diff options
Diffstat (limited to 'src/mess/machine/vic20exp.h')
-rw-r--r-- | src/mess/machine/vic20exp.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/mess/machine/vic20exp.h b/src/mess/machine/vic20exp.h new file mode 100644 index 00000000000..963235e48d6 --- /dev/null +++ b/src/mess/machine/vic20exp.h @@ -0,0 +1,185 @@ +/********************************************************************** + + Commodore VIC-20 Expansion Port emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +********************************************************************** + + GND 1 A GND + CD0 2 B CA0 + CD1 3 C CA1 + CD2 4 D CA2 + CD3 5 E CA3 + CD4 6 F CA4 + CD5 7 H CA5 + CD6 8 J CA6 + CD7 9 K CA7 + _BLK1 10 L CA8 + _BLK2 11 M CA9 + _BLK3 12 N CA10 + _BLK5 13 P CA11 + _RAM1 14 R CA12 + _RAM2 15 S CA13 + _RAM3 16 T _I/O2 + VR/W 17 U _I/O3 + CR/W 18 V Sphi2 + _IRQ 19 W _NMI + N.C. 20 X _RES + +5V 21 Y N.C. + GND 22 Z GND + +**********************************************************************/ + +#pragma once + +#ifndef __VIC20_EXPANSION_SLOT__ +#define __VIC20_EXPANSION_SLOT__ + +#include "emu.h" + + + +//************************************************************************** +// CONSTANTS +//************************************************************************** + +#define VIC20_EXPANSION_SLOT_TAG "exp" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define VIC20_EXPANSION_INTERFACE(_name) \ + const vic20_expansion_slot_interface (_name) = + + +#define MCFG_VIC20_EXPANSION_SLOT_ADD(_tag, _config, _slot_intf, _def_slot, _def_inp) \ + MCFG_DEVICE_ADD(_tag, VIC20_EXPANSION_SLOT, 0) \ + MCFG_DEVICE_CONFIG(_config) \ + MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false) + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> vic20_expansion_slot_interface + +struct vic20_expansion_slot_interface +{ + devcb_write_line m_out_irq_cb; + devcb_write_line m_out_nmi_cb; + devcb_write_line m_out_res_cb; +}; + + +// ======================> vic20_expansion_slot_device + +class device_vic20_expansion_card_interface; + +class vic20_expansion_slot_device : public device_t, + public vic20_expansion_slot_interface, + public device_slot_interface, + public device_image_interface +{ +public: + // construction/destruction + vic20_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + virtual ~vic20_expansion_slot_device(); + + // computer interface + UINT8 cd_r(address_space &space, offs_t offset, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3); + 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); + UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); + DECLARE_WRITE_LINE_MEMBER( port_res_w ); + + // cartridge interface + DECLARE_WRITE_LINE_MEMBER( irq_w ); + DECLARE_WRITE_LINE_MEMBER( nmi_w ); + DECLARE_WRITE_LINE_MEMBER( res_w ); + +protected: + // device-level overrides + virtual void device_config_complete(); + virtual void device_start(); + virtual void device_reset(); + + // image-level overrides + virtual bool call_load(); + virtual bool call_softlist_load(char *swlist, char *swname, rom_entry *start_entry); + + virtual iodevice_t image_type() const { return IO_CARTSLOT; } + + virtual bool is_readable() const { return 1; } + virtual bool is_writeable() const { return 0; } + virtual bool is_creatable() const { return 0; } + virtual bool must_be_loaded() const { return 0; } + virtual bool is_reset_on_load() const { return 1; } + virtual const char *image_interface() const { return "vic1001_cart"; } + virtual const char *file_extensions() const { return "20,40,60,70,a0,b0,crt"; } + virtual const option_guide *create_option_guide() const { return NULL; } + + // slot interface overrides + virtual const char * get_default_card_software(const machine_config &config, emu_options &options); + + devcb_resolved_write_line m_out_irq_func; + devcb_resolved_write_line m_out_nmi_func; + devcb_resolved_write_line m_out_res_func; + + device_vic20_expansion_card_interface *m_cart; +}; + + +// ======================> device_vic20_expansion_card_interface + +// class representing interface-specific live vic20_expansion card +class device_vic20_expansion_card_interface : public device_slot_card_interface +{ + friend class vic20_expansion_slot_device; + +public: + // construction/destruction + device_vic20_expansion_card_interface(const machine_config &mconfig, device_t &device); + virtual ~device_vic20_expansion_card_interface(); + +protected: + // initialization + virtual UINT8* vic20_blk1_pointer(running_machine &machine, size_t size); + virtual UINT8* vic20_blk2_pointer(running_machine &machine, size_t size); + virtual UINT8* vic20_blk3_pointer(running_machine &machine, size_t size); + virtual UINT8* vic20_blk5_pointer(running_machine &machine, size_t size); + virtual UINT8* vic20_ram_pointer(running_machine &machine, size_t size); + virtual UINT8* vic20_nvram_pointer(running_machine &machine, size_t size); + + // runtime + virtual UINT8 vic20_cd_r(address_space &space, offs_t offset, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { return 0; }; + 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) { }; + virtual UINT32 vic20_screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return 0; } + virtual void vic20_res_w(int state) { }; + + vic20_expansion_slot_device *m_slot; + + UINT8 *m_blk1; + UINT8 *m_blk2; + UINT8 *m_blk3; + UINT8 *m_blk5; + UINT8 *m_ram; + UINT8 *m_nvram; + + size_t m_nvram_size; + + size_t m_nvram_mask; +}; + + +// device type definition +extern const device_type VIC20_EXPANSION_SLOT; + + + +#endif |