--- np2/bios/bios.c	2003/10/21 11:22:05	1.3
+++ np2/bios/bios.c	2003/11/14 10:04:56	1.4
@@ -6,6 +6,8 @@
 #include	"iocore.h"
 #include	"bios.h"
 #include	"biosmem.h"
+#include	"sound.h"
+#include	"fmboard.h"
 #include	"lio.h"
 #include	"fddfile.h"
 #include	"fdd_mtr.h"
@@ -94,6 +96,11 @@ static void bios_reinitbyswitch(void) {
 		gdc.display |= 4;
 	}
 	gdcs.textdisp |= GDCSCRN_EXT;
+
+	if ((np2cfg.model >= PCMODEL_VX) && (usesound & 0x7e)) {
+		iocore_out8(0x188, 0x27);
+		iocore_out8(0x18a, 0x3f);
+	}
 }
 
 static void bios_vectorset(void) {									// ver0.30