// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
#include "emu.h"
#include "lpc-rtc.h"
const device_type LPC_RTC = device_creator<lpc_rtc_device>;
DEVICE_ADDRESS_MAP_START(map, 32, lpc_rtc_device)
AM_RANGE(0x70, 0x77) AM_READWRITE8(index_r, index_w, 0x00ff00ff)
AM_RANGE(0x70, 0x77) AM_READWRITE8(target_r, target_w, 0xff00ff00)
ADDRESS_MAP_END
DEVICE_ADDRESS_MAP_START(extmap, 32, lpc_rtc_device)
AM_RANGE(0x70, 0x77) AM_READWRITE8(extindex_r, extindex_w, 0x00ff0000)
AM_RANGE(0x70, 0x77) AM_READWRITE8(exttarget_r, exttarget_w, 0xff000000)
ADDRESS_MAP_END
lpc_rtc_device::lpc_rtc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: lpc_device(mconfig, LPC_RTC, "LPC RTC", tag, owner, clock, "lpc_rtc", __FILE__), cur_index(0), cur_extindex(0)
{
}
void lpc_rtc_device::map_device(uint64_t memory_window_start, uint64_t memory_window_end, uint64_t memory_offset, address_space *memory_space,
uint64_t io_window_start, uint64_t io_window_end, uint64_t io_offset, address_space *io_space)
{
io_space->install_device(io_offset, io_window_end, *this, &lpc_rtc_device::map);
}
void lpc_rtc_device::map_extdevice(uint64_t memory_window_start, uint64_t memory_window_end, uint64_t memory_offset, address_space *memory_space,
uint64_t io_window_start, uint64_t io_window_end, uint64_t io_offset, address_space *io_space)
{
io_space->install_device(io_offset, io_window_end, *this, &lpc_rtc_device::extmap);
}
void lpc_rtc_device::device_start()
{
memset(ram, 0, 256);
}
void lpc_rtc_device::device_reset()
{
}
READ8_MEMBER( lpc_rtc_device::index_r)
{
return cur_index;
}
WRITE8_MEMBER( lpc_rtc_device::index_w)
{
cur_index = data & 0x7f;
}
READ8_MEMBER( lpc_rtc_device::target_r)
{
return ram[cur_index];
}
WRITE8_MEMBER( lpc_rtc_device::target_w)
{
ram[cur_index] = data;
logerror("%s: ram[%02x] = %02x\n", tag(), cur_index, data);
}
READ8_MEMBER( lpc_rtc_device::extindex_r)
{
return cur_extindex;
}
WRITE8_MEMBER( lpc_rtc_device::extindex_w)
{
cur_extindex = data & 0x7f;
}
READ8_MEMBER( lpc_rtc_device::exttarget_r)
{
return ram[cur_extindex|128];
}
WRITE8_MEMBER( lpc_rtc_device::exttarget_w)
{
ram[cur_extindex|128] = data;
logerror("%s: ram[%02x] = %02x\n", tag(), cur_extindex|128, data);
}