mirror of
https://github.com/holub/mame
synced 2025-05-30 01:23:07 +03:00
185 lines
6.3 KiB
C++
185 lines
6.3 KiB
C++
/**********************************************************************
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Commodore VIC-20 Expansion Port emulation
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Copyright MESS Team.
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Visit http://mamedev.org for licensing and usage restrictions.
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**********************************************************************
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GND 1 A GND
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CD0 2 B CA0
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CD1 3 C CA1
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CD2 4 D CA2
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CD3 5 E CA3
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CD4 6 F CA4
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CD5 7 H CA5
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CD6 8 J CA6
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CD7 9 K CA7
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_BLK1 10 L CA8
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_BLK2 11 M CA9
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_BLK3 12 N CA10
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_BLK5 13 P CA11
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_RAM1 14 R CA12
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_RAM2 15 S CA13
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_RAM3 16 T _I/O2
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VR/W 17 U _I/O3
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CR/W 18 V Sphi2
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_IRQ 19 W _NMI
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N.C. 20 X _RES
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+5V 21 Y N.C.
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GND 22 Z GND
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**********************************************************************/
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#pragma once
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#ifndef __VIC20_EXPANSION_SLOT__
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#define __VIC20_EXPANSION_SLOT__
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#include "emu.h"
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//**************************************************************************
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// CONSTANTS
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//**************************************************************************
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#define VIC20_EXPANSION_SLOT_TAG "exp"
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//**************************************************************************
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// INTERFACE CONFIGURATION MACROS
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//**************************************************************************
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#define VIC20_EXPANSION_INTERFACE(_name) \
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const vic20_expansion_slot_interface (_name) =
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#define MCFG_VIC20_EXPANSION_SLOT_ADD(_tag, _clock, _config, _slot_intf, _def_slot, _def_inp) \
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MCFG_DEVICE_ADD(_tag, VIC20_EXPANSION_SLOT, _clock) \
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MCFG_DEVICE_CONFIG(_config) \
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MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false)
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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// ======================> vic20_expansion_slot_interface
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struct vic20_expansion_slot_interface
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{
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devcb_write_line m_out_irq_cb;
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devcb_write_line m_out_nmi_cb;
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devcb_write_line m_out_res_cb;
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};
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// ======================> vic20_expansion_slot_device
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class device_vic20_expansion_card_interface;
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class vic20_expansion_slot_device : public device_t,
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public vic20_expansion_slot_interface,
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public device_slot_interface,
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public device_image_interface
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{
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public:
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// construction/destruction
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vic20_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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virtual ~vic20_expansion_slot_device();
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// computer interface
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UINT8 cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3);
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void cd_w(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3);
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UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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DECLARE_WRITE_LINE_MEMBER( port_res_w );
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// cartridge interface
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DECLARE_WRITE_LINE_MEMBER( irq_w );
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DECLARE_WRITE_LINE_MEMBER( nmi_w );
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DECLARE_WRITE_LINE_MEMBER( res_w );
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protected:
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// device-level overrides
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virtual void device_config_complete();
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virtual void device_start();
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virtual void device_reset();
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// image-level overrides
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virtual bool call_load();
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virtual bool call_softlist_load(char *swlist, char *swname, rom_entry *start_entry);
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virtual iodevice_t image_type() const { return IO_CARTSLOT; }
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virtual bool is_readable() const { return 1; }
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virtual bool is_writeable() const { return 0; }
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virtual bool is_creatable() const { return 0; }
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virtual bool must_be_loaded() const { return 0; }
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virtual bool is_reset_on_load() const { return 1; }
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virtual const char *image_interface() const { return "vic1001_cart"; }
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virtual const char *file_extensions() const { return "20,40,60,70,a0,b0,crt"; }
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virtual const option_guide *create_option_guide() const { return NULL; }
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// slot interface overrides
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virtual const char * get_default_card_software(const machine_config &config, emu_options &options);
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devcb_resolved_write_line m_out_irq_func;
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devcb_resolved_write_line m_out_nmi_func;
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devcb_resolved_write_line m_out_res_func;
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device_vic20_expansion_card_interface *m_cart;
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};
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// ======================> device_vic20_expansion_card_interface
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// class representing interface-specific live vic20_expansion card
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class device_vic20_expansion_card_interface : public device_slot_card_interface
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{
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friend class vic20_expansion_slot_device;
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public:
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// construction/destruction
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device_vic20_expansion_card_interface(const machine_config &mconfig, device_t &device);
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virtual ~device_vic20_expansion_card_interface();
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protected:
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// initialization
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virtual UINT8* vic20_blk1_pointer(running_machine &machine, size_t size);
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virtual UINT8* vic20_blk2_pointer(running_machine &machine, size_t size);
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virtual UINT8* vic20_blk3_pointer(running_machine &machine, size_t size);
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virtual UINT8* vic20_blk5_pointer(running_machine &machine, size_t size);
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virtual UINT8* vic20_ram_pointer(running_machine &machine, size_t size);
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virtual UINT8* vic20_nvram_pointer(running_machine &machine, size_t size);
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// runtime
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virtual UINT8 vic20_cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { return data; };
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virtual void vic20_cd_w(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { };
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virtual void vic20_res_w(int state) { };
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vic20_expansion_slot_device *m_slot;
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UINT8 *m_blk1;
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UINT8 *m_blk2;
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UINT8 *m_blk3;
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UINT8 *m_blk5;
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UINT8 *m_ram;
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UINT8 *m_nvram;
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size_t m_nvram_size;
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size_t m_nvram_mask;
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};
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// device type definition
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extern const device_type VIC20_EXPANSION_SLOT;
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#endif
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