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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Final Cartridge III emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#include "final3.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type C64_FINAL3 = &device_creator<c64_final3_cartridge_device>;
//-------------------------------------------------
// INPUT_CHANGED_MEMBER( freeze )
//-------------------------------------------------
INPUT_CHANGED_MEMBER( c64_final3_cartridge_device::freeze )
{
if (newval)
{
m_game = 0;
m_hidden = 0;
}
m_slot->nmi_w(newval);
}
//-------------------------------------------------
// INPUT_PORTS( c64_final3 )
//-------------------------------------------------
static INPUT_PORTS_START( c64_final3 )
PORT_START("SW")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Reset") PORT_CODE(KEYCODE_F11) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF_OWNER, c64_expansion_slot_device, reset_w)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Freeze") PORT_CODE(KEYCODE_F12) PORT_CHANGED_MEMBER(DEVICE_SELF, c64_final3_cartridge_device, freeze, 0)
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor c64_final3_cartridge_device::device_input_ports() const
{
return INPUT_PORTS_NAME( c64_final3 );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// c64_final3_cartridge_device - constructor
//-------------------------------------------------
c64_final3_cartridge_device::c64_final3_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, C64_FINAL3, "C64 Final Cartridge III", tag, owner, clock, "c64_final3", __FILE__),
device_c64_expansion_card_interface(mconfig, *this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void c64_final3_cartridge_device::device_start()
{
// state saving
save_item(NAME(m_bank));
save_item(NAME(m_hidden));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void c64_final3_cartridge_device::device_reset()
{
m_bank = 0;
m_exrom = 0;
m_game = 0;
m_slot->nmi_w(CLEAR_LINE);
m_hidden = 0;
}
//-------------------------------------------------
// c64_cd_r - cartridge data read
//-------------------------------------------------
UINT8 c64_final3_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
if (!roml || !romh || !io1 || !io2)
{
offs_t addr = (m_bank << 14) | (offset & 0x3fff);
data = m_roml[addr];
}
return data;
}
//-------------------------------------------------
// c64_cd_w - cartridge data write
//-------------------------------------------------
void c64_final3_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
if (!m_hidden && !io2 && ((offset & 0xff) == 0xff))
{
/*
bit description
0 A14
1 A15
2
3
4 EXROM
5 GAME
6 NMI
7 hide register
*/
m_bank = data & 0x03;
m_exrom = BIT(data, 4);
m_game = BIT(data, 5);
m_slot->nmi_w(BIT(data, 6) ? CLEAR_LINE : ASSERT_LINE);
m_hidden = BIT(data, 7);
}
}
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