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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore 1700/1750/1764 RAM Expansion Unit emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#include "reu.h"
//**************************************************************************
// MACROS / CONSTANTS
//**************************************************************************
#define MOS8726R1_TAG "u1"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type C64_REU1700 = &device_creator<c64_reu1700_cartridge_device>;
const device_type C64_REU1750 = &device_creator<c64_reu1750_cartridge_device>;
const device_type C64_REU1764 = &device_creator<c64_reu1764_cartridge_device>;
//-------------------------------------------------
// ROM( c64_reu )
//-------------------------------------------------
ROM_START( c64_reu )
ROM_REGION( 0x8000, "roml", 0 )
ROM_CART_LOAD( "rom", 0x0000, 0x8000, ROM_MIRROR )
ROM_END
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const rom_entry *c64_reu_cartridge_device::device_rom_region() const
{
return ROM_NAME( c64_reu );
}
//-------------------------------------------------
// MACHINE_CONFIG_FRAGMENT( c64_reu )
//-------------------------------------------------
static MACHINE_CONFIG_FRAGMENT( c64_reu )
MCFG_MOS8726_ADD(MOS8726R1_TAG)
MCFG_CARTSLOT_ADD("rom")
MCFG_CARTSLOT_EXTENSION_LIST("rom,bin")
MACHINE_CONFIG_END
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor c64_reu_cartridge_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( c64_reu );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// c64_reu_cartridge_device - constructor
//-------------------------------------------------
c64_reu_cartridge_device::c64_reu_cartridge_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant, int jp1, size_t ram_size, const char *shortname, const char *source) :
device_t(mconfig, type, name, tag, owner, clock, shortname, source),
device_c64_expansion_card_interface(mconfig, *this),
m_dmac(*this, MOS8726R1_TAG),
m_rom(*this, "rom"),
m_ram(*this, "ram"),
m_variant(variant),
m_jp1(jp1),
m_ram_size(ram_size)
{
}
c64_reu1700_cartridge_device::c64_reu1700_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: c64_reu_cartridge_device(mconfig, C64_REU1700, "1700 REU", tag, owner, clock, TYPE_1700, 0, 128 * 1024, "c64_1700reu", __FILE__) { }
c64_reu1750_cartridge_device::c64_reu1750_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: c64_reu_cartridge_device(mconfig, C64_REU1750, "1750 REU", tag, owner, clock, TYPE_1750, 1, 256 * 1024, "c64_1750reu", __FILE__) { }
c64_reu1764_cartridge_device::c64_reu1764_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: c64_reu_cartridge_device(mconfig, C64_REU1764, "1764 REU", tag, owner, clock, TYPE_1764, 1, 512 * 1024, "c64_1764reu", __FILE__) { }
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void c64_reu_cartridge_device::device_start()
{
// allocate memory
m_ram.allocate(m_ram_size);
// setup DMA controller
m_dmac->set_unscaled_clock(m_slot->phi2());
m_dmac->bs_w(m_jp1);
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void c64_reu_cartridge_device::device_reset()
{
m_dmac->reset();
}
//-------------------------------------------------
// c64_cd_r - cartridge data read
//-------------------------------------------------
UINT8 c64_reu_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 (!m_dmac->romsel_r(roml, romh))
{
data = m_roml[offset & 0x7fff];
}
else if (!io2)
{
data = m_dmac->read(space, offset);
}
return data;
}
//-------------------------------------------------
// c64_cd_w - cartridge data write
//-------------------------------------------------
void c64_reu_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 (!io2)
{
m_dmac->write(space, offset, data);
}
}
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