After looking at vliner input setting, I discovered that there is no button for unibios test switch. Pushing button '7' & '8' will make the game crashed. 
So, I've made some fix to the port setting to make the 'Test Switch' & 'Operator Menu' working.. What has changed :

- Test Switch is now accessible
- button '7' & '8' are now disabled due to conflict in game
- there is only one player for this game actually..
- if you got 'Coin Jam' error, just hit the 'F1' button (Operator Menu) to continue playing 


Button setting : 

button '1' - Payout
button '2' - * not used in game, this is only for test switch *
button '5' - Coins (1)
button '6' - Coins (100) * you can change this in Operator Menu *
button 'F1' - Operator Menu
button 'F2' - Test Switch (UniBios) 

'A button' - Big
'B button' - Small
'C button' - Double Up
'D button' - Start/Collect Points
'E button' - Clear Credit
'F button' - Hoper Out * i wonder what is this for though *


* replace the old inputs with this one

INPUT_PORTS_START( vliner )
	PORT_START_TAG("IN0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("P1 Big")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("P1 Small")
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_NAME("P1 Double Up")
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_NAME("P1 Start/Collect")

	NGIN1 /* there is no player 2 in this game */

	PORT_START_TAG("IN2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 ) PORT_NAME("Payout") /* to enable selection in Test Switch */
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )  /* This bit is used.. */
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START2 )  /* there is no player 2 in this game */
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )  /* This bit is used.. */
	PORT_BIT( 0x30, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* memory card inserted */
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* memory card write protection */
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	NGIN3

	PORT_START_TAG("IN4")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Operator Menu") PORT_CODE(KEYCODE_F1)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_NAME("Clear Credit")
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_NAME("Hopper Out")

	PORT_START_TAG("IN5")
#ifdef USE_NEOGEO_HACKS
	PORT_DIPNAME( 0x03, 0x02,"Territory" )
	PORT_DIPSETTING(	0x00,DEF_STR( Japan ) )
	PORT_DIPSETTING(	0x01,DEF_STR( USA ) )
	PORT_DIPSETTING(	0x02,DEF_STR( Europe ) )
	PORT_DIPNAME( 0x04, 0x04,"Machine Mode" )
	PORT_DIPSETTING(	0x00,"Home" )
	PORT_DIPSETTING(	0x04,"Arcade" )
	PORT_DIPNAME( 0x60, 0x60,"Game Slots" )		// Stored at 0x47 of NVRAM
	PORT_DIPSETTING(	0x60,"2" )
//	PORT_DIPSETTING(	0x40,"2" )
	PORT_DIPSETTING(	0x20,"4" )
	PORT_DIPSETTING(	0x00,"6" )
#endif /* USE_NEOGEO_HACKS */

	NGIN6
INPUT_PORTS_END


neo04
http://aew.handholder.net