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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
S-100 (IEEE-696/1983) bus emulation
**********************************************************************/
#include "emu.h"
#include "s100.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(S100_BUS, s100_bus_device, "s100_bus", "S100 bus")
DEFINE_DEVICE_TYPE(S100_SLOT, s100_slot_device, "s100_slot", "S100 slot")
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// device_s100_card_interface - constructor
//-------------------------------------------------
device_s100_card_interface::device_s100_card_interface(const machine_config &mconfig, device_t &device) :
device_interface(device, "s100bus"),
m_bus(nullptr)
{
}
void device_s100_card_interface::interface_pre_start()
{
if (!m_bus)
throw device_missing_dependencies();
}
//-------------------------------------------------
// s100_slot_device - constructor
//-------------------------------------------------
s100_slot_device::s100_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, S100_SLOT, tag, owner, clock),
device_single_card_slot_interface<device_s100_card_interface>(mconfig, *this),
m_bus(*this, DEVICE_SELF_OWNER)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void s100_slot_device::device_start()
{
device_s100_card_interface *const dev = get_card_device();
if (dev)
m_bus->add_card(*dev);
}
//-------------------------------------------------
// s100_bus_device - constructor
//-------------------------------------------------
s100_bus_device::s100_bus_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, S100_BUS, tag, owner, clock),
m_write_irq(*this),
m_write_nmi(*this),
m_write_vi0(*this),
m_write_vi1(*this),
m_write_vi2(*this),
m_write_vi3(*this),
m_write_vi4(*this),
m_write_vi5(*this),
m_write_vi6(*this),
m_write_vi7(*this),
m_write_dma0(*this),
m_write_dma1(*this),
m_write_dma2(*this),
m_write_dma3(*this),
m_write_rdy(*this),
m_write_hold(*this),
m_write_error(*this)
{
}
s100_bus_device::~s100_bus_device()
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void s100_bus_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void s100_bus_device::device_reset()
{
}
//-------------------------------------------------
// add_card - add card
//-------------------------------------------------
void s100_bus_device::add_card(device_s100_card_interface &card)
{
card.m_bus = this;
m_device_list.emplace_back(card);
}
//-------------------------------------------------
// smemr_r - memory read
//-------------------------------------------------
uint8_t s100_bus_device::smemr_r(offs_t offset)
{
uint8_t data = 0xff;
for (device_s100_card_interface &entry : m_device_list)
data &= entry.s100_smemr_r(offset);
return data;
}
//-------------------------------------------------
// mwrt_w - memory write
//-------------------------------------------------
void s100_bus_device::mwrt_w(offs_t offset, uint8_t data)
{
for (device_s100_card_interface &entry : m_device_list)
entry.s100_mwrt_w(offset, data);
}
//-------------------------------------------------
// sinp_r - I/O read
//-------------------------------------------------
uint8_t s100_bus_device::sinp_r(offs_t offset)
{
uint8_t data = 0xff;
for (device_s100_card_interface &entry : m_device_list)
data &= entry.s100_sinp_r(offset);
return data;
}
//-------------------------------------------------
// sout_w - I/O write
//-------------------------------------------------
void s100_bus_device::sout_w(offs_t offset, uint8_t data)
{
for (device_s100_card_interface &entry : m_device_list)
entry.s100_sout_w(offset, data);
}
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