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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore 64 16KB EPROM cartridge emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#include "16kb.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type C64_16KB = &device_creator<c64_16kb_cartridge_device>;
//-------------------------------------------------
// ROM( c64_16kb )
//-------------------------------------------------
ROM_START( c64_16kb )
ROM_REGION( 0x2000, "roml", 0 )
ROM_CART_LOAD( "roml", 0x0000, 0x2000, ROM_MIRROR )
ROM_REGION( 0x2000, "romh", 0 )
ROM_CART_LOAD( "romh", 0x0000, 0x2000, ROM_MIRROR )
ROM_END
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const rom_entry *c64_16kb_cartridge_device::device_rom_region() const
{
return ROM_NAME( c64_16kb );
}
//-------------------------------------------------
// MACHINE_CONFIG_FRAGMENT( c64_16kb )
//-------------------------------------------------
static MACHINE_CONFIG_FRAGMENT( c64_16kb )
MCFG_CARTSLOT_ADD("roml")
MCFG_CARTSLOT_EXTENSION_LIST("rom,bin,80")
MCFG_CARTSLOT_ADD("romh")
MCFG_CARTSLOT_EXTENSION_LIST("rom,bin,a0,e0")
MACHINE_CONFIG_END
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor c64_16kb_cartridge_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( c64_16kb );
}
//-------------------------------------------------
// INPUT_PORTS( c64_16kb )
//-------------------------------------------------
static INPUT_PORTS_START( c64_16kb )
PORT_START("SW1")
PORT_DIPNAME( 0x03, 0x00, "Mode" )
PORT_DIPSETTING( 0x03, "Off" )
PORT_DIPSETTING( 0x02, "8 KB" )
PORT_DIPSETTING( 0x00, "16 KB" )
PORT_DIPSETTING( 0x01, "Ultimax" )
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor c64_16kb_cartridge_device::device_input_ports() const
{
return INPUT_PORTS_NAME( c64_16kb );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// c64_16kb_cartridge_device - constructor
//-------------------------------------------------
c64_16kb_cartridge_device::c64_16kb_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, C64_16KB, "C64 16KB EPROM cartridge", tag, owner, clock, "c64_16kb", __FILE__),
device_c64_expansion_card_interface(mconfig, *this),
m_sw1(*this, "SW1")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void c64_16kb_cartridge_device::device_start()
{
m_roml = memregion("roml")->base();
m_romh = memregion("romh")->base();
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void c64_16kb_cartridge_device::device_reset()
{
UINT8 mode = m_sw1->read();
m_exrom = BIT(mode, 0);
m_game = BIT(mode, 1);
}
//-------------------------------------------------
// c64_cd_r - cartridge data read
//-------------------------------------------------
UINT8 c64_16kb_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)
{
data = m_roml[offset & 0x1fff];
}
else if (!romh)
{
data = m_romh[offset & 0x1fff];
}
return data;
}
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