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-rw-r--r--src/mess/machine/cococart.h174
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diff --git a/src/mess/machine/cococart.h b/src/mess/machine/cococart.h
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+/*********************************************************************
+
+ cococart.h
+
+ CoCo/Dragon cartridge management
+
+*********************************************************************/
+
+#ifndef __COCOCART_H__
+#define __COCOCART_H__
+
+#include "image.h"
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+/* TIMER_POOL: Must be power of two */
+#define TIMER_POOL 2
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+/* output lines on the CoCo cartridge slot */
+enum _cococart_line
+{
+ COCOCART_LINE_CART, /* connects to PIA1 CB1 */
+ COCOCART_LINE_NMI, /* connects to NMI line on CPU */
+ COCOCART_LINE_HALT, /* connects to HALT line on CPU */
+ COCOCART_LINE_SOUND_ENABLE /* sound enable */
+};
+typedef enum _cococart_line cococart_line;
+
+/* since we have a special value "Q" - we have to use a special enum here */
+enum _cococart_line_value
+{
+ COCOCART_LINE_VALUE_CLEAR,
+ COCOCART_LINE_VALUE_ASSERT,
+ COCOCART_LINE_VALUE_Q
+};
+typedef enum _cococart_line_value cococart_line_value;
+
+typedef struct _coco_cartridge_line coco_cartridge_line;
+struct _coco_cartridge_line
+{
+ emu_timer *timer[TIMER_POOL];
+ int timer_index;
+ int delay;
+ cococart_line_value value;
+ int line;
+ int q_count;
+ devcb_resolved_write_line callback;
+};
+
+// ======================> cococart_interface
+
+struct cococart_interface
+{
+ devcb_write_line m_cart_callback;
+ devcb_write_line m_nmi_callback;
+ devcb_write_line m_halt_callback;
+};
+
+// ======================> cococart_base_update_delegate
+
+// direct region update handler
+typedef delegate<void (UINT8 *)> cococart_base_update_delegate;
+
+
+// ======================> cococart_slot_device
+class device_cococart_interface;
+
+class cococart_slot_device : public device_t,
+ public cococart_interface,
+ public device_slot_interface,
+ public device_image_interface
+{
+public:
+ // construction/destruction
+ cococart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+ virtual ~cococart_slot_device();
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_config_complete();
+
+ // 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 "coco_cart"; }
+ virtual const char *file_extensions() const { return "ccc,rom"; }
+ 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);
+
+ /* reading and writing to $FF40-$FF7F */
+ DECLARE_READ8_MEMBER(read);
+ DECLARE_WRITE8_MEMBER(write);
+
+ /* sets a cartridge line */
+ void cart_set_line(cococart_line line, cococart_line_value value);
+
+ /* hack to support twiddling the Q line */
+ void twiddle_q_lines();
+
+ /* cart base */
+ UINT8* get_cart_base();
+ void set_cart_base_update(cococart_base_update_delegate update);
+
+protected:
+ static TIMER_CALLBACK( cart_timer_callback );
+ static TIMER_CALLBACK( nmi_timer_callback );
+ static TIMER_CALLBACK( halt_timer_callback );
+
+ void set_line(const char *line_name, coco_cartridge_line *line, cococart_line_value value);
+ void set_line_timer(coco_cartridge_line *line, cococart_line_value value);
+ void twiddle_line_if_q(coco_cartridge_line *line);
+
+ // configuration
+ coco_cartridge_line m_cart_line;
+ coco_cartridge_line m_nmi_line;
+ coco_cartridge_line m_halt_line;
+
+ device_cococart_interface *m_cart;
+};
+
+// device type definition
+extern const device_type COCOCART_SLOT;
+
+// ======================> device_cococart_interface
+
+class device_cococart_interface : public device_slot_card_interface
+{
+public:
+ // construction/destruction
+ device_cococart_interface(const machine_config &mconfig, device_t &device);
+ virtual ~device_cococart_interface();
+
+ virtual DECLARE_READ8_MEMBER(read);
+ virtual DECLARE_WRITE8_MEMBER(write);
+
+ virtual UINT8* get_cart_base();
+ void set_cart_base_update(cococart_base_update_delegate update);
+
+protected:
+ void cart_base_changed(void);
+
+private:
+ cococart_base_update_delegate m_update;
+};
+
+/***************************************************************************
+ DEVICE CONFIGURATION MACROS
+***************************************************************************/
+
+#define MCFG_COCO_CARTRIDGE_ADD(_tag,_config,_slot_intf,_def_slot, _def_inp) \
+ MCFG_DEVICE_ADD(_tag, COCOCART_SLOT, 0) \
+ MCFG_DEVICE_CONFIG(_config) \
+ MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false)
+
+#define MCFG_COCO_CARTRIDGE_REMOVE(_tag) \
+ MCFG_DEVICE_REMOVE(_tag)
+
+#endif /* __COCOCART_H__ */