// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** RCA Cosmac VIP Byte Input/Output port emulation **********************************************************************/ #include "emu.h" #include "byteio.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(VIP_BYTEIO_PORT, vip_byteio_port_device, "vip_byteio_port", "VIP byte I/O port") //************************************************************************** // CARD INTERFACE //************************************************************************** //------------------------------------------------- // device_vip_byteio_port_interface - constructor //------------------------------------------------- device_vip_byteio_port_interface::device_vip_byteio_port_interface(const machine_config &mconfig, device_t &device) : device_slot_card_interface(mconfig,device) { m_slot = dynamic_cast(device.owner()); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // vip_byteio_port_device - constructor //------------------------------------------------- vip_byteio_port_device::vip_byteio_port_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, VIP_BYTEIO_PORT, tag, owner, clock), device_slot_interface(mconfig, *this), m_write_inst(*this), m_cart(nullptr) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void vip_byteio_port_device::device_start() { m_cart = dynamic_cast(get_card_device()); // resolve callbacks m_write_inst.resolve_safe(); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void vip_byteio_port_device::device_reset() { } uint8_t vip_byteio_port_device::in_r() { uint8_t data = 0xff; if (m_cart != nullptr) data = m_cart->vip_in_r(); return data; } void vip_byteio_port_device::out_w(uint8_t data) { if (m_cart != nullptr) m_cart->vip_out_w(data); } READ_LINE_MEMBER( vip_byteio_port_device::ef3_r ) { int state = CLEAR_LINE; if (m_cart != nullptr) state = m_cart->vip_ef3_r(); return state; } READ_LINE_MEMBER( vip_byteio_port_device::ef4_r ) { int state = CLEAR_LINE; if (m_cart != nullptr) state = m_cart->vip_ef4_r(); return state; } WRITE_LINE_MEMBER( vip_byteio_port_device::q_w ) { if (m_cart != nullptr) m_cart->vip_q_w(state); } //------------------------------------------------- // SLOT_INTERFACE( vip_byteio_cards ) //------------------------------------------------- void vip_byteio_cards(device_slot_interface &device) { //device.option_add("exp2", VP576_BYTEIO); device.option_add("ascii", VP620); }