// license:BSD-3-Clause // copyright-holders:Olivier Galibert #include "emu.h" #include "wpc_shift.h" DEFINE_DEVICE_TYPE(WPC_SHIFT, wpc_shift_device, "wpc_shift", "Williams Pinball Controller Shifter") wpc_shift_device::wpc_shift_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, WPC_SHIFT, tag, owner, clock) { } wpc_shift_device::~wpc_shift_device() { } void wpc_shift_device::registers(address_map &map) { map(0, 0).rw(FUNC(wpc_shift_device::adrh_r), FUNC(wpc_shift_device::adrh_w)); map(1, 1).rw(FUNC(wpc_shift_device::adrl_r), FUNC(wpc_shift_device::adrl_w)); map(2, 2).rw(FUNC(wpc_shift_device::val1_r), FUNC(wpc_shift_device::val1_w)); map(3, 3).rw(FUNC(wpc_shift_device::val2_r), FUNC(wpc_shift_device::val2_w)); } uint8_t wpc_shift_device::adrh_r() { return (adr + (val1 >> 3)) >> 8; } void wpc_shift_device::adrh_w(uint8_t data) { adr = (adr & 0xff) | (data << 8); } uint8_t wpc_shift_device::adrl_r() { return adr + (val1 >> 3); } void wpc_shift_device::adrl_w(uint8_t data) { adr = (adr & 0xff00) | data; } uint8_t wpc_shift_device::val1_r() { return 1 << (val1 & 7); } void wpc_shift_device::val1_w(uint8_t data) { val1 = data; } uint8_t wpc_shift_device::val2_r() { return 1 << (val2 & 7); } void wpc_shift_device::val2_w(uint8_t data) { val2 = data; } void wpc_shift_device::device_start() { save_item(NAME(adr)); save_item(NAME(val1)); save_item(NAME(val2)); } void wpc_shift_device::device_reset() { adr = 0x0000; val1 = 0x00; val2 = 0x00; }