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diff --git a/src/devices/bus/c64/exp.h b/src/devices/bus/c64/exp.h
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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
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __C64_EXPANSION_SLOT__
+#define __C64_EXPANSION_SLOT__
+
+#include "emu.h"
+#include "formats/cbm_crt.h"
+
+
+
+//**************************************************************************
+// CONSTANTS
+//**************************************************************************
+
+#define C64_EXPANSION_SLOT_TAG "exp"
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_C64_EXPANSION_SLOT_ADD(_tag, _clock, _slot_intf, _def_slot) \
+ MCFG_DEVICE_ADD(_tag, C64_EXPANSION_SLOT, _clock) \
+ MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
+
+#define MCFG_C64_PASSTHRU_EXPANSION_SLOT_ADD() \
+ MCFG_C64_EXPANSION_SLOT_ADD(C64_EXPANSION_SLOT_TAG, 0, c64_expansion_cards, NULL) \
+ MCFG_C64_EXPANSION_SLOT_IRQ_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, irq_w)) \
+ MCFG_C64_EXPANSION_SLOT_NMI_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, nmi_w)) \
+ MCFG_C64_EXPANSION_SLOT_RESET_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, reset_w)) \
+ MCFG_C64_EXPANSION_SLOT_CD_INPUT_CALLBACK(DEVREAD8(DEVICE_SELF_OWNER, c64_expansion_slot_device, dma_cd_r)) \
+ MCFG_C64_EXPANSION_SLOT_CD_OUTPUT_CALLBACK(DEVWRITE8(DEVICE_SELF_OWNER, c64_expansion_slot_device, dma_cd_w)) \
+ MCFG_C64_EXPANSION_SLOT_DMA_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, dma_w))
+
+
+#define MCFG_C64_EXPANSION_SLOT_IRQ_CALLBACK(_write) \
+ devcb = &c64_expansion_slot_device::set_irq_wr_callback(*device, DEVCB_##_write);
+
+#define MCFG_C64_EXPANSION_SLOT_NMI_CALLBACK(_write) \
+ devcb = &c64_expansion_slot_device::set_nmi_wr_callback(*device, DEVCB_##_write);
+
+#define MCFG_C64_EXPANSION_SLOT_RESET_CALLBACK(_write) \
+ devcb = &c64_expansion_slot_device::set_reset_wr_callback(*device, DEVCB_##_write);
+
+#define MCFG_C64_EXPANSION_SLOT_CD_INPUT_CALLBACK(_read) \
+ devcb = &c64_expansion_slot_device::set_cd_rd_callback(*device, DEVCB_##_read);
+
+#define MCFG_C64_EXPANSION_SLOT_CD_OUTPUT_CALLBACK(_write) \
+ devcb = &c64_expansion_slot_device::set_cd_wr_callback(*device, DEVCB_##_write);
+
+#define MCFG_C64_EXPANSION_SLOT_DMA_CALLBACK(_write) \
+ devcb = &c64_expansion_slot_device::set_dma_wr_callback(*device, DEVCB_##_write);
+
+
+
+//**************************************************************************
+// 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
+ c64_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<c64_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<c64_expansion_slot_device &>(device).m_write_nmi.set_callback(object); }
+ template<class _Object> static devcb_base &set_reset_wr_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_write_reset.set_callback(object); }
+ template<class _Object> static devcb_base &set_cd_rd_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_read_dma_cd.set_callback(object); }
+ template<class _Object> static devcb_base &set_cd_wr_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_write_dma_cd.set_callback(object); }
+ template<class _Object> static devcb_base &set_dma_wr_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_write_dma.set_callback(object); }
+
+ // computer interface
+ UINT8 cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2);
+ void cd_w(address_space &space, offs_t offset, UINT8 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 hiram);
+ int exrom_r(offs_t offset, int sphi2, int ba, int rw, int hiram);
+
+ // cartridge interface
+ DECLARE_READ8_MEMBER( dma_cd_r ) { return m_read_dma_cd(offset); }
+ DECLARE_WRITE8_MEMBER( dma_cd_w ) { 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; }
+
+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 "c64_cart,vic10_cart"; }
+ virtual const char *file_extensions() const { return "80,a0,e0,crt"; }
+ virtual const option_guide *create_option_guide() const { return NULL; }
+
+ // slot interface overrides
+ virtual void get_default_card_software(std::string &result);
+
+ 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;
+};
+
+
+// ======================> 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
+ device_c64_expansion_card_interface(const machine_config &mconfig, device_t &device);
+ virtual ~device_c64_expansion_card_interface();
+
+ virtual UINT8 c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { return data; };
+ virtual void c64_cd_w(address_space &space, offs_t offset, UINT8 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:
+ optional_shared_ptr<UINT8> m_roml;
+ optional_shared_ptr<UINT8> m_romh;
+ optional_shared_ptr<UINT8> m_nvram;
+
+ int m_game;
+ int m_exrom;
+
+ c64_expansion_slot_device *m_slot;
+};
+
+
+// device type definition
+extern const device_type C64_EXPANSION_SLOT;
+
+SLOT_INTERFACE_EXTERN( c64_expansion_cards );
+
+
+
+#endif