Hard Drivin'/Race Drivin' cockpit in the mame driver only has this.
But all the rest have this?
I notice the highest memory address for these operations is on the steel talons/stun runner board that has this
Maybe the other function that could potentially be missing is lurking around within the 0x8000 to 0xfff0 range?
PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNUSED ) actually is used in Airborne in the debug menu..........
Wonder what 0x9000, 0xa000,0xb000 etc would do?
Code: [Select]
PORT_START("mainpcb:a80000")
PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_START2 ) PORT_NAME("Abort") /* abort */
PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_START1 ) PORT_NAME("Key") /* key */
PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_COIN3 ) /* aux coin */
PORT_BIT( 0xfff8, IP_ACTIVE_LOW, IPT_UNUSED )
But all the rest have this?
Code: [Select]
PORT_BIT( 0x4000, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_TOGGLE PORT_NAME("Center Wheel Edge") /* center edge on steering wheel */
PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNUSED )
I notice the highest memory address for these operations is on the steel talons/stun runner board that has this
Code: [Select]
PORT_BIT( 0xfff0, IP_ACTIVE_LOW, IPT_UNUSED )
Maybe the other function that could potentially be missing is lurking around within the 0x8000 to 0xfff0 range?
PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNUSED ) actually is used in Airborne in the debug menu..........
Wonder what 0x9000, 0xa000,0xb000 etc would do?