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-rw-r--r--src/devices/bus/vic20/exp.h172
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diff --git a/src/devices/bus/vic20/exp.h b/src/devices/bus/vic20/exp.h
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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 NULL; }
+
+ // 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