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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore VIC-20 Expansion Port emulation
**********************************************************************
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 MCFG_VIC20_EXPANSION_SLOT_ADD(_tag, _clock, _slot_intf, _def_slot) \
MCFG_DEVICE_ADD(_tag, VIC20_EXPANSION_SLOT, _clock) \
MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
#define MCFG_VIC20_PASSTHRU_EXPANSION_SLOT_ADD(_tag) \
MCFG_VIC20_EXPANSION_SLOT_ADD(_tag, 0, vic20_expansion_cards, NULL) \
MCFG_VIC20_EXPANSION_SLOT_IRQ_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, irq_w)) \
MCFG_VIC20_EXPANSION_SLOT_NMI_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, nmi_w)) \
MCFG_VIC20_EXPANSION_SLOT_RES_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, res_w))
#define MCFG_VIC20_EXPANSION_SLOT_IRQ_CALLBACK(_write) \
devcb = &vic20_expansion_slot_device::set_irq_wr_callback(*device, DEVCB_##_write);
#define MCFG_VIC20_EXPANSION_SLOT_NMI_CALLBACK(_write) \
devcb = &vic20_expansion_slot_device::set_nmi_wr_callback(*device, DEVCB_##_write);
#define MCFG_VIC20_EXPANSION_SLOT_RES_CALLBACK(_write) \
devcb = &vic20_expansion_slot_device::set_res_wr_callback(*device, DEVCB_##_write);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> vic20_expansion_slot_device
class device_vic20_expansion_card_interface;
class vic20_expansion_slot_device : public device_t,
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);
template<class _Object> static devcb_base &set_irq_wr_callback(device_t &device, _Object object) { return downcast<vic20_expansion_slot_device &>(device).m_write_irq.set_callback(object); }
template<class _Object> static devcb_base &set_nmi_wr_callback(device_t &device, _Object object) { return downcast<vic20_expansion_slot_device &>(device).m_write_nmi.set_callback(object); }
template<class _Object> static devcb_base &set_res_wr_callback(device_t &device, _Object object) { return downcast<vic20_expansion_slot_device &>(device).m_write_res.set_callback(object); }
// 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);
// cartridge interface
DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); }
DECLARE_WRITE_LINE_MEMBER( nmi_w ) { m_write_nmi(state); }
DECLARE_WRITE_LINE_MEMBER( res_w ) { m_write_res(state); }
protected:
// device-level overrides
virtual void device_config_complete() { update_names(); }
virtual void device_start();
virtual void device_reset();
// image-level overrides
virtual bool call_load();
virtual bool call_softlist_load(software_list_device &swlist, const char *swname, const 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 nullptr; }
// slot interface overrides
virtual void get_default_card_software(std::string &result);
devcb_write_line m_write_irq;
devcb_write_line m_write_nmi;
devcb_write_line m_write_res;
device_vic20_expansion_card_interface *m_card;
};
// ======================> 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();
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) { };
protected:
optional_shared_ptr<UINT8> m_blk1;
optional_shared_ptr<UINT8> m_blk2;
optional_shared_ptr<UINT8> m_blk3;
optional_shared_ptr<UINT8> m_blk5;
optional_shared_ptr<UINT8> m_nvram;
vic20_expansion_slot_device *m_slot;
};
// device type definition
extern const device_type VIC20_EXPANSION_SLOT;
SLOT_INTERFACE_EXTERN( vic20_expansion_cards );
#endif
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