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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore CBM-II User Port emulation
**********************************************************************
GND 1 14 2D0
PB2 2 15 1D7
GND 3 16 1D6
PB3 4 17 1D5
PC 5 18 1D4
FLAG 6 19 1D3
2D7 7 20 1D2
2D6 8 21 1D1
2D5 9 22 1D0
2D4 10 23 CNT
2D3 11 24 +5V
2D2 12 25 IRQ
2D1 13 26 SP
**********************************************************************/
#pragma once
#ifndef __CBM2_USER_PORT__
#define __CBM2_USER_PORT__
#include "emu.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
#define CBM2_USER_PORT_TAG "user"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_CBM2_USER_PORT_ADD(_tag, _slot_intf, _def_slot) \
MCFG_DEVICE_ADD(_tag, CBM2_USER_PORT, 0) \
MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
#define MCFG_CBM2_USER_PORT_IRQ_CALLBACK(_write) \
devcb = &cbm2_user_port_device::set_irq_wr_callback(*device, DEVCB_##_write);
#define MCFG_CBM2_USER_PORT_SP_CALLBACK(_write) \
devcb = &cbm2_user_port_device::set_sp_wr_callback(*device, DEVCB_##_write);
#define MCFG_CBM2_USER_PORT_CNT_CALLBACK(_write) \
devcb = &cbm2_user_port_device::set_cnt_wr_callback(*device, DEVCB_##_write);
#define MCFG_CBM2_USER_PORT_FLAG_CALLBACK(_write) \
devcb = &cbm2_user_port_device::set_flag_wr_callback(*device, DEVCB_##_write);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class cbm2_user_port_device;
// ======================> device_cbm2_user_port_interface
// class representing interface-specific live cbm2_expansion card
class device_cbm2_user_port_interface : public device_slot_card_interface
{
public:
// construction/destruction
device_cbm2_user_port_interface(const machine_config &mconfig, device_t &device);
virtual ~device_cbm2_user_port_interface() { }
virtual UINT8 cbm2_d1_r(address_space &space, offs_t offset) { return 0xff; };
virtual void cbm2_d1_w(address_space &space, offs_t offset, UINT8 data) { };
virtual UINT8 cbm2_d2_r(address_space &space, offs_t offset) { return 0xff; };
virtual void cbm2_d2_w(address_space &space, offs_t offset, UINT8 data) { };
virtual int cbm2_pb2_r() { return 1; }
virtual void cbm2_pb2_w(int state) { };
virtual int cbm2_pb3_r() { return 1; }
virtual void cbm2_pb3_w(int state) { };
virtual void cbm2_pc_w(int state) { };
virtual void cbm2_cnt_w(int state) { };
virtual void cbm2_sp_w(int state) { };
protected:
cbm2_user_port_device *m_slot;
};
// ======================> cbm2_user_port_device
class cbm2_user_port_device : public device_t,
public device_slot_interface
{
public:
// construction/destruction
cbm2_user_port_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
virtual ~cbm2_user_port_device() { }
template<class _Object> static devcb_base &set_irq_wr_callback(device_t &device, _Object object) { return downcast<cbm2_user_port_device &>(device).m_write_irq.set_callback(object); }
template<class _Object> static devcb_base &set_sp_wr_callback(device_t &device, _Object object) { return downcast<cbm2_user_port_device &>(device).m_write_sp.set_callback(object); }
template<class _Object> static devcb_base &set_cnt_wr_callback(device_t &device, _Object object) { return downcast<cbm2_user_port_device &>(device).m_write_cnt.set_callback(object); }
template<class _Object> static devcb_base &set_flag_wr_callback(device_t &device, _Object object) { return downcast<cbm2_user_port_device &>(device).m_write_flag.set_callback(object); }
// computer interface
DECLARE_READ8_MEMBER( d1_r ) { UINT8 data = 0xff; if (m_card != nullptr) data = m_card->cbm2_d1_r(space, offset); return data; }
DECLARE_WRITE8_MEMBER( d1_w ) { if (m_card != nullptr) m_card->cbm2_d1_w(space, offset, data); }
DECLARE_READ8_MEMBER( d2_r ) { UINT8 data = 0xff; if (m_card != nullptr) data = m_card->cbm2_d2_r(space, offset); return data; }
DECLARE_WRITE8_MEMBER( d2_w ) { if (m_card != nullptr) m_card->cbm2_d2_w(space, offset, data); }
DECLARE_READ_LINE_MEMBER( pb2_r ) { return m_card ? m_card->cbm2_pb2_r() : 1; }
DECLARE_WRITE_LINE_MEMBER( pb2_w ) { if (m_card != nullptr) m_card->cbm2_pb2_w(state); }
DECLARE_READ_LINE_MEMBER( pb3_r ) { return m_card ? m_card->cbm2_pb3_r() : 1; }
DECLARE_WRITE_LINE_MEMBER( pb3_w ) { if (m_card != nullptr) m_card->cbm2_pb3_w(state); }
DECLARE_WRITE_LINE_MEMBER( pc_w ) { if (m_card != nullptr) m_card->cbm2_pc_w(state); }
DECLARE_WRITE_LINE_MEMBER( cnt_w ) { if (m_card != nullptr) m_card->cbm2_cnt_w(state); }
DECLARE_WRITE_LINE_MEMBER( sp_w ) { if (m_card != nullptr) m_card->cbm2_sp_w(state); }
// cartridge interface
DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); }
DECLARE_WRITE_LINE_MEMBER( cia_sp_w ) { m_write_sp(state); }
DECLARE_WRITE_LINE_MEMBER( cia_cnt_w ) { m_write_cnt(state); }
DECLARE_WRITE_LINE_MEMBER( flag_w ) { m_write_flag(state); }
protected:
// device-level overrides
virtual void device_start() override;
devcb_write_line m_write_irq;
devcb_write_line m_write_sp;
devcb_write_line m_write_cnt;
devcb_write_line m_write_flag;
device_cbm2_user_port_interface *m_card;
};
// device type definition
extern const device_type CBM2_USER_PORT;
// slot devices
SLOT_INTERFACE_EXTERN( cbm2_user_port_cards );
#endif
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