summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/machine/vic20exp.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/mess/machine/vic20exp.h')
-rw-r--r--src/mess/machine/vic20exp.h185
1 files changed, 185 insertions, 0 deletions
diff --git a/src/mess/machine/vic20exp.h b/src/mess/machine/vic20exp.h
new file mode 100644
index 00000000000..963235e48d6
--- /dev/null
+++ b/src/mess/machine/vic20exp.h
@@ -0,0 +1,185 @@
+/**********************************************************************
+
+ Commodore VIC-20 Expansion Port emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+
+ 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 VIC20_EXPANSION_INTERFACE(_name) \
+ const vic20_expansion_slot_interface (_name) =
+
+
+#define MCFG_VIC20_EXPANSION_SLOT_ADD(_tag, _config, _slot_intf, _def_slot, _def_inp) \
+ MCFG_DEVICE_ADD(_tag, VIC20_EXPANSION_SLOT, 0) \
+ MCFG_DEVICE_CONFIG(_config) \
+ MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false)
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> vic20_expansion_slot_interface
+
+struct vic20_expansion_slot_interface
+{
+ devcb_write_line m_out_irq_cb;
+ devcb_write_line m_out_nmi_cb;
+ devcb_write_line m_out_res_cb;
+};
+
+
+// ======================> vic20_expansion_slot_device
+
+class device_vic20_expansion_card_interface;
+
+class vic20_expansion_slot_device : public device_t,
+ public vic20_expansion_slot_interface,
+ 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);
+ virtual ~vic20_expansion_slot_device();
+
+ // computer interface
+ UINT8 cd_r(address_space &space, offs_t offset, 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);
+ UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ DECLARE_WRITE_LINE_MEMBER( port_res_w );
+
+ // cartridge interface
+ DECLARE_WRITE_LINE_MEMBER( irq_w );
+ DECLARE_WRITE_LINE_MEMBER( nmi_w );
+ DECLARE_WRITE_LINE_MEMBER( res_w );
+
+protected:
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_start();
+ virtual void device_reset();
+
+ // image-level overrides
+ virtual bool call_load();
+ virtual bool call_softlist_load(char *swlist, char *swname, 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 const char * get_default_card_software(const machine_config &config, emu_options &options);
+
+ devcb_resolved_write_line m_out_irq_func;
+ devcb_resolved_write_line m_out_nmi_func;
+ devcb_resolved_write_line m_out_res_func;
+
+ device_vic20_expansion_card_interface *m_cart;
+};
+
+
+// ======================> 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();
+
+protected:
+ // initialization
+ virtual UINT8* vic20_blk1_pointer(running_machine &machine, size_t size);
+ virtual UINT8* vic20_blk2_pointer(running_machine &machine, size_t size);
+ virtual UINT8* vic20_blk3_pointer(running_machine &machine, size_t size);
+ virtual UINT8* vic20_blk5_pointer(running_machine &machine, size_t size);
+ virtual UINT8* vic20_ram_pointer(running_machine &machine, size_t size);
+ virtual UINT8* vic20_nvram_pointer(running_machine &machine, size_t size);
+
+ // runtime
+ virtual UINT8 vic20_cd_r(address_space &space, offs_t offset, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { return 0; };
+ 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) { };
+ virtual UINT32 vic20_screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return 0; }
+ virtual void vic20_res_w(int state) { };
+
+ vic20_expansion_slot_device *m_slot;
+
+ UINT8 *m_blk1;
+ UINT8 *m_blk2;
+ UINT8 *m_blk3;
+ UINT8 *m_blk5;
+ UINT8 *m_ram;
+ UINT8 *m_nvram;
+
+ size_t m_nvram_size;
+
+ size_t m_nvram_mask;
+};
+
+
+// device type definition
+extern const device_type VIC20_EXPANSION_SLOT;
+
+
+
+#endif