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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore 64 16KB EPROM cartridge emulation
**********************************************************************/
#include "emu.h"
#include "16kb.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(C64_16KB, c64_16kb_cartridge_device, "c64_16kb", "C64 16KB EPROM cartridge")
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
MACHINE_CONFIG_START(c64_16kb_cartridge_device::device_add_mconfig)
MCFG_GENERIC_CARTSLOT_ADD("roml", generic_linear_slot, nullptr)
MCFG_GENERIC_EXTENSIONS("rom,bin,80")
MCFG_GENERIC_CARTSLOT_ADD("romh", generic_linear_slot, nullptr)
MCFG_GENERIC_EXTENSIONS("rom,bin,a0,e0")
MACHINE_CONFIG_END
//-------------------------------------------------
// 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_t clock) :
device_t(mconfig, C64_16KB, tag, owner, clock),
device_c64_expansion_card_interface(mconfig, *this),
m_sw1(*this, "SW1"),
m_low(*this, "roml"),
m_high(*this, "romh")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void c64_16kb_cartridge_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void c64_16kb_cartridge_device::device_reset()
{
uint8_t mode = m_sw1->read();
m_exrom = BIT(mode, 0);
m_game = BIT(mode, 1);
}
//-------------------------------------------------
// c64_cd_r - cartridge data read
//-------------------------------------------------
uint8_t c64_16kb_cartridge_device::c64_cd_r(address_space &space, offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
if (!roml)
{
data = m_low->read_rom(space, offset & 0x1fff);
}
else if (!romh)
{
data = m_high->read_rom(space, offset & 0x1fff);
}
return data;
}
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