mame/src/mess/machine/vic20exp.h
2012-09-09 12:58:21 +00:00

185 lines
6.3 KiB
C++

/**********************************************************************
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, _clock, _config, _slot_intf, _def_slot, _def_inp) \
MCFG_DEVICE_ADD(_tag, VIC20_EXPANSION_SLOT, _clock) \
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, UINT8 data, 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, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { return data; };
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 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