// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** Bally Astrocade Expansion port ***********************************************************************************************************/ #include "emu.h" #include "exp.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(ASTROCADE_EXP_SLOT, astrocade_exp_device, "astrocade_exp", "Bally Astrocade expansion") device_astrocade_exp_interface::device_astrocade_exp_interface(const machine_config &mconfig, device_t &device) : device_interface(device, "astrocadeexp") { } device_astrocade_exp_interface::~device_astrocade_exp_interface() { } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // astrocade_exp_device - constructor //------------------------------------------------- astrocade_exp_device::astrocade_exp_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, ASTROCADE_EXP_SLOT, tag, owner, clock), device_single_card_slot_interface(mconfig, *this), m_card_mounted(false), m_card(nullptr) { } //------------------------------------------------- // astrocade_exp_device - destructor //------------------------------------------------- astrocade_exp_device::~astrocade_exp_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void astrocade_exp_device::device_start() { m_card = get_card_device(); if (m_card) m_card_mounted = true; } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t astrocade_exp_device::read(offs_t offset) { if (m_card) return m_card->read(offset); else return 0xff; } uint8_t astrocade_exp_device::read_io(offs_t offset) { if (m_card) return m_card->read_io(offset); else return 0xff; } /*------------------------------------------------- write -------------------------------------------------*/ void astrocade_exp_device::write(offs_t offset, uint8_t data) { if (m_card) m_card->write(offset, data); } void astrocade_exp_device::write_io(offs_t offset, uint8_t data) { if (m_card) m_card->write_io(offset, data); }