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// license:BSD-3-Clause
// copyright-holders: F. Ulivi
/*********************************************************************
multibus.cpp
Intel Multibus
*********************************************************************/
/*
* TODO:
* - shared interrupts
* - vectored and non-vectored irq acknowledge
* - inhibit lines
* - lock/unlock
* - bus arbitration/priority
*/
#include "emu.h"
#include "multibus.h"
// device type definition
DEFINE_DEVICE_TYPE(MULTIBUS, multibus_device, "multibus", "Intel Multibus")
DEFINE_DEVICE_TYPE(MULTIBUS_SLOT, multibus_slot_device, "multibus_slot", "Intel Multibus slot")
multibus_device::multibus_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock)
: device_t(mconfig, MULTIBUS, tag, owner, clock)
, device_memory_interface(mconfig, *this)
, m_mem_config("mem", ENDIANNESS_LITTLE, 16, 24, 0, address_map_constructor(FUNC(multibus_device::mem_map), this))
, m_pio_config("pio", ENDIANNESS_LITTLE, 16, 16, 0, address_map_constructor(FUNC(multibus_device::pio_map), this))
, m_int_cb(*this)
, m_xack_cb(*this)
{
}
device_memory_interface::space_config_vector multibus_device::memory_space_config() const
{
return space_config_vector { std::make_pair(AS_PROGRAM, &m_mem_config), std::make_pair(AS_IO, &m_pio_config) };
}
void multibus_device::device_start()
{
}
void multibus_device::mem_map(address_map &map)
{
map(0x00'0000, 0xff'ffff).unmaprw().flags(FLAG_UNMAPPED);
}
void multibus_device::pio_map(address_map &map)
{
map(0x0000, 0xffff).unmaprw().flags(FLAG_UNMAPPED);
}
multibus_slot_device::multibus_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock)
: device_t(mconfig, MULTIBUS_SLOT, tag, owner, clock)
, device_slot_interface(mconfig, *this)
, m_bus(*this, finder_base::DUMMY_TAG)
{
}
void multibus_slot_device::device_start()
{
}
device_multibus_interface::device_multibus_interface(machine_config const &mconfig, device_t &device)
: device_interface(device, "multibus")
, m_bus(*this, finder_base::DUMMY_TAG)
, m_int(*this)
{
}
void device_multibus_interface::interface_config_complete()
{
// FIXME: avoid listxml crash caused by owner device not being a slot
if (device().owner() && device().owner()->owner())
{
m_bus.set_tag(downcast<multibus_slot_device &>(*device().owner()).bus());
multibus_device &bus(*m_bus.lookup());
// route incoming interrupt requests to all cards
bus.int_callback<0>().append([this](int state) { m_int[0](state); });
bus.int_callback<1>().append([this](int state) { m_int[1](state); });
bus.int_callback<2>().append([this](int state) { m_int[2](state); });
bus.int_callback<3>().append([this](int state) { m_int[3](state); });
bus.int_callback<4>().append([this](int state) { m_int[4](state); });
bus.int_callback<5>().append([this](int state) { m_int[5](state); });
bus.int_callback<6>().append([this](int state) { m_int[6](state); });
bus.int_callback<7>().append([this](int state) { m_int[7](state); });
}
}
void device_multibus_interface::int_w(unsigned number, int state)
{
switch (number)
{
case 0: int_w<0>(state); break;
case 1: int_w<1>(state); break;
case 2: int_w<2>(state); break;
case 3: int_w<3>(state); break;
case 4: int_w<4>(state); break;
case 5: int_w<5>(state); break;
case 6: int_w<6>(state); break;
case 7: int_w<7>(state); break;
}
}
void device_multibus_interface::unmap(int spacenum, offs_t addrstart, offs_t addrend, offs_t addrmirror)
{
m_bus->space(spacenum).unmap_readwrite(addrstart, addrend, addrmirror, multibus_device::FLAG_UNMAPPED);
}
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