diff --git a/src/mame/drivers/suprnova.c b/src/mame/drivers/suprnova.c
index 06ae5f5e375..ee74e2f2087 100644
--- a/src/mame/drivers/suprnova.c
+++ b/src/mame/drivers/suprnova.c
@@ -33,8 +33,6 @@ video:   Sprite Zooming - the current algorithm is leaving gaps, most noticeable
 
 video:   Sprite positions still kludged slightly (see skns_sprite_kludge)
 
-general: bios is still being skipped, gets stuck at last bios screen if we run it (see #define BIOS_SKIP)
-
 ------------------
 
 SUPER-KANEKO-NOVA-SYSTEM
@@ -154,10 +152,6 @@ NEP-16
 #include "video/sknsspr.h"
 #include "includes/suprnova.h"
 
-
-#define BIOS_SKIP 1 // Skip Bios as it takes too long and doesn't complete atm.
-
-
 static void hit_calc_orig(UINT16 p, UINT16 s, UINT16 org, UINT16 *l, UINT16 *r)
 {
 	switch(org & 3) {
@@ -299,10 +293,37 @@ static WRITE32_HANDLER ( skns_hit_w )
 
 static WRITE32_HANDLER ( skns_hit2_w )
 {
+	UINT32 *bios = (UINT32 *)space->machine().region("maincpu")->base();
+	char biosid = (char)(bios[0x424>>2] >> 24);
 	skns_state *state = space->machine().driver_data<skns_state>();
 	hit_t &hit = state->m_hit;
-//  log_event("HIT", "Set disconnect to %02x", data);
-	hit.disconnect = data;
+	
+	// Decide to unlock on country char of string "FOR xxxxx" in Bios ROM at offset 0x420
+	// this code simulates behaviour of protection PLD
+	data>>= 24;
+	hit.disconnect = 1;
+	switch (biosid)
+	{		
+		case 'J':
+			if (data == 0) hit.disconnect= 0;
+		break;
+		case 'U':		
+			if (data == 1) hit.disconnect= 0;
+		break;				
+		case 'K':
+			if (data == 2) hit.disconnect= 0;
+		break;
+		case 'E':
+			if (data == 3) hit.disconnect= 0;
+		break;		
+		case 'A':			
+			if (data < 2) hit.disconnect= 0;
+		break;
+		// unknow country id, unlock per default
+		default:
+			hit.disconnect= 0;
+		break;
+	}	
 }
 
 
@@ -406,7 +427,19 @@ static TIMER_DEVICE_CALLBACK( interrupt_callback )
 }
 
 static MACHINE_RESET(skns)
-{
+{	
+	UINT32 *bios = (UINT32 *)machine.region("maincpu")->base();
+	char biosid = (char)(bios[0x424>>2] >> 24);
+	skns_state *state = machine.driver_data<skns_state>();
+	hit_t &hit = state->m_hit;
+	
+	if (biosid != 'A') 
+	{
+		hit.disconnect= 1; 
+	} else
+	{
+		hit.disconnect= 0;
+	}
 	memory_set_bankptr(machine, "bank1",machine.region("user1")->base());
 }
 
@@ -828,17 +861,6 @@ static MACHINE_CONFIG_START( skns, skns_state )
 	MCFG_SOUND_ROUTE(1, "rspeaker", 1.0)
 MACHINE_CONFIG_END
 
-/***** BIOS SKIPPING *****/
-
-static READ32_HANDLER( bios_skip_r )
-{
-	skns_state *state = space->machine().driver_data<skns_state>();
-#if BIOS_SKIP
-	if ((cpu_get_pc(&space->device())==0x6f8) || (cpu_get_pc(&space->device())==0x6fa)) space->write_byte(0x06000029,1);
-#endif
-	return state->m_main_ram[0x00028/4];
-}
-
 /***** IDLE SKIPPING *****/
 
 static READ32_HANDLER( gutsn_speedup_r )
@@ -969,9 +991,6 @@ static void init_skns(running_machine &machine)
 {
 	// init DRC to fastest options
 	sh2drc_set_options(machine.device("maincpu"), SH2DRC_FASTEST_OPTIONS);
-
-	sh2drc_add_pcflush(machine.device("maincpu"), 0x6f8);
-	machine.device("maincpu")->memory().space(AS_PROGRAM)->install_legacy_read_handler(0x6000028, 0x600002b, FUNC(bios_skip_r) );
 }
 
 static void set_drc_pcflush(running_machine &machine, UINT32 addr)