--- xmil/sound/opmgenc.c	2004/08/05 11:46:26	1.3
+++ xmil/sound/opmgenc.c	2005/02/07 16:56:33	1.8
@@ -1,5 +1,10 @@
 #include	"compiler.h"
+
+#if defined(SUPPORT_TURBOZ) || defined(SUPPORT_OPM)
+
+#ifndef		PALMOS
 #include	<math.h>
+#endif
 #include	"sound.h"
 #include	"sndctrl.h"
 
@@ -118,6 +123,11 @@ void opmgen_initialize(UINT rate) {
 	detune2table[3] = D2(3.0);
 }
 
+void opmgen_setvol(UINT vol) {
+
+	opmcfg.fmvol = vol;
+}
+
 
 // ----
 
@@ -175,16 +185,20 @@ static void set_algorithm(OPMCH *ch, REG
 		ch->feedback = 0;
 	}
 
-	switch(value & 0xc0) {
-		case 0x40:
+	switch((value >> 6) & 3) {
+		case 0:
+			outd = &opmgen.feedback4;
+			break;
+
+		case 1:
 			outd = &opmgen.outdl;
 			break;
 
-		case 0x80:
+		case 2:
 			outd = &opmgen.outdr;
 			break;
 
-		default:
+		case 3:
 			outd = &opmgen.outdc;
 			break;
 	}
@@ -463,3 +477,5 @@ void opmgen_setreg(REG8 reg, REG8 value)
 	}
 }
 
+#endif
+