// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Microtanic Real Time Clock **********************************************************************/ #include "emu.h" #include "tanrtc.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(TANBUS_TANRTC, tanbus_tanrtc_device, "tanbus_tanrtc", "Microtanic Real Time Clock") //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void tanbus_tanrtc_device::device_add_mconfig(machine_config &config) { MC146818(config, m_rtc, 32.768_kHz_XTAL); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // tanbus_tanrtc_device - constructor //------------------------------------------------- tanbus_tanrtc_device::tanbus_tanrtc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, TANBUS_TANRTC, tag, owner, clock) , device_tanbus_interface(mconfig, *this) , m_rtc(*this, "rtc") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void tanbus_tanrtc_device::device_start() { } //------------------------------------------------- // read - card read //------------------------------------------------- uint8_t tanbus_tanrtc_device::read(offs_t offset, int inhrom, int inhram, int be) { uint8_t data = 0xff; switch (offset & 0xffc0) { case 0xbc00: data = m_rtc->read_direct(offset); break; } return data; } //------------------------------------------------- // write - card write //------------------------------------------------- void tanbus_tanrtc_device::write(offs_t offset, uint8_t data, int inhrom, int inhram, int be) { switch (offset & 0xffc0) { case 0xbc00: m_rtc->write_direct(offset, data); break; } }