From 9035510f06bd48ceac6e911e84e265d424c97f4b Mon Sep 17 00:00:00 2001
From: ripsaw8080 <ripsaw8080@users.sourceforge.net>
Date: Sun, 14 Feb 2016 03:59:17 +0000
Subject: [PATCH] Take into account that speaker might be disabled in settings.
 Fixes bug #434.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3967
---
 src/hardware/pcspeaker.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hardware/pcspeaker.cpp b/src/hardware/pcspeaker.cpp
index d426a66c..3e166fc6 100644
--- a/src/hardware/pcspeaker.cpp
+++ b/src/hardware/pcspeaker.cpp
@@ -192,7 +192,7 @@ void PCSPEAKER_SetCounter(Bitu cntr,Bitu mode) {
 		spkr.pit_max=(1000.0f/PIT_TICK_RATE)*cntr;
 		break;
 	case 3:		/* Square wave generator */
-		if (cntr<spkr.min_tr) {
+		if (cntr==0 || cntr<spkr.min_tr) {
 			/* skip frequencies that can't be represented */
 			spkr.pit_last=0;
 			spkr.pit_mode=0;