// 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
**********************************************************************/
#ifndef MAME_BUS_VIC20_EXP_H
#define MAME_BUS_VIC20_EXP_H
#pragma once
#include "softlist_dev.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
#define VIC20_EXPANSION_SLOT_TAG "exp"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_VIC20_PASSTHRU_EXPANSION_SLOT_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, VIC20_EXPANSION_SLOT, DERIVED_CLOCK(1, 1), vic20_expansion_cards, nullptr) \
MCFG_VIC20_EXPANSION_SLOT_IRQ_CALLBACK(WRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, irq_w)) \
MCFG_VIC20_EXPANSION_SLOT_NMI_CALLBACK(WRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, nmi_w)) \
MCFG_VIC20_EXPANSION_SLOT_RES_CALLBACK(WRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, res_w))
#define MCFG_VIC20_EXPANSION_SLOT_IRQ_CALLBACK(_write) \
devcb = &downcast<vic20_expansion_slot_device &>(*device).set_irq_wr_callback(DEVCB_##_write);
#define MCFG_VIC20_EXPANSION_SLOT_NMI_CALLBACK(_write) \
devcb = &downcast<vic20_expansion_slot_device &>(*device).set_nmi_wr_callback(DEVCB_##_write);
#define MCFG_VIC20_EXPANSION_SLOT_RES_CALLBACK(_write) \
devcb = &downcast<vic20_expansion_slot_device &>(*device).set_res_wr_callback(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
template <typename T>
vic20_expansion_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock, T &&opts, char const *dflt)
: vic20_expansion_slot_device(mconfig, tag, owner, clock)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
vic20_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
template <class Object> devcb_base &set_irq_wr_callback(Object &&cb) { return m_write_irq.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_nmi_wr_callback(Object &&cb) { return m_write_nmi.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_res_wr_callback(Object &&cb) { return m_write_res.set_callback(std::forward<Object>(cb)); }
// computer interface
uint8_t cd_r(address_space &space, offs_t offset, uint8_t 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_t 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_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 "vic1001_cart"; }
virtual const char *file_extensions() const override { return "20,40,60,70,a0,b0,crt"; }
// slot interface overrides
virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override;
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
virtual ~device_vic20_expansion_card_interface();
virtual uint8_t vic20_cd_r(address_space &space, offs_t offset, uint8_t 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_t data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { };
protected:
device_vic20_expansion_card_interface(const machine_config &mconfig, device_t &device);
optional_shared_ptr<uint8_t> m_blk1;
optional_shared_ptr<uint8_t> m_blk2;
optional_shared_ptr<uint8_t> m_blk3;
optional_shared_ptr<uint8_t> m_blk5;
optional_shared_ptr<uint8_t> m_nvram;
vic20_expansion_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(VIC20_EXPANSION_SLOT, vic20_expansion_slot_device)
void vic20_expansion_cards(device_slot_interface &device);
#endif // MAME_BUS_VIC20_EXP_H