diff --git a/src/mame/drivers/ajax.c b/src/mame/drivers/ajax.c
index 00f89e2a64d..f9a8bcb9e6c 100644
--- a/src/mame/drivers/ajax.c
+++ b/src/mame/drivers/ajax.c
@@ -167,9 +167,8 @@ WRITE8_MEMBER(ajax_state::volume_callback1)
 static MACHINE_CONFIG_START( ajax, ajax_state )
 
 	/* basic machine hardware */
-	MCFG_CPU_ADD("maincpu", KONAMI, 3000000)    /* 12/4 MHz*/
+	MCFG_CPU_ADD("maincpu", KONAMI, XTAL_24MHz/2/4)    /* 052001 12/4 MHz*/
 	MCFG_CPU_PROGRAM_MAP(ajax_main_map)
-	MCFG_CPU_VBLANK_INT_DRIVER("screen", ajax_state,  ajax_interrupt)   /* IRQs triggered by the 051960 */
 
 	MCFG_CPU_ADD("sub", M6809, 3000000) /* ? */
 	MCFG_CPU_PROGRAM_MAP(ajax_sub_map)
@@ -181,10 +180,9 @@ static MACHINE_CONFIG_START( ajax, ajax_state )
 
 	/* video hardware */
 	MCFG_SCREEN_ADD("screen", RASTER)
-	MCFG_SCREEN_REFRESH_RATE(60)
-	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
-	MCFG_SCREEN_SIZE(64*8, 32*8)
-	MCFG_SCREEN_VISIBLE_AREA(14*8, (64-14)*8-1, 2*8, 30*8-1 )
+	MCFG_SCREEN_RAW_PARAMS(XTAL_24MHz/3, 528, 112, 400, 256, 16, 240)
+//  6MHz dotclock is more realistic, however needs drawing updates. replace when ready
+//	MCFG_SCREEN_RAW_PARAMS(XTAL_24MHz/4, 396, hbend, hbstart, 256, 16, 240)
 	MCFG_SCREEN_UPDATE_DRIVER(ajax_state, screen_update_ajax)
 	MCFG_SCREEN_PALETTE("palette")
 
@@ -198,7 +196,9 @@ static MACHINE_CONFIG_START( ajax, ajax_state )
 
 	MCFG_DEVICE_ADD("k051960", K051960, 0)
 	MCFG_GFX_PALETTE("palette")
+	MCFG_K051960_SCREEN_TAG("screen")
 	MCFG_K051960_CB(ajax_state, sprite_callback)
+	MCFG_K051960_IRQ_HANDLER(INPUTLINE("maincpu", KONAMI_IRQ_LINE))
 
 	MCFG_DEVICE_ADD("k051316", K051316, 0)
 	MCFG_GFX_PALETTE("palette")
diff --git a/src/mame/includes/ajax.h b/src/mame/includes/ajax.h
index 42cdb55ae98..e8197eea633 100644
--- a/src/mame/includes/ajax.h
+++ b/src/mame/includes/ajax.h
@@ -47,7 +47,6 @@ public:
 	virtual void machine_start();
 	virtual void machine_reset();
 	UINT32 screen_update_ajax(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
-	INTERRUPT_GEN_MEMBER(ajax_interrupt);
 	DECLARE_WRITE8_MEMBER(volume_callback0);
 	DECLARE_WRITE8_MEMBER(volume_callback1);
 	K051316_CB_MEMBER(zoom_callback);
diff --git a/src/mame/machine/ajax.c b/src/mame/machine/ajax.c
index f684fd5ca28..15d4ca3415b 100644
--- a/src/mame/machine/ajax.c
+++ b/src/mame/machine/ajax.c
@@ -214,9 +214,3 @@ void ajax_state::machine_reset()
 	m_priority = 0;
 	m_firq_enable = 0;
 }
-
-INTERRUPT_GEN_MEMBER(ajax_state::ajax_interrupt)
-{
-	if (m_k051960->k051960_is_irq_enabled())
-		device.execute().set_input_line(KONAMI_IRQ_LINE, HOLD_LINE);
-}