// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore Plus/4 Expansion Port emulation ********************************************************************** GND 1 A GND +5V 2 B C1 LOW +5V 3 C _BRESET _IRQ 4 D _RAS R/_W 5 E phi0 C1 HIGH 6 F A15 C2 LOW 7 H A14 C2 HIGH 8 J A13 _CS1 9 K A12 _CS0 10 L A11 _CAS 11 M A10 MUX 12 N A9 BA 13 P A8 D7 14 R A7 D6 15 S A6 D5 16 T A5 D4 17 U A4 D3 18 V A3 D2 19 W A2 D1 20 X A1 D0 21 Y A0 AEC 22 Z N.C. (RAMEN) EXT AUDIO 23 AA N.C. phi2 24 BB N.C. GND 25 CC GND **********************************************************************/ #ifndef MAME_BUS_PLUS4_EXP_H #define MAME_BUS_PLUS4_EXP_H #pragma once #include "softlist_dev.h" //************************************************************************** // CONSTANTS //************************************************************************** #define PLUS4_EXPANSION_SLOT_TAG "exp" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> plus4_expansion_slot_device class device_plus4_expansion_card_interface; class plus4_expansion_slot_device : public device_t, public device_single_card_slot_interface, public device_image_interface { public: // construction/destruction template plus4_expansion_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock, T &&opts, char const *dflt) : plus4_expansion_slot_device(mconfig, tag, owner, clock) { option_reset(); opts(*this); set_default_option(dflt); set_fixed(false); } plus4_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); auto irq_wr_callback() { return m_write_irq.bind(); } auto cd_rd_callback() { return m_read_dma_cd.bind(); } auto cd_wr_callback() { return m_write_dma_cd.bind(); } auto aec_wr_callback() { return m_write_aec.bind(); } // computer interface uint8_t cd_r(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h); void cd_w(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h); // cartridge interface uint8_t dma_cd_r(offs_t offset) { return m_read_dma_cd(offset); } void dma_cd_w(offs_t offset, uint8_t data) { m_write_dma_cd(offset, data); } DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); } DECLARE_WRITE_LINE_MEMBER( aec_w ) { m_write_aec(state); } int phi2() { return clock(); } protected: // device-level overrides virtual void device_start() override; // image-level overrides virtual image_init_result call_load() override; virtual const software_list_loader &get_software_list_loader() const override { return rom_software_list_loader::instance(); } virtual iodevice_t image_type() const noexcept override { return IO_CARTSLOT; } virtual bool is_readable() const noexcept override { return true; } virtual bool is_writeable() const noexcept override { return false; } virtual bool is_creatable() const noexcept override { return false; } virtual bool must_be_loaded() const noexcept override { return false; } virtual bool is_reset_on_load() const noexcept override { return true; } virtual const char *image_interface() const noexcept override { return "plus4_cart"; } virtual const char *file_extensions() const noexcept override { return "rom,bin"; } // slot interface overrides virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override; devcb_write_line m_write_irq; devcb_read8 m_read_dma_cd; devcb_write8 m_write_dma_cd; devcb_write_line m_write_aec; device_plus4_expansion_card_interface *m_card; }; // ======================> device_plus4_expansion_card_interface class device_plus4_expansion_card_interface : public device_interface { friend class plus4_expansion_slot_device; public: // construction/destruction virtual ~device_plus4_expansion_card_interface(); // runtime virtual uint8_t plus4_cd_r(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) { return data; } virtual void plus4_cd_w(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) { } protected: device_plus4_expansion_card_interface(const machine_config &mconfig, device_t &device); optional_shared_ptr m_c1l; optional_shared_ptr m_c1h; optional_shared_ptr m_c2l; optional_shared_ptr m_c2h; size_t m_c1l_mask; size_t m_c1h_mask; size_t m_c2l_mask; size_t m_c2h_mask; plus4_expansion_slot_device *m_slot; }; // device type definition DECLARE_DEVICE_TYPE(PLUS4_EXPANSION_SLOT, plus4_expansion_slot_device) void plus4_expansion_cards(device_slot_interface &device); #endif // MAME_BUS_PLUS4_EXP_H