// license:BSD-3-Clause // copyright-holders:Angelo Salese /*************************************************************************** SH7604 Watchdog Timer Controller TODO: - Host CPU setter (clock and callback for irq and reset lines); - memory map (needs to verify if ID write is ok); ***************************************************************************/ #include "emu.h" #include "sh7604_wdt.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** // device type definition DEFINE_DEVICE_TYPE(SH7604_WDT, sh7604_wdt_device, "sh7604wdt", "SH7604 Watchdog Timer") //************************************************************************** // LIVE DEVICE //************************************************************************** void sh7604_wdt_device::wdt_regs(address_map &map) { // map(0x00, 0x00) timer control/status // map(0x01, 0x01) timer counter // map(0x02, 0x02) write only, reset control register // map(0x03, 0x03) read status register, write reset status register } //------------------------------------------------- // sh7604_wdt_device - constructor //------------------------------------------------- sh7604_wdt_device::sh7604_wdt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, SH7604_WDT, tag, owner, clock) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void sh7604_wdt_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void sh7604_wdt_device::device_reset() { } //************************************************************************** // READ/WRITE HANDLERS //************************************************************************** READ8_MEMBER( sh7604_wdt_device::read ) { return space.read_byte(offset); } WRITE16_MEMBER( sh7604_wdt_device::write ) { uint8_t id_param = data >> 8; switch(id_param) { case 0xa5: space.write_byte(offset*2+0,data & 0xff); break; case 0x5a: space.write_byte(offset*2+1,data & 0xff); break; default: throw emu_fatalerror("%s: invalid id param write = %02x\n",tag(),id_param); } }