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// 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_interface(device, "vipbyteio")
{
m_slot = dynamic_cast<vip_byteio_port_device *>(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, const XTAL &clock) :
device_t(mconfig, VIP_BYTEIO_PORT, tag, owner, clock),
device_single_card_slot_interface<device_vip_byteio_port_interface>(mconfig, *this),
m_write_inst(*this),
m_cart(nullptr)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void vip_byteio_port_device::device_start()
{
m_cart = 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);
}
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