From e3c885a0cefc753438519bacbec0e4c74617bf55 Mon Sep 17 00:00:00 2001
From: alyosha-tas <alexei.f.k@gmail.com>
Date: Mon, 8 Jan 2018 20:25:57 -0500
Subject: [PATCH] C64: Flsuh audio when readin from voice 3 output ports Fixes
 strongman

---
 .../Computers/Commodore64/MOS/Sid.Registers.cs        | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Sid.Registers.cs b/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Sid.Registers.cs
index 860df3e7b6..71f65cf74e 100644
--- a/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Sid.Registers.cs
+++ b/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Sid.Registers.cs
@@ -111,8 +111,15 @@
 					break;
 				case 0x19: result = _potX; break;
 				case 0x1A: result = _potY; break;
-				case 0x1B: result = _voiceOutput2 >> 4; break;
-				case 0x1C: result = _envelopeOutput2; break;
+				// these two registers are reading the sound output in real time, so we need to flush the output here
+				case 0x1B:
+					Flush(false);
+					result = _voiceOutput2 >> 4;
+					break;
+				case 0x1C:
+					Flush(false);
+					result = _envelopeOutput2;
+					break;
 			}
 
 			return result;