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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
**********************************************************************/
#ifndef MAME_BUS_CBM2_USER_H
#define MAME_BUS_CBM2_USER_H
#pragma once
//**************************************************************************
// 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_interface
{
public:
virtual uint8_t cbm2_d1_r() { return 0xff; }
virtual void cbm2_d1_w(uint8_t data) { }
virtual uint8_t cbm2_d2_r() { return 0xff; }
virtual void cbm2_d2_w(uint8_t 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:
// construction/destruction
device_cbm2_user_port_interface(const machine_config &mconfig, device_t &device);
cbm2_user_port_device *m_slot;
};
// ======================> cbm2_user_port_device
class cbm2_user_port_device : public device_t, public device_single_card_slot_interface<device_cbm2_user_port_interface>
{
public:
// construction/destruction
template <typename T>
cbm2_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, T &&opts, const char *dflt)
: cbm2_user_port_device(mconfig, tag, owner)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
cbm2_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL());
auto irq_callback() { return m_write_irq.bind(); }
auto sp_callback() { return m_write_sp.bind(); }
auto cnt_callback() { return m_write_cnt.bind(); }
auto flag_callback() { return m_write_flag.bind(); }
// computer interface
uint8_t d1_r() { uint8_t data = 0xff; if (m_card != nullptr) data = m_card->cbm2_d1_r(); return data; }
void d1_w(uint8_t data) { if (m_card != nullptr) m_card->cbm2_d1_w(data); }
uint8_t d2_r() { uint8_t data = 0xff; if (m_card != nullptr) data = m_card->cbm2_d2_r(); return data; }
void d2_w(uint8_t data) { if (m_card != nullptr) m_card->cbm2_d2_w(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
DECLARE_DEVICE_TYPE(CBM2_USER_PORT, cbm2_user_port_device)
// slot devices
void cbm2_user_port_cards(device_slot_interface &device);
#endif // MAME_BUS_CBM2_USER_H
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