// 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 - 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(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)); }