Apr 2024 13:01:02 -0500
Subject: [PATCH] C64: fix duty overflow

just in case
---
 src/engine/platform/c64.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/engine/platform/c64.cpp b/src/engine/platform/c64.cpp
index fd3a0e03a..fc341a9e5 100644
--- a/src/engine/platform/c64.cpp
+++ b/src/engine/platform/c64.cpp
@@ -182,6 +182,7 @@ void DivPlatformC64::tick(bool sysTick) {
           chan[i].duty-=chan[i].std.duty.val;
         }
       }
+      chan[i].duty&=4095;
       rWrite(i*7+2,chan[i].duty&0xff);
       rWrite(i*7+3,chan[i].duty>>8);
     }