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diff --git a/trunk/src/emu/machine/z80sti.h b/trunk/src/emu/machine/z80sti.h
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+/**********************************************************************
+
+ Mostek MK3801 Serial Timer Interrupt Controller (Z80-STI) emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+ _____ _____
+ TAO 1 |* \_/ | 40 Vcc
+ TBO 2 | | 39 RC
+ TCO 3 | | 38 SI
+ TDO 4 | | 37 SO
+ TCK 5 | | 36 TC
+ _M1 6 | | 35 A0
+ _RES 7 | | 34 A1
+ I0 8 | | 33 A2
+ I1 9 | | 32 A3
+ I2 10 | MK3801 | 31 _WR
+ I3 11 | Z80-STI | 30 _CE
+ I4 12 | | 29 _RD
+ I5 13 | | 28 D7
+ I6 14 | | 27 D6
+ I7 15 | | 26 D5
+ IEI 16 | | 25 D4
+ _INT 17 | | 24 D3
+ IEO 18 | | 23 D2
+ _IORQ 19 | | 22 D1
+ Vss 20 |_____________| 21 D0
+
+**********************************************************************/
+
+#ifndef __Z80STI__
+#define __Z80STI__
+
+#include "cpu/z80/z80daisy.h"
+
+
+//**************************************************************************
+// DEVICE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_Z80STI_ADD(_tag, _clock, _config) \
+ MCFG_DEVICE_ADD((_tag), Z80STI, _clock) \
+ MCFG_DEVICE_CONFIG(_config)
+
+#define Z80STI_INTERFACE(name) const z80sti_interface (name) =
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+
+// ======================> z80sti_interface
+
+struct z80sti_interface
+{
+ int m_rx_clock; // serial receive clock
+ int m_tx_clock; // serial transmit clock
+
+ // this gets called on each change of the _INT pin (pin 17)
+ devcb_write_line m_out_int_cb;
+
+ // this is called on each read of the GPIO pins
+ devcb_read8 m_in_gpio_cb;
+
+ // this is called on each write of the GPIO pins
+ devcb_write8 m_out_gpio_cb;
+
+ // this gets called for each read of the SI pin (pin 38)
+ devcb_read_line m_in_si_cb;
+
+ // this gets called for each change of the SO pin (pin 37)
+ devcb_write_line m_out_so_cb;
+
+ // this gets called for each change of the TAO pin (pin 1)
+ devcb_write_line m_out_tao_cb;
+
+ // this gets called for each change of the TBO pin (pin 2)
+ devcb_write_line m_out_tbo_cb;
+
+ // this gets called for each change of the TCO pin (pin 3)
+ devcb_write_line m_out_tco_cb;
+
+ // this gets called for each change of the TDO pin (pin 4)
+ devcb_write_line m_out_tdo_cb;
+};
+
+
+
+// ======================> z80sti_device
+
+class z80sti_device : public device_t,
+ public device_z80daisy_interface,
+ public z80sti_interface
+{
+public:
+ // construction/destruction
+ z80sti_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // I/O accessors
+ UINT8 read(offs_t offset);
+ void write(offs_t offset, UINT8 data);
+
+ // communication I/O
+ void serial_receive();
+ void serial_transmit();
+ void gpip_input(int bit, int state);
+
+private:
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_start();
+ virtual void device_reset();
+
+ // device_z80daisy_interface overrides
+ virtual int z80daisy_irq_state();
+ virtual int z80daisy_irq_ack();
+ virtual void z80daisy_irq_reti();
+
+ // internal helpers
+ void check_interrupts();
+ void take_interrupt(int level);
+
+ void timer_count(int index);
+
+ static TIMER_CALLBACK( static_rx_tick ) { reinterpret_cast<z80sti_device *>(ptr)->serial_receive(); }
+ static TIMER_CALLBACK( static_tx_tick ) { reinterpret_cast<z80sti_device *>(ptr)->serial_transmit(); }
+
+ static TIMER_CALLBACK( static_timer_count ) { reinterpret_cast<z80sti_device *>(ptr)->timer_count(param); }
+
+ // device callbacks
+ devcb_resolved_read8 m_in_gpio_func;
+ devcb_resolved_write8 m_out_gpio_func;
+ devcb_resolved_read_line m_in_si_func;
+ devcb_resolved_write_line m_out_so_func;
+ devcb_resolved_write_line m_out_timer_func[4];
+ devcb_resolved_write_line m_out_int_func;
+
+ // I/O state
+ UINT8 m_gpip; // general purpose I/O register
+ UINT8 m_aer; // active edge register
+ UINT8 m_ddr; // data direction register
+
+ // interrupt state
+ UINT16 m_ier; // interrupt enable register
+ UINT16 m_ipr; // interrupt pending register
+ UINT16 m_isr; // interrupt in-service register
+ UINT16 m_imr; // interrupt mask register
+ UINT8 m_pvr; // interrupt vector register
+ int m_int_state[16]; // interrupt state
+
+ // timer state
+ UINT8 m_tabc; // timer A/B control register
+ UINT8 m_tcdc; // timer C/D control register
+ UINT8 m_tdr[4]; // timer data registers
+ UINT8 m_tmc[4]; // timer main counters
+ int m_to[4]; // timer out latch
+
+ // serial state
+ UINT8 m_scr; // synchronous character register
+ UINT8 m_ucr; // USART control register
+ UINT8 m_tsr; // transmitter status register
+ UINT8 m_rsr; // receiver status register
+ UINT8 m_udr; // USART data register
+
+ // timers
+ emu_timer *m_timer[4]; // counter timers
+ emu_timer *m_rx_timer; // serial receive timer
+ emu_timer *m_tx_timer; // serial transmit timer
+};
+
+
+// device type definition
+extern const device_type Z80STI;
+
+
+
+//**************************************************************************
+// READ/WRITE HANDLERS
+//**************************************************************************
+
+// register access
+READ8_DEVICE_HANDLER( z80sti_r );
+WRITE8_DEVICE_HANDLER( z80sti_w );
+
+// receive clock
+WRITE_LINE_DEVICE_HANDLER( z80sti_rc_w );
+
+// transmit clock
+WRITE_LINE_DEVICE_HANDLER( z80sti_tc_w );
+
+// GPIP input lines
+WRITE_LINE_DEVICE_HANDLER( z80sti_i0_w );
+WRITE_LINE_DEVICE_HANDLER( z80sti_i1_w );
+WRITE_LINE_DEVICE_HANDLER( z80sti_i2_w );
+WRITE_LINE_DEVICE_HANDLER( z80sti_i3_w );
+WRITE_LINE_DEVICE_HANDLER( z80sti_i4_w );
+WRITE_LINE_DEVICE_HANDLER( z80sti_i5_w );
+WRITE_LINE_DEVICE_HANDLER( z80sti_i6_w );
+WRITE_LINE_DEVICE_HANDLER( z80sti_i7_w );
+
+
+#endif