// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** Bally Astrocade Expansion port ***********************************************************************************************************/ #include "emu.h" #include "exp.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type ASTROCADE_EXP_SLOT = &device_creator; device_astrocade_card_interface::device_astrocade_card_interface(const machine_config &mconfig, device_t &device) : device_slot_card_interface(mconfig, device) { } device_astrocade_card_interface::~device_astrocade_card_interface() { } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // astrocade_exp_device - constructor //------------------------------------------------- astrocade_exp_device::astrocade_exp_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, ASTROCADE_EXP_SLOT, "Bally Astrocade expansion", tag, owner, clock, "astrocde_exp", __FILE__), device_slot_interface(mconfig, *this), m_card_mounted(false) { } //------------------------------------------------- // astrocade_exp_device - destructor //------------------------------------------------- astrocade_exp_device::~astrocade_exp_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void astrocade_exp_device::device_start() { m_card = dynamic_cast(get_card_device()); if (m_card) m_card_mounted = true; } /*------------------------------------------------- read -------------------------------------------------*/ READ8_MEMBER(astrocade_exp_device::read) { if (m_card) return m_card->read(space, offset); else return 0xff; } /*------------------------------------------------- write -------------------------------------------------*/ WRITE8_MEMBER(astrocade_exp_device::write) { if (m_card) m_card->write(space, offset, data); }