// 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 //************************************************************************** // 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 = &downcast(*device).set_irq_wr_callback(DEVCB_##_write); #define MCFG_CBM2_USER_PORT_SP_CALLBACK(_write) \ devcb = &downcast(*device).set_sp_wr_callback(DEVCB_##_write); #define MCFG_CBM2_USER_PORT_CNT_CALLBACK(_write) \ devcb = &downcast(*device).set_cnt_wr_callback(DEVCB_##_write); #define MCFG_CBM2_USER_PORT_FLAG_CALLBACK(_write) \ devcb = &downcast(*device).set_flag_wr_callback(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: virtual uint8_t cbm2_d1_r(address_space &space, offs_t offset) { return 0xff; }; virtual void cbm2_d1_w(address_space &space, offs_t offset, uint8_t data) { }; virtual uint8_t cbm2_d2_r(address_space &space, offs_t offset) { return 0xff; }; virtual void cbm2_d2_w(address_space &space, offs_t offset, 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_slot_interface { public: // construction/destruction cbm2_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); template devcb_base &set_irq_wr_callback(Object &&cb) { return m_write_irq.set_callback(std::forward(cb)); } template devcb_base &set_sp_wr_callback(Object &&cb) { return m_write_sp.set_callback(std::forward(cb)); } template devcb_base &set_cnt_wr_callback(Object &&cb) { return m_write_cnt.set_callback(std::forward(cb)); } template devcb_base &set_flag_wr_callback(Object &&cb) { return m_write_flag.set_callback(std::forward(cb)); } // computer interface DECLARE_READ8_MEMBER( d1_r ) { uint8_t 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_t 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 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