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// license:BSD-3-Clause
// copyright-holders:Sergey Svishchev
/***************************************************************************
BK parallel slot with byte addressing mod
Combines 16 input, 16 output bits (no readback) from register 177714
and bitbanger tx/rx bits from register 177716 into a 64-pin connector.
Bitbanger has software support only in bk0010 ROM (EMT 40..50), and
is not implemented.
***************************************************************************/
#include "emu.h"
#include "parallel.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(BK_PARALLEL_SLOT, bk_parallel_slot_device, "bk_parallel_slot", "BK Parallel Slot")
//**************************************************************************
// SLOT DEVICE
//**************************************************************************
//-------------------------------------------------
// bk_parallel_slot_device - constructor
//-------------------------------------------------
bk_parallel_slot_device::bk_parallel_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, BK_PARALLEL_SLOT, tag, owner, clock)
, device_single_card_slot_interface<device_bk_parallel_interface>(mconfig, *this)
, m_cart(nullptr)
, m_irq2_handler(*this)
, m_irq3_handler(*this)
{
}
//-------------------------------------------------
// bk_parallel_slot_device - destructor
//-------------------------------------------------
bk_parallel_slot_device::~bk_parallel_slot_device()
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void bk_parallel_slot_device::device_start()
{
m_cart = get_card_device();
}
//**************************************************************************
// I/O PORTS
//**************************************************************************
/*
* Internal bus on the BK is derived from Q-Bus (active low signalling.)
*
* Invert data for convenience; bus drivers for the slot are not inverting.
*/
uint16_t bk_parallel_slot_device::read()
{
if (m_cart)
return m_cart->io_r() ^ 0xffff;
else
return 0;
}
void bk_parallel_slot_device::write(offs_t offset, uint16_t data, uint16_t mem_mask)
{
if (m_cart)
m_cart->io_w(data ^ 0xffff, mem_mask == 0xffff);
}
void bk_parallel_slot_device::init_w()
{
if (m_cart)
m_cart->init_w();
}
//**************************************************************************
// CARTRIDGE INTERFACE
//**************************************************************************
//-------------------------------------------------
// device_bk_parallel_interface - constructor
//-------------------------------------------------
device_bk_parallel_interface::device_bk_parallel_interface(const machine_config &mconfig, device_t &device)
: device_interface(device, "bkpar")
{
m_slot = dynamic_cast<bk_parallel_slot_device *>(device.owner());
}
//-------------------------------------------------
// ~device_bk_parallel_interface - destructor
//-------------------------------------------------
device_bk_parallel_interface::~device_bk_parallel_interface()
{
}
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