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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore VIC-20 Expansion Port emulation
**********************************************************************/
#include "exp.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type VIC20_EXPANSION_SLOT = &device_creator<vic20_expansion_slot_device>;
//**************************************************************************
// DEVICE VIC20_EXPANSION CARD INTERFACE
//**************************************************************************
//-------------------------------------------------
// device_vic20_expansion_card_interface - constructor
//-------------------------------------------------
device_vic20_expansion_card_interface::device_vic20_expansion_card_interface(const machine_config &mconfig, device_t &device)
: device_slot_card_interface(mconfig, device),
m_blk1(*this, "blk1"),
m_blk2(*this, "blk2"),
m_blk3(*this, "blk3"),
m_blk5(*this, "blk5"),
m_nvram(*this, "nvram")
{
m_slot = dynamic_cast<vic20_expansion_slot_device *>(device.owner());
}
//-------------------------------------------------
// ~device_vic20_expansion_card_interface - destructor
//-------------------------------------------------
device_vic20_expansion_card_interface::~device_vic20_expansion_card_interface()
{
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// vic20_expansion_slot_device - constructor
//-------------------------------------------------
vic20_expansion_slot_device::vic20_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, VIC20_EXPANSION_SLOT, "VIC-20 expansion port", tag, owner, clock, "vic20_expansion_slot", __FILE__),
device_slot_interface(mconfig, *this),
device_image_interface(mconfig, *this),
m_write_irq(*this),
m_write_nmi(*this),
m_write_res(*this), m_card(nullptr)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void vic20_expansion_slot_device::device_start()
{
m_card = dynamic_cast<device_vic20_expansion_card_interface *>(get_card_device());
// resolve callbacks
m_write_irq.resolve_safe();
m_write_nmi.resolve_safe();
m_write_res.resolve_safe();
// inherit bus clock
if (clock() == 0)
{
vic20_expansion_slot_device *root = machine().device<vic20_expansion_slot_device>(VIC20_EXPANSION_SLOT_TAG);
assert(root);
set_unscaled_clock(root->clock());
}
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void vic20_expansion_slot_device::device_reset()
{
if (get_card_device())
{
get_card_device()->reset();
}
}
//-------------------------------------------------
// call_load -
//-------------------------------------------------
bool vic20_expansion_slot_device::call_load()
{
if (m_card)
{
if (software_entry() == nullptr)
{
if (!core_stricmp(filetype(), "20")) fread(m_card->m_blk1, 0x2000);
else if (!core_stricmp(filetype(), "40")) fread(m_card->m_blk2, 0x2000);
else if (!core_stricmp(filetype(), "60")) fread(m_card->m_blk3, 0x2000);
else if (!core_stricmp(filetype(), "70")) fread(m_card->m_blk3, 0x2000, 0x1000);
else if (!core_stricmp(filetype(), "a0")) fread(m_card->m_blk5, 0x2000);
else if (!core_stricmp(filetype(), "b0")) fread(m_card->m_blk5, 0x2000, 0x1000);
else if (!core_stricmp(filetype(), "crt"))
{
// read the header
UINT8 header[2];
fread(&header, 2);
UINT16 address = (header[1] << 8) | header[0];
switch (address)
{
case 0x2000: fread(m_card->m_blk1, 0x2000); break;
case 0x4000: fread(m_card->m_blk2, 0x2000); break;
case 0x6000: fread(m_card->m_blk3, 0x2000); break;
case 0x7000: fread(m_card->m_blk3, 0x2000, 0x1000); break;
case 0xa000: fread(m_card->m_blk5, 0x2000); break;
case 0xb000: fread(m_card->m_blk5, 0x2000, 0x1000); break;
default: return IMAGE_INIT_FAIL;
}
}
}
else
{
load_software_region("blk1", m_card->m_blk1);
load_software_region("blk2", m_card->m_blk2);
load_software_region("blk3", m_card->m_blk3);
load_software_region("blk5", m_card->m_blk5);
}
}
return IMAGE_INIT_PASS;
}
//-------------------------------------------------
// call_softlist_load -
//-------------------------------------------------
bool vic20_expansion_slot_device::call_softlist_load(software_list_device &swlist, const char *swname, const rom_entry *start_entry)
{
machine().rom_load().load_software_part_region(*this, swlist, swname, start_entry);
return true;
}
//-------------------------------------------------
// get_default_card_software -
//-------------------------------------------------
std::string vic20_expansion_slot_device::get_default_card_software()
{
return software_get_default_slot("standard");
}
//-------------------------------------------------
// cd_r - cartridge data read
//-------------------------------------------------
UINT8 vic20_expansion_slot_device::cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3)
{
if (m_card != nullptr)
{
data = m_card->vic20_cd_r(space, offset, data, ram1, ram2, ram3, blk1, blk2, blk3, blk5, io2, io3);
}
return data;
}
//-------------------------------------------------
// cd_w - cartridge data write
//-------------------------------------------------
void vic20_expansion_slot_device::cd_w(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3)
{
if (m_card != nullptr)
{
m_card->vic20_cd_w(space, offset, data, ram1, ram2, ram3, blk1, blk2, blk3, blk5, io2, io3);
}
}
//-------------------------------------------------
// SLOT_INTERFACE( vic20_expansion_cards )
//-------------------------------------------------
// slot devices
#include "fe3.h"
#include "megacart.h"
#include "std.h"
#include "vic1010.h"
#include "vic1110.h"
#include "vic1111.h"
#include "vic1112.h"
#include "vic1210.h"
SLOT_INTERFACE_START( vic20_expansion_cards )
SLOT_INTERFACE("exp", VIC1010)
SLOT_INTERFACE("3k", VIC1210)
SLOT_INTERFACE("8k", VIC1110)
SLOT_INTERFACE("16k", VIC1111)
SLOT_INTERFACE("fe3", VIC20_FE3)
// the following need ROMs from the software list
SLOT_INTERFACE_INTERNAL("standard", VIC20_STD)
SLOT_INTERFACE_INTERNAL("ieee488", VIC1112)
SLOT_INTERFACE_INTERNAL("megacart", VIC20_MEGACART)
SLOT_INTERFACE_END
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