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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***************************************************************************
Konami IC 056230 (LANC)
***************************************************************************/
#include "emu.h"
#include "k056230.h"
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
// device type definition
const device_type K056230 = &device_creator<k056230_device>;
//-------------------------------------------------
// k056230_device - constructor
//-------------------------------------------------
k056230_device::k056230_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, K056230, "K056230 LANC", tag, owner, clock, "k056230", __FILE__),
m_is_thunderh(0),
m_cpu(*this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void k056230_device::device_start()
{
save_item(NAME(m_ram));
}
READ8_MEMBER(k056230_device::read)
{
switch (offset)
{
case 0: // Status register
{
return 0x08;
}
}
// osd_printf_debug("k056230_r: %d at %08X\n", offset, space.device().safe_pc());
return 0;
}
TIMER_CALLBACK( k056230_device::network_irq_clear_callback )
{
reinterpret_cast<k056230_device*>(ptr)->network_irq_clear();
}
void k056230_device::network_irq_clear()
{
if (m_cpu)
m_cpu->set_input_line(INPUT_LINE_IRQ2, CLEAR_LINE);
}
WRITE8_MEMBER(k056230_device::write)
{
switch(offset)
{
case 0: // Mode register
{
break;
}
case 1: // Control register
{
if(data & 0x20)
{
// Thunder Hurricane breaks otherwise...
if (!m_is_thunderh)
{
if (m_cpu)
m_cpu->set_input_line(INPUT_LINE_IRQ2, ASSERT_LINE);
machine().scheduler().timer_set(attotime::from_usec(10), FUNC(network_irq_clear_callback), 0, (void*)this);
}
}
// else
// m_cpu->set_input_line(INPUT_LINE_IRQ2, CLEAR_LINE);
break;
}
case 2: // Sub ID register
{
break;
}
}
// osd_printf_debug("k056230_w: %d, %02X at %08X\n", offset, data, space.device().safe_pc());
}
READ32_MEMBER(k056230_device::lanc_ram_r)
{
//osd_printf_debug("LANC_RAM_r: %08X, %08X at %08X\n", offset, mem_mask, space.device().safe_pc());
return m_ram[offset & 0x7ff];
}
WRITE32_MEMBER(k056230_device::lanc_ram_w)
{
//osd_printf_debug("LANC_RAM_w: %08X, %08X, %08X at %08X\n", data, offset, mem_mask, space.device().safe_pc());
COMBINE_DATA(m_ram + (offset & 0x7ff));
}
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