// license:BSD-3-Clause
// copyright-holders:Curt Coder, Joakim Larsson Edstrom
/***************************************************************************
Z80-SIO Serial Input/Output
****************************************************************************
_____ _____ _____ _____
D1 1|* \_/ |40 D0 _/ |40 D0 _/ |40 D0
D3 2| |39 D2 : |39 D2 : |39 D2
D5 3| |38 D4 : |38 D4 : |38 D4
D7 4| |37 D6 : |37 D6 : |37 D6
_INT 5| |36 _IORQ : |36 _IORQ : |36 _IORQ
IEO 6| |35 _CE : |35 _CE : |35 _CE
IEI 7| |34 B/_A : |34 B/_A : |34 B/_A
_M1 8| |33 C/_D : |33 C/_D : |33 C/_D
VDD 9| DIP40 |32 _RD : DIP40 |32 _RD : DIP40 |32 _RD
_W//RDYA 10| Z80 |31 GND : Z80 |31 GND : Z80 |31 GND
_SYNCA 11| SIO/0 |30 _W/_RDYB: SIO/1 |30 _W/_RDYB: SIO/2 |30 _W/_RDYB
RxDA 12| |29 _SYNCB : |29 _SYNCB : |29 _SYNCB
_RxCA 13| |28 RxDB : |28 RxDB : |28 _RxCB
_TxCA 14| |27 _RxTxCB : |27 _RxCB : |27 _TxCB
TxDA 15| |26 TxDB : |26 _TxCB : |26 TxDB
_DTRA 16| |25 _DTRB : |25 TxD_B : |25 _DTRB
_RTSA 17| |24 _RTSB : |24 _RTSB : |24 _RTSB
_CTSA 18| |23 _CTSB : |23 _CTSB : |23 _CTSB
_DCDA 19| |22 _DCDB : |22 _DCDB : |22 _DCDB
CLK 20|_____________|21 _RESET :_______|21 _RESET :_______|21 _RESET
*I *I
*I N O *I O
N D D D D / D D D D R N D D D D D D D D R*C
T 7 5 3 1 C 0 2 4 6 Q T 7 5 3 1 0 2 4 6 Q E
+----------------------+ +----------------------+
IEI|34 22| *CE IEI|6 5 4 3 2 1 44 42 40|B/ *A
IEO|35 21| B/ *A IEO|8 43 41 |C/ *D
*M1| | C/ *D *M1|9 37|*RD
+5v| | *RD +5V|10 36|GND
*W/ *RDYA| QFP44 | GND *W/ *RDYA|11 PLCC44 35|*W/ *RDYB
N/C| Z80 SIO/3 | N/C *SYNCA|12 Z80 SIO/4 34|*SYNCB
*SYNCA| Z804C43 | *W/ *RDYB RxDA|13 33|RxDB
RxDA| | *SYNCB *RxCA|14 32|*RxCB
*RxCA|42 | RxDB *TxCA|15 31|*TxCB
*TxCA|43 1 1 | *RxCB TxDA| 19 21 23 25 30|TxDB
TxDA`. 2 3 4 5 6 7 8 9 0 1 | *TxCB N/C|18 20 22 24 26 29|N/C
`--------------------+ +----------------------+
*D*R*C*D C*R*D*C*R*D*T *D*R*C*D C*R*D*C*R*D N
T T T C L E C*T T T x T T T C L E C T T T /
R S S D K S D S S R D R S S D K S D S S R C
A A A A E B B B B B A A A A E B B B B
T T
***************************************************************************/
#ifndef __Z80SIO_H__
#define __Z80SIO_H__
#include "emu.h"
#include "cpu/z80/z80daisy.h"
//**************************************************************************
// DEVICE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_Z80SIO_ADD(_tag, _clock, _rxa, _txa, _rxb, _txb) \
MCFG_DEVICE_ADD(_tag, Z80SIO, _clock) \
MCFG_Z80SIO_OFFSETS(_rxa, _txa, _rxb, _txb)
#define MCFG_Z80SIO_OFFSETS(_rxa, _txa, _rxb, _txb) \
z80sio_device::configure_channels(*device, _rxa, _txa, _rxb, _txb);
#define MCFG_Z80SIO_OUT_TXDA_CB(_devcb) \
devcb = &z80sio_device::set_out_txda_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_DTRA_CB(_devcb) \
devcb = &z80sio_device::set_out_dtra_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_RTSA_CB(_devcb) \
devcb = &z80sio_device::set_out_rtsa_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_WRDYA_CB(_devcb) \
devcb = &z80sio_device::set_out_wrdya_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_SYNCA_CB(_devcb) \
devcb = &z80sio_device::set_out_synca_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_TXDB_CB(_devcb) \
devcb = &z80sio_device::set_out_txdb_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_DTRB_CB(_devcb) \
devcb = &z80sio_device::set_out_dtrb_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_RTSB_CB(_devcb) \
devcb = &z80sio_device::set_out_rtsb_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_WRDYB_CB(_devcb) \
devcb = &z80sio_device::set_out_wrdyb_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_SYNCB_CB(_devcb) \
devcb = &z80sio_device::set_out_syncb_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_INT_CB(_devcb) \
