// license:BSD-3-Clause // copyright-holders:Olivier Galibert #include "emu.h" #include "wpc_shift.h" const device_type WPC_SHIFT = &device_creator; wpc_shift_device::wpc_shift_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, WPC_SHIFT, "Williams Pinball Controller Shifter", tag, owner, clock, "wpc_shift", __FILE__) { } wpc_shift_device::~wpc_shift_device() { } DEVICE_ADDRESS_MAP_START( registers, 8, wpc_shift_device ) AM_RANGE(0, 0) AM_READWRITE(adrh_r, adrh_w) AM_RANGE(1, 1) AM_READWRITE(adrl_r, adrl_w) AM_RANGE(2, 2) AM_READWRITE(val1_r, val1_w) AM_RANGE(3, 3) AM_READWRITE(val2_r, val2_w) ADDRESS_MAP_END READ8_MEMBER(wpc_shift_device::adrh_r) { return (adr + (val1 >> 3)) >> 8; } WRITE8_MEMBER(wpc_shift_device::adrh_w) { adr = (adr & 0xff) | (data << 8); } READ8_MEMBER(wpc_shift_device::adrl_r) { return adr + (val1 >> 3); } WRITE8_MEMBER(wpc_shift_device::adrl_w) { adr = (adr & 0xff00) | data; } READ8_MEMBER(wpc_shift_device::val1_r) { return 1 << (val1 & 7); } WRITE8_MEMBER(wpc_shift_device::val1_w) { val1 = data; } READ8_MEMBER(wpc_shift_device::val2_r) { return 1 << (val2 & 7); } WRITE8_MEMBER(wpc_shift_device::val2_w) { 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; }