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// license:BSD-3-Clause
// copyright-holders:smf
/***************************************************************************
Fujitsu Micro F2MC-16 series I/O Port
***************************************************************************/
#include "emu.h"
#include "f2mc16.h"
#include "f2mc16_port.h"
DEFINE_DEVICE_TYPE(F2MC16_PORT, f2mc16_port_device, "f2mc16_port", "F2MC16 Port")
f2mc16_port_device::f2mc16_port_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, F2MC16_PORT, tag, owner, clock),
m_cpu(nullptr),
m_defval(0),
m_mask(0),
m_read_cb(*this, 0xff),
m_write_cb(*this),
m_pdr(0xff),
m_output(0)
{
}
f2mc16_port_device::f2mc16_port_device(const machine_config &mconfig, const char *tag, device_t *owner, uint8_t defval, uint8_t mask) :
f2mc16_port_device(mconfig, tag, owner)
{
m_cpu = downcast<f2mc16_device *>(owner);
m_defval = defval;
m_mask = mask;
}
void f2mc16_port_device::device_start()
{
save_item(NAME(m_pdr));
save_item(NAME(m_ddr));
save_item(NAME(m_ader));
save_item(NAME(m_output));
}
void f2mc16_port_device::device_reset()
{
if (m_defval)
m_pdr = m_defval;
m_ddr = m_defval;
m_ader = m_defval;
update_output(true);
}
uint8_t f2mc16_port_device::pdr_r()
{
uint8_t mask = ~m_ddr & m_mask;
if (mask)
{
if (!m_read_cb.isunset())
return (m_read_cb(0, mask) & mask) | (m_pdr & m_ddr);
else if (!machine().side_effects_disabled())
logerror("%s unmapped read %02x\n", machine().describe_context(), mask);
return m_pdr | mask;
}
return m_pdr;
}
uint8_t f2mc16_port_device::pdr_adc_r()
{
if (m_cpu->rmw())
return m_pdr;
uint8_t mask = ~m_ader & m_pdr & m_mask;
if (mask)
{
if (!m_read_cb.isunset())
return m_read_cb(0, mask) & mask;
else if (!machine().side_effects_disabled())
logerror("%s unmapped read (mask=0x%02x)\n", machine().describe_context(), mask);
}
return 0x00;
}
void f2mc16_port_device::pdr_w(uint8_t data)
{
m_pdr = data & m_mask;
update_output();
}
uint8_t f2mc16_port_device::ddr_r()
{
return m_ddr;
}
void f2mc16_port_device::ddr_w(uint8_t data)
{
m_ddr = data & m_mask;
update_output();
}
uint8_t f2mc16_port_device::ader_r()
{
return m_ader;
}
void f2mc16_port_device::ader_w(uint8_t data)
{
m_ader = data;
}
void f2mc16_port_device::update_output(bool initial)
{
uint8_t output = m_pdr | (~m_ddr & m_mask);
if (m_output != output || initial)
{
m_output = output;
if (!m_write_cb.isunset())
m_write_cb(0, m_output, m_ddr & m_mask);
else if (!initial)
logerror("%s unmapped write %02x (mask=0x%02x)\n", machine().describe_context(), m_pdr & m_ddr, m_ddr);
}
}
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