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diff --git a/trunk/src/emu/machine/mc6852.h b/trunk/src/emu/machine/mc6852.h
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+/**********************************************************************
+
+ Motorola MC6852 Synchronous Serial Data Adapter emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+ _____ _____
+ Vss 1 |* \_/ | 24 _CTS
+ Rx DATA 2 | | 23 _DCD
+ Rx CLK 3 | | 22 D0
+ Tx CLK 4 | | 21 D1
+ SM/_DTR 5 | | 20 D2
+ Tx DATA 6 | MC6852 | 19 D3
+ _IRQ 7 | | 18 D4
+ TUF 8 | | 17 D5
+ _RESET 9 | | 16 D6
+ _CS 9 | | 15 D7
+ RS 9 | | 14 E
+ Vcc 10 |_____________| 13 R/_W
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __MC6852__
+#define __MC6852__
+
+#include "emu.h"
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_MC6852_ADD(_tag, _clock, _config) \
+ MCFG_DEVICE_ADD((_tag), MC6852, _clock) \
+ MCFG_DEVICE_CONFIG(_config)
+
+#define MC6852_INTERFACE(name) \
+ const mc6852_interface (name) =
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> mc6852_interface
+
+struct mc6852_interface
+{
+ UINT32 m_rx_clock;
+ UINT32 m_tx_clock;
+
+ devcb_read_line m_in_rx_data_cb;
+ devcb_write_line m_out_tx_data_cb;
+
+ devcb_write_line m_out_irq_cb;
+
+ devcb_read_line m_in_cts_cb;
+ devcb_read_line m_in_dcd_cb;
+ devcb_write_line m_out_sm_dtr_cb;
+ devcb_write_line m_out_tuf_cb;
+};
+
+
+// ======================> mc6852_device
+
+class mc6852_device : public device_t,
+ public mc6852_interface
+{
+public:
+ // construction/destruction
+ mc6852_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+
+ DECLARE_WRITE_LINE_MEMBER( rx_clk_w );
+ DECLARE_WRITE_LINE_MEMBER( tx_clk_w );
+ DECLARE_WRITE_LINE_MEMBER( cts_w );
+ DECLARE_WRITE_LINE_MEMBER( dcd_w );
+
+ DECLARE_READ_LINE_MEMBER( sm_dtr_r );
+ DECLARE_READ_LINE_MEMBER( tuf_r );
+
+protected:
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int m_param, void *ptr);
+
+private:
+ static const device_timer_id TIMER_RX = 0;
+ static const device_timer_id TIMER_TX = 1;
+
+ inline void receive();
+ inline void transmit();
+
+ devcb_resolved_read_line m_in_rx_data_func;
+ devcb_resolved_write_line m_out_tx_data_func;
+ devcb_resolved_write_line m_out_irq_func;
+ devcb_resolved_read_line m_in_cts_func;
+ devcb_resolved_read_line m_in_dcd_func;
+ devcb_resolved_write_line m_out_sm_dtr_func;
+ devcb_resolved_write_line m_out_tuf_func;
+
+ // registers
+ UINT8 m_status; // status register
+ UINT8 m_cr[3]; // control registers
+ UINT8 m_scr; // sync code register
+ UINT8 m_rx_fifo[3]; // receiver FIFO
+ UINT8 m_tx_fifo[3]; // transmitter FIFO
+ UINT8 m_tdr; // transmit data register
+ UINT8 m_tsr; // transmit shift register
+ UINT8 m_rdr; // receive data register
+ UINT8 m_rsr; // receive shift register
+
+ int m_cts; // clear to send
+ int m_dcd; // data carrier detect
+ int m_sm_dtr; // sync match/data terminal ready
+ int m_tuf; // transmitter underflow
+
+ // timers
+ emu_timer *m_rx_timer;
+ emu_timer *m_tx_timer;
+};
+
+
+// device type definition
+extern const device_type MC6852;
+
+
+
+#endif