diff --git a/corescape.cpp b/corescape.cpp
index 6ae014b..f1d0a0f 100644
--- a/corescape.cpp
+++ b/corescape.cpp
@@ -28,11 +28,16 @@
 #include "status.h"
 #include "intro.h"
 
+#define NOP __asm{nop}
+#define SEI __asm{sei}
+#define CLI __asm{cli}
+
 static char LevelText[] = S"STAGE 1";
 static char GameOverText[] = S"GAMEOVER";
 
 bool	trainer_mode, level_skip, level_retry, restart;
 bool	cheating;
+bool    second_fire, previous_second_fire;
 
 struct Level
 {
@@ -70,6 +75,33 @@ const char PausedColors[] = {
 	VCOL_ORANGE, VCOL_RED, VCOL_PURPLE, VCOL_BLUE
 };
 
+void check_second_fire(void)
+{
+	byte* JoyReg = (byte*)0xDC00;
+	byte* CtrlPort = (byte*)0xD419;
+	byte b;
+
+	previous_second_fire = second_fire;
+
+	SEI
+	JoyReg[2] = 0xC0;
+	NOP
+	b = JoyReg[0];
+	b = b & 0b00111111;
+	b = b | 0b10000000;
+	JoyReg[0] = b;
+	for (byte c = 0; c < 20; c++)
+		NOP
+	
+	b = CtrlPort[0];
+	CLI
+	if (b < 16) second_fire = true;
+	else second_fire = false;
+	JoyReg[0] = 0x7F;
+	JoyReg[2] = 0xFF;
+}
+
+
 void game_pause(void)
 {
 	// Silence during pause
@@ -107,6 +139,12 @@ void game_pause(void)
 		keyb_poll();
 		if (keyb_key == (KSCAN_SPACE | KSCAN_QUAL_DOWN))
 			break;
+
+		// ... or second fire to continue
+		check_second_fire();
+		if (second_fire && !previous_second_fire)
+			break;
+
 	}
 
 	// Hide pause text sprited
@@ -161,8 +199,13 @@ void game_keyboard(void)
 
 		}
 	}
+	//check Second Fire
+	check_second_fire();
+	if (second_fire && !previous_second_fire)
+		game_pause();
 }
 
+
 void game_play(void)
 {
 	// Undo all cheat modes at a new start
diff --git a/gamemusic.c b/gamemusic.c
index 0030e0a..12c8518 100644
--- a/gamemusic.c
+++ b/gamemusic.c
@@ -50,5 +50,5 @@ void music_toggle(void)
 
 void music_volume(char volume)
 {
-	*(volatile char *)0xa15d = volume;
+	*(volatile char*)0xD418 = volume;
 }
diff --git a/intro.cpp b/intro.cpp
index 53851bb..ba972d1 100644
--- a/intro.cpp
+++ b/intro.cpp
@@ -236,7 +236,7 @@ static const char ScrollText[] =
 	S"--- CODING AND GRAPHICS BY \y83DR.MORTAL WOMBAT\y80 "
 	S"--- JOYSTICK IN PORT \y812\y80 "
 	S"--- BUTTON TO START "
-	S"--- SPACE TO PAUSE "
+	S"--- SPACE OR 2ND FIRE TO PAUSE "
 	S"--- CHEATS: \y81S\y82KIP, \y81T\y82RAINER, \y81L\y82IVE, \y81R\y82ETRY, \y81H\y82ALFSPEED \y80"
 	S"--- NO HIGHSCORE WHEN CHEATING :) ---       ";