From 4a34f4036544c9cb137237dbf5f23d8a5d2eafa1 Mon Sep 17 00:00:00 2001
From: Paul Gilbert
Date: Mon, 6 Feb 2012 21:17:12 +1100
Subject: MORTEVIELLE: Replace timer chip frequency values with a constant

---
 engines/mortevielle/sound.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/engines/mortevielle/sound.cpp b/engines/mortevielle/sound.cpp
index 08dbe0ba02..0a6e7e8d8d 100644
--- a/engines/mortevielle/sound.cpp
+++ b/engines/mortevielle/sound.cpp
@@ -129,6 +129,9 @@ int8 PCSpeaker::generateSquare(uint32 x, uint32 oscLength) {
 
 const int tab[16] = { -96, -72, -48, -32, -20, -12, -8, -4, 0, 4, 8, 12, 20, 32, 48, 72 };
 
+// The PC timer chip works at a frequency of 1.19318Mhz
+#define TIMER_FREQUENCY 1193180
+
 SoundManager::SoundManager(Audio::Mixer *mixer) {
 	_mixer = mixer;
 	_speakerStream = new PCSpeaker(mixer->getOutputRate());
@@ -177,13 +180,13 @@ void SoundManager::musyc(tablint &tb, int nbseg, int att) {
 	const byte *pSrc = &mem[0x5000 * 16];
 	
 	// Convert the countdown amount to a tempo rate, and then to note length in microseconds
-	int tempo = 1193180 / att;
+	int tempo = TIMER_FREQUENCY / att;
 	int length = 1000000 / tempo;
 
 	for (int noteIndex = 0; noteIndex < (nbseg * 16); ++noteIndex) {
 		int lookupValue = *pSrc++;
 		int noteCountdown = tb[lookupValue];
-		int noteFrequency = 1193180 / noteCountdown;
+		int noteFrequency = TIMER_FREQUENCY / noteCountdown;
 
 		playNote(noteFrequency, length);
 	}
-- 
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