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diff --git a/src/emu/machine/ay31015.h b/src/emu/machine/ay31015.h
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+/* ay31015.h
+
+ Written for MESS by Robbbert on May 29th, 2008.
+
+*/
+
+#ifndef __AY31015_H_
+#define __AY31015_H_
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+
+enum ay31015_type_t
+{
+ /* For AY-3-1014A, AY-3-1015(D) and HD6402 variants */
+ AY_3_1015,
+
+ /* For AY-3-1014, AY-5-1013 and AY-6-1013 variants */
+ AY_5_1013
+};
+
+
+enum ay31015_input_pin_t
+{
+ AY31015_SWE=16, /* -SWE - Pin 16 - Status word enable */
+ AY31015_RDAV=18, /* -RDAV - Pin 18 - Reset data available */
+ AY31015_SI=20, /* SI - Pin 20 - Serial input */
+ AY31015_XR=21, /* XR - Pin 21 - External reset */
+ AY31015_CS=34, /* CS - Pin 34 - Control strobe */
+ AY31015_NP=35, /* NP - Pin 35 - No parity */
+ AY31015_TSB=36, /* TSB - Pin 36 - Number of stop bits */
+ AY31015_NB1=37, /* NB1 - Pin 37 - Number of bits #1 */
+ AY31015_NB2=38, /* NB2 - Pin 38 - Number of bits #2 */
+ AY31015_EPS=39 /* EPS - Pin 39 - Odd/Even parity select */
+};
+
+
+enum ay31015_output_pin_t
+{
+ AY31015_PE=13, /* PE - Pin 13 - Parity error */
+ AY31015_FE=14, /* FE - Pin 14 - Framing error */
+ AY31015_OR=15, /* OR - Pin 15 - Over-run */
+ AY31015_DAV=19, /* DAV - Pin 19 - Data available */
+ AY31015_TBMT=22, /* TBMT - Pin 22 - Transmit buffer empty */
+ AY31015_EOC=24, /* EOC - Pin 24 - End of character */
+ AY31015_SO=25 /* SO - Pin 25 - Serial output */
+};
+
+
+struct ay31015_config
+{
+ ay31015_type_t type; /* Type of chip */
+ double transmitter_clock; /* TCP - pin 40 */
+ double receiver_clock; /* RCP - pin 17 */
+ devcb_read8 read_si_cb; /* SI - pin 20 - This will be called whenever the SI pin is sampled. Optional */
+ devcb_write8 write_so_cb; /* SO - pin 25 - This will be called whenever data is put on the SO pin. Optional */
+ devcb_write8 status_changed_cb; /* This will be called whenever one of the status pins may have changed. Optional */
+};
+
+
+/***************************************************************************
+ DEVICE CONFIGURATION MACROS
+***************************************************************************/
+
+#define MCFG_AY31015_ADD(_tag, _config) \
+ MCFG_DEVICE_ADD(_tag, AY31015, 0) \
+ MCFG_DEVICE_CONFIG(_config)
+
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+/* Set an input pin */
+void ay31015_set_input_pin( device_t *device, ay31015_input_pin_t pin, int data );
+
+
+/* Get an output pin */
+int ay31015_get_output_pin( device_t *device, ay31015_output_pin_t pin );
+
+
+/* Set a new transmitter clock (new_clock is in Hz) */
+void ay31015_set_transmitter_clock( device_t *device, double new_clock );
+
+
+/* Set a new receiver clock (new_clock is in Hz) */
+void ay31015_set_receiver_clock( device_t *device, double new_clock );
+
+
+/* Reead the received data */
+/* The received data is available on RD8-RD1 (pins 5-12) */
+UINT8 ay31015_get_received_data( device_t *device );
+
+
+/* Set the transmitter buffer */
+/* The data to transmit is set on DB1-DB8 (pins 26-33) */
+void ay31015_set_transmit_data( device_t *device, UINT8 data );
+
+
+/***************************************************************************
+ DEVICE INTERFACE
+***************************************************************************/
+
+class ay31015_device : public device_t
+{
+public:
+ ay31015_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+ ~ay31015_device() { global_free(m_token); }
+
+ // access to legacy token
+ void *token() const { assert(m_token != NULL); return m_token; }
+protected:
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_start();
+ virtual void device_reset();
+private:
+ // internal state
+ void *m_token;
+};
+
+extern const device_type AY31015;
+
+#endif