// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore 64 Expansion Port emulation ********************************************************************** GND 1 A GND +5V 2 B _ROMH +5V 3 C _RESET _IRQ 4 D _NMI _CR/W 5 E Sphi2 DOTCLK 6 F CA15 _I/O1 7 H CA14 _GAME 8 J CA13 _EXROM 9 K CA12 _I/O2 10 L CA11 _ROML 11 M CA10 BA 12 N CA9 _DMA 13 P CA8 CD7 14 R CA7 CD6 15 S CA6 CD5 16 T CA5 CD4 17 U CA4 CD3 18 V CA3 CD2 19 W CA2 CD1 20 X CA1 CD0 21 Y CA0 GND 22 Z GND **********************************************************************/ #ifndef MAME_BUS_C64_EXP_H #define MAME_BUS_C64_EXP_H #pragma once #include "softlist_dev.h" #include "formats/cbm_crt.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> c64_expansion_slot_device class device_c64_expansion_card_interface; class c64_expansion_slot_device : public device_t, public device_slot_interface, public device_image_interface { public: // construction/destruction template c64_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&opts, const char *dflt) : c64_expansion_slot_device(mconfig, tag, owner, clock) { option_reset(); opts(*this); set_default_option(dflt); set_fixed(false); } c64_expansion_slot_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_nmi_wr_callback(Object &&cb) { return m_write_nmi.set_callback(std::forward(cb)); } template devcb_base &set_reset_wr_callback(Object &&cb) { return m_write_reset.set_callback(std::forward(cb)); } template devcb_base &set_cd_rd_callback(Object &&cb) { return m_read_dma_cd.set_callback(std::forward(cb)); } template devcb_base &set_cd_wr_callback(Object &&cb) { return m_write_dma_cd.set_callback(std::forward(cb)); } template devcb_base &set_dma_wr_callback(Object &&cb) { return m_write_dma.set_callback(std::forward(cb)); } auto irq_callback() { return m_write_irq.bind(); } auto nmi_callback() { return m_write_nmi.bind(); } auto reset_callback() { return m_write_reset.bind(); } auto cd_input_callback() { return m_read_dma_cd.bind(); } auto cd_output_callback() { return m_write_dma_cd.bind(); } auto dma_callback() { return m_write_dma.bind(); } // computer interface uint8_t cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2); void cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2); int game_r(offs_t offset, int sphi2, int ba, int rw, int hiram); int exrom_r(offs_t offset, int sphi2, int ba, int rw, int hiram); // 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( nmi_w ) { m_write_nmi(state); } DECLARE_WRITE_LINE_MEMBER( dma_w ) { m_write_dma(state); } DECLARE_WRITE_LINE_MEMBER( reset_w ) { m_write_reset(state); } int phi2() { return clock(); } int dotclock() { return phi2() * 8; } int hiram() { return m_hiram; } void set_passthrough(); protected: // device-level overrides virtual void device_validity_check(validity_checker &valid) const override; virtual void device_start() override; virtual void device_reset() 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 override { return IO_CARTSLOT; } virtual bool is_readable() const override { return 1; } virtual bool is_writeable() const override { return 0; } virtual bool is_creatable() const override { return 0; } virtual bool must_be_loaded() const override { return 0; } virtual bool is_reset_on_load() const override { return 1; } virtual const char *image_interface() const override { return "c64_cart,vic10_cart"; } virtual const char *file_extensions() const override { return "80,a0,e0,crt"; } // slot interface overrides virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override; devcb_read8 m_read_dma_cd; devcb_write8 m_write_dma_cd; devcb_write_line m_write_irq; devcb_write_line m_write_nmi; devcb_write_line m_write_dma; devcb_write_line m_write_reset; device_c64_expansion_card_interface *m_card; int m_hiram; }; // ======================> device_c64_expansion_card_interface class device_c64_expansion_card_interface : public device_slot_card_interface { friend class c64_expansion_slot_device; public: // construction/destruction virtual ~device_c64_expansion_card_interface(); virtual uint8_t c64_cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { return data; }; virtual void c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { }; virtual int c64_game_r(offs_t offset, int sphi2, int ba, int rw) { return m_game; } virtual int c64_exrom_r(offs_t offset, int sphi2, int ba, int rw) { return m_exrom; } protected: device_c64_expansion_card_interface(const machine_config &mconfig, device_t &device); optional_shared_ptr m_roml; optional_shared_ptr m_romh; optional_shared_ptr m_nvram; int m_game; int m_exrom; c64_expansion_slot_device *m_slot; }; // device type definition DECLARE_DEVICE_TYPE(C64_EXPANSION_SLOT, c64_expansion_slot_device) void c64_expansion_cards(device_slot_interface &device); #endif