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diff --git a/src/mess/machine/cbmiec.h b/src/mess/machine/cbmiec.h
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+/**********************************************************************
+
+ Commodore IEC Serial Bus emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __CBM_IEC__
+#define __CBM_IEC__
+
+#include "emu.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define CBM_IEC_TAG "iec_bus"
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_CBM_IEC_BUS_ADD(_config) \
+ MCFG_DEVICE_ADD(CBM_IEC_TAG, CBM_IEC, 0) \
+ MCFG_DEVICE_CONFIG(_config)
+
+
+#define CBM_IEC_INTERFACE(_name) \
+ const cbm_iec_interface (_name) =
+
+
+#define MCFG_CBM_IEC_SLOT_ADD(_tag, _num, _slot_intf, _def_slot, _def_inp) \
+ MCFG_DEVICE_ADD(_tag, CBM_IEC_SLOT, 0) \
+ MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false) \
+ cbm_iec_slot_device::static_set_slot(*device, _num);
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> cbm_iec_interface
+
+struct cbm_iec_interface
+{
+ devcb_write_line m_out_srq_cb;
+ devcb_write_line m_out_atn_cb;
+ devcb_write_line m_out_clk_cb;
+ devcb_write_line m_out_data_cb;
+ devcb_write_line m_out_reset_cb;
+};
+
+
+// ======================> cbm_iec_device
+
+class device_cbm_iec_interface;
+
+class cbm_iec_device : public device_t,
+ public cbm_iec_interface
+{
+public:
+ // construction/destruction
+ cbm_iec_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ void add_device(device_t *target, int address);
+
+ // reads for both host and peripherals
+ DECLARE_READ_LINE_MEMBER( srq_r );
+ DECLARE_READ_LINE_MEMBER( atn_r );
+ DECLARE_READ_LINE_MEMBER( clk_r );
+ DECLARE_READ_LINE_MEMBER( data_r );
+ DECLARE_READ_LINE_MEMBER( reset_r );
+
+ // writes for host (driver_device)
+ DECLARE_WRITE_LINE_MEMBER( srq_w );
+ DECLARE_WRITE_LINE_MEMBER( atn_w );
+ DECLARE_WRITE_LINE_MEMBER( clk_w );
+ DECLARE_WRITE_LINE_MEMBER( data_w );
+ DECLARE_WRITE_LINE_MEMBER( reset_w );
+
+ // writes for peripherals (device_t)
+ void srq_w(device_t *device, int state);
+ void atn_w(device_t *device, int state);
+ void clk_w(device_t *device, int state);
+ void data_w(device_t *device, int state);
+ void reset_w(device_t *device, int state);
+
+protected:
+ enum
+ {
+ SRQ = 0,
+ ATN,
+ CLK,
+ DATA,
+ RESET,
+ SIGNAL_COUNT
+ };
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_config_complete();
+ virtual void device_stop();
+
+ class daisy_entry
+ {
+ public:
+ daisy_entry(device_t *device);
+ daisy_entry *next() const { return m_next; }
+
+ daisy_entry * m_next; // next device
+ device_t * m_device; // associated device
+ device_cbm_iec_interface * m_interface; // associated device's daisy interface
+
+ int m_line[SIGNAL_COUNT];
+ };
+
+ simple_list<daisy_entry> m_device_list;
+
+private:
+ devcb_resolved_write_line m_out_atn_func;
+ devcb_resolved_write_line m_out_clk_func;
+ devcb_resolved_write_line m_out_data_func;
+ devcb_resolved_write_line m_out_srq_func;
+ devcb_resolved_write_line m_out_reset_func;
+
+ inline void set_signal(device_t *device, int signal, int state);
+ inline int get_signal(int signal);
+
+ int m_line[SIGNAL_COUNT];
+};
+
+
+// ======================> cbm_iec_slot_device
+
+class cbm_iec_slot_device : public device_t,
+ public device_slot_interface
+{
+public:
+ // construction/destruction
+ cbm_iec_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+
+ // inline configuration
+ static void static_set_slot(device_t &device, int address);
+
+private:
+ // configuration
+ int m_address;
+ cbm_iec_device *m_bus;
+};
+
+
+// ======================> device_cbm_iec_interface
+
+class device_cbm_iec_interface : public device_slot_card_interface
+{
+ friend class cbm_iec_device;
+
+public:
+ // construction/destruction
+ device_cbm_iec_interface(const machine_config &mconfig, device_t &device);
+ virtual ~device_cbm_iec_interface();
+
+ device_cbm_iec_interface *next() const { return m_next; }
+ device_cbm_iec_interface *m_next;
+
+ // optional operation overrides
+ virtual void cbm_iec_atn(int state) { };
+ virtual void cbm_iec_clk(int state) { };
+ virtual void cbm_iec_data(int state) { };
+ virtual void cbm_iec_srq(int state) { };
+ virtual void cbm_iec_reset(int state) { };
+
+ cbm_iec_device *m_bus;
+ int m_address;
+};
+
+
+// device type definition
+extern const device_type CBM_IEC;
+extern const device_type CBM_IEC_SLOT;
+
+
+
+#endif