/
exp.cpp
153 lines (116 loc) · 3.72 KB
/
exp.cpp
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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
BBC Master Compact Expansion slot emulation
**********************************************************************/
#include "emu.h"
#include "exp.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(BBC_EXP_SLOT, bbc_exp_slot_device, "bbc_exp_slot", "BBC Master Compact Expansion port")
//**************************************************************************
// DEVICE BBC_EXP PORT INTERFACE
//**************************************************************************
//-------------------------------------------------
// device_bbc_exp_interface - constructor
//-------------------------------------------------
device_bbc_exp_interface::device_bbc_exp_interface(const machine_config &mconfig, device_t &device) :
device_interface(device, "bbcexp")
{
m_slot = dynamic_cast<bbc_exp_slot_device *>(device.owner());
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// bbc_exp_slot_device - constructor
//-------------------------------------------------
bbc_exp_slot_device::bbc_exp_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, BBC_EXP_SLOT, tag, owner, clock),
device_single_card_slot_interface<device_bbc_exp_interface>(mconfig, *this),
m_card(nullptr),
m_irq_handler(*this),
m_nmi_handler(*this),
m_cb1_handler(*this),
m_cb2_handler(*this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void bbc_exp_slot_device::device_start()
{
m_card = get_card_device();
}
//-------------------------------------------------
// read
//-------------------------------------------------
uint8_t bbc_exp_slot_device::fred_r(offs_t offset)
{
if (m_card)
return m_card->fred_r(offset);
else
return 0xff;
}
uint8_t bbc_exp_slot_device::jim_r(offs_t offset)
{
if (m_card)
return m_card->jim_r(offset);
else
return 0xff;
}
uint8_t bbc_exp_slot_device::sheila_r(offs_t offset)
{
if (m_card)
return m_card->sheila_r(offset);
else
return 0xfe;
}
//-------------------------------------------------
// write
//-------------------------------------------------
void bbc_exp_slot_device::fred_w(offs_t offset, uint8_t data)
{
if (m_card)
m_card->fred_w(offset, data);
}
void bbc_exp_slot_device::jim_w(offs_t offset, uint8_t data)
{
if (m_card)
m_card->jim_w(offset, data);
}
void bbc_exp_slot_device::sheila_w(offs_t offset, uint8_t data)
{
if (m_card)
m_card->sheila_w(offset, data);
}
//-------------------------------------------------
// pb_r
//-------------------------------------------------
uint8_t bbc_exp_slot_device::pb_r()
{
if (m_card)
return 0x1f | m_card->pb_r();
else
return 0xff;
}
//-------------------------------------------------
// pb_w
//-------------------------------------------------
void bbc_exp_slot_device::pb_w(uint8_t data)
{
if (m_card)
m_card->pb_w(data);
}
//-------------------------------------------------
// SLOT_INTERFACE( bbc_exp_devices )
//-------------------------------------------------
// slot devices
#include "autocue.h"
#include "mertec.h"
void bbc_exp_devices(device_slot_interface &device)
{
device.option_add_internal("autocue", BBC_AUTOCUE); /* Autocue RAM disk board */
device.option_add("mertec", BBC_MERTEC); /* Mertec Compact Companion */
}