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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
**********************************************************************/
#ifndef MAME_BUS_VIC20_EXP_H
#define MAME_BUS_VIC20_EXP_H
#pragma once
#include "imagedev/cartrom.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> vic20_expansion_slot_device
class device_vic20_expansion_card_interface;
class vic20_expansion_slot_device : public device_t,
public device_single_card_slot_interface<device_vic20_expansion_card_interface>,
public device_cartrom_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);
static void add_passthrough(machine_config &config, const char *_tag);
auto irq_wr_callback() { return m_write_irq.bind(); }
auto nmi_wr_callback() { return m_write_nmi.bind(); }
auto res_wr_callback() { return m_write_res.bind(); }
// computer interface
uint8_t cd_r(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(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_start() override;
virtual void device_reset() override;
// image-level overrides
virtual image_init_result call_load() override;
virtual bool is_reset_on_load() const noexcept override { return true; }
virtual const char *image_interface() const noexcept override { return "vic1001_cart"; }
virtual const char *file_extensions() const noexcept 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_interface
{
friend class vic20_expansion_slot_device;
public:
// construction/destruction
virtual ~device_vic20_expansion_card_interface();
virtual uint8_t vic20_cd_r(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(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);
std::unique_ptr<uint8_t[]> m_blk1;
std::unique_ptr<uint8_t[]> m_blk2;
std::unique_ptr<uint8_t[]> m_blk3;
std::unique_ptr<uint8_t[]> m_blk5;
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
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