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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Currah MicroSlot
**********************************************************************/
#include "emu.h"
#include "uslot.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(SPECTRUM_USLOT, spectrum_uslot_device, "spectrum_uslot", "Spectrum Currah \xC2\xB5Slot")
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void spectrum_uslot_device::device_add_mconfig(machine_config &config)
{
/* passthru */
SPECTRUM_EXPANSION_SLOT(config, m_exp1, spectrum_expansion_devices, nullptr);
m_exp1->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w));
m_exp1->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w));
SPECTRUM_EXPANSION_SLOT(config, m_exp2, spectrum_expansion_devices, nullptr);
m_exp2->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w));
m_exp2->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w));
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// spectrum_uslot_device - constructor
//-------------------------------------------------
spectrum_uslot_device::spectrum_uslot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, SPECTRUM_USLOT, tag, owner, clock)
, device_spectrum_expansion_interface(mconfig, *this)
, m_exp1(*this, "exp1")
, m_exp2(*this, "exp2")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void spectrum_uslot_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void spectrum_uslot_device::device_reset()
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
READ_LINE_MEMBER(spectrum_uslot_device::romcs)
{
return m_exp1->romcs() | m_exp2->romcs();
}
uint8_t spectrum_uslot_device::mreq_r(offs_t offset)
{
uint8_t temp;
uint8_t data = 0xff;
temp = m_exp1->mreq_r(offset);
if (m_exp1->romcs())
data &= temp;
temp = m_exp2->mreq_r(offset);
if (m_exp2->romcs())
data &= temp;
return data;
}
void spectrum_uslot_device::mreq_w(offs_t offset, uint8_t data)
{
if (m_exp1->romcs())
m_exp1->mreq_w(offset, data);
if (m_exp2->romcs())
m_exp2->mreq_w(offset, data);
}
uint8_t spectrum_uslot_device::port_fe_r(offs_t offset)
{
uint8_t data = 0xff;
if (m_exp1->romcs())
data &= m_exp1->port_fe_r(offset);
if (m_exp2->romcs())
data &= m_exp2->port_fe_r(offset);
return data;
}
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