// 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 { public: // construction/destruction template 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, 0) { 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, uint32_t clock); 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