devcb = &z80sio_device::set_out_int_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_RXDRQA_CB(_devcb) \
devcb = &z80sio_device::set_out_rxdrqa_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_TXDRQA_CB(_devcb) \
devcb = &z80sio_device::set_out_txdrqa_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_RXDRQB_CB(_devcb) \
devcb = &z80sio_device::set_out_rxdrqb_callback(*device, DEVCB_##_devcb);
#define MCFG_Z80SIO_OUT_TXDRQB_CB(_devcb) \
devcb = &z80sio_device::set_out_txdrqb_callback(*device, DEVCB_##_devcb);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> z80sio_channel
class z80sio_device;
class z80sio_channel : public device_t,
public device_serial_interface
{
friend class z80sio_device;
public:
z80sio_channel(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
// device_serial_interface overrides
virtual void tra_callback() override;
virtual void tra_complete() override;
virtual void rcv_callback() override;
virtual void rcv_complete() override;
// read register handlers
UINT8 do_sioreg_rr0();
UINT8 do_sioreg_rr1();
UINT8 do_sioreg_rr2();
// write register handlers
void do_sioreg_wr0(UINT8 data);
void do_sioreg_wr0_resets(UINT8 data);
void do_sioreg_wr1(UINT8 data);
void do_sioreg_wr2(UINT8 data);
void do_sioreg_wr3(UINT8 data);
void do_sioreg_wr4(UINT8 data);
void do_sioreg_wr5(UINT8 data);
void do_sioreg_wr6(UINT8 data);
void do_sioreg_wr7(UINT8 data);
UINT8 control_read();
void control_write(UINT8 data);
UINT8 data_read();
void data_write(UINT8 data);
void receive_data(UINT8 data);
DECLARE_WRITE_LINE_MEMBER( write_rx );
DECLARE_WRITE_LINE_MEMBER( cts_w );
DECLARE_WRITE_LINE_MEMBER( dcd_w );
//DECLARE_WRITE_LINE_MEMBER( ri_w );
DECLARE_WRITE_LINE_MEMBER( rxc_w );
DECLARE_WRITE_LINE_MEMBER( txc_w );
DECLARE_WRITE_LINE_MEMBER( sync_w );
int m_rxc;
int m_txc;
// Register state
// read registers enum
UINT8 m_rr0; // REG_RR0_STATUS
UINT8 m_rr1; // REG_RR1_SPEC_RCV_COND
UINT8 m_rr2; // REG_RR2_INTERRUPT_VECT
// write registers enum
UINT8 m_wr0; // REG_WR0_COMMAND_REGPT
UINT8 m_wr1; // REG_WR1_INT_DMA_ENABLE
UINT8 m_wr2; // REG_WR2_INT_VECTOR
UINT8 m_wr3; // REG_WR3_RX_CONTROL
UINT8 m_wr4; // REG_WR4_RX_TX_MODES
UINT8 m_wr5; // REG_WR5_TX_CONTROL
UINT8 m_wr6; // REG_WR6_SYNC_OR_SDLC_A
UINT8 m_wr7; // REG_WR7_SYNC_OR_SDLC_F
int m_variant; // Set in device
protected:
enum
{
INT_TRANSMIT = 0,
INT_EXTERNAL,
INT_RECEIVE,
INT_SPECIAL
};
// Read registers
enum
{
REG_RR0_STATUS = 0,
REG_RR1_SPEC_RCV_COND = 1,
REG_RR2_INTERRUPT_VECT = 2
};
// Write registers
enum
{
REG_WR0_COMMAND_REGPT = 0,
REG_WR1_INT_DMA_ENABLE = 1,
REG_WR2_INT_VECTOR = 2,
REG_WR3_RX_CONTROL = 3,
REG_WR4_RX_TX_MODES = 4,
REG_WR5_TX_CONTROL = 5,
REG_WR6_SYNC_OR_SDLC_A = 6,
REG_WR7_SYNC_OR_SDLC_F = 7
};
enum
{
RR0_RX_CHAR_AVAILABLE = 0x01,
RR0_INTERRUPT_PENDING = 0x02,
RR0_TX_BUFFER_EMPTY = 0x04,
RR0_DCD = 0x08,
RR0_SYNC_HUNT = 0x10,
RR0_CTS = 0x20,
RR0_TX_UNDERRUN = 0x40,
RR0_BREAK_ABORT = 0x80
};
enum
{
RR1_ALL_SENT = 0x01,
RR1_RESIDUE_CODE_MASK = 0x0e,
RR1_PARITY_ERROR = 0x10,
RR1_RX_OVERRUN_ERROR = 0x20,
RR1_CRC_FRAMING_ERROR = 0x40,
RR1_END_OF_FRAME = 0x80
};
enum
{ // TODO: overload SIO functionality
RR2_INT_VECTOR_MASK = 0xff, // SCC channel A, SIO channel B (special case)
RR2_INT_VECTOR_V1 = 0x02, // SIO (special case) /SCC Channel B
RR2_INT_VECTOR_V2 = 0x04, // SIO (special case) /SCC Channel B
RR2_INT_VECTOR_V3 = 0x08 // SIO (special case) /SCC Channel B
};
enum
{
WR0_REGISTER_MASK = 0x07,
WR0_COMMAND_MASK = 0x38,
WR0_NULL = 0x00,
WR0_SEND_ABORT = 0x08, // not supported
WR0_RESET_EXT_STATUS = 0x10,
WR0_CHANNEL_RESET = 0x18,
WR0_ENABLE_INT_NEXT_RX = 0x20,
WR0_RESET_TX_INT = 0x28, // not supported
WR0_ERROR_RESET = 0x30,
WR0_RETURN_FROM_INT = 0x38, // not supported
WR0_CRC_RESET_CODE_MASK = 0xc0, // not supported
WR0_CRC_RESET_NULL = 0x00, // not