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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore 64 Expansion Port emulation
**********************************************************************
GND 1 A GND
+5V 2 B _ROMH
+5V 3 C _RESET
_IRQ 4 D _NMI
_CR/W 5 E Sphi2
DOTCLK 6 F CA15
_I/O1 7 H CA14
_GAME 8 J CA13
_EXROM 9 K CA12
_I/O2 10 L CA11
_ROML 11 M CA10
BA 12 N CA9
_DMA 13 P CA8
CD7 14 R CA7
CD6 15 S CA6
CD5 16 T CA5
CD4 17 U CA4
CD3 18 V CA3
CD2 19 W CA2
CD1 20 X CA1
CD0 21 Y CA0
GND 22 Z GND
**********************************************************************/
#ifndef MAME_BUS_C64_EXP_H
#define MAME_BUS_C64_EXP_H
#pragma once
#include "softlist_dev.h"
#include "formats/cbm_crt.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> c64_expansion_slot_device
class device_c64_expansion_card_interface;
class c64_expansion_slot_device : public device_t,
public device_slot_interface,
public device_image_interface
{
public:
// construction/destruction
template <typename T>
c64_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&opts, const char *dflt)
: c64_expansion_slot_device(mconfig, tag, owner, clock)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
c64_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_reset_wr_callback(Object &&cb) { return m_write_reset.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_cd_rd_callback(Object &&cb) { return m_read_dma_cd.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_cd_wr_callback(Object &&cb) { return m_write_dma_cd.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_dma_wr_callback(Object &&cb) { return m_write_dma.set_callback(std::forward<Object>(cb)); }
auto irq_callback() { return m_write_irq.bind(); }
auto nmi_callback() { return m_write_nmi.bind(); }
auto reset_callback() { return m_write_reset.bind(); }
auto cd_input_callback() { return m_read_dma_cd.bind(); }
auto cd_output_callback() { return m_write_dma_cd.bind(); }
auto dma_callback() { return m_write_dma.bind(); }
// computer interface
uint8_t cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2);
void cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2);
int game_r(offs_t offset, int sphi2, int ba, int rw, int loram, int hiram);
int exrom_r(offs_t offset, int sphi2, int ba, int rw, int loram, int hiram);
// cartridge interface
uint8_t dma_cd_r(offs_t offset) { return m_read_dma_cd(offset); }
void dma_cd_w(offs_t offset, uint8_t data) { m_write_dma_cd(offset, data); }
DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); }
DECLARE_WRITE_LINE_MEMBER( nmi_w ) { m_write_nmi(state); }
DECLARE_WRITE_LINE_MEMBER( dma_w ) { m_write_dma(state); }
DECLARE_WRITE_LINE_MEMBER( reset_w ) { m_write_reset(state); }
int phi2() { return clock(); }
int dotclock() { return phi2() * 8; }
int hiram() { return m_hiram; }
int loram() { return m_loram; }
void set_passthrough();
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 "c64_cart,vic10_cart"; }
virtual const char *file_extensions() const override { return "80,a0,e0,crt"; }
// slot interface overrides
virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override;
devcb_read8 m_read_dma_cd;
devcb_write8 m_write_dma_cd;
devcb_write_line m_write_irq;
devcb_write_line m_write_nmi;
devcb_write_line m_write_dma;
devcb_write_line m_write_reset;
device_c64_expansion_card_interface *m_card;
int m_hiram;
int m_loram;
};
// ======================> device_c64_expansion_card_interface
class device_c64_expansion_card_interface : public device_slot_card_interface
{
friend class c64_expansion_slot_device;
public:
// construction/destruction
virtual ~device_c64_expansion_card_interface();
virtual uint8_t c64_cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { return data; };
virtual void c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { };
virtual int c64_game_r(offs_t offset, int sphi2, int ba, int rw) { return m_game; }
virtual int c64_exrom_r(offs_t offset, int sphi2, int ba, int rw) { return m_exrom; }
protected:
device_c64_expansion_card_interface(const machine_config &mconfig, device_t &device);
optional_shared_ptr<uint8_t> m_roml;
optional_shared_ptr<uint8_t> m_romh;
optional_shared_ptr<uint8_t> m_nvram;
int m_game;
int m_exrom;
c64_expansion_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(C64_EXPANSION_SLOT, c64_expansion_slot_device)
void c64_expansion_cards(device_slot_interface &device);
#endif
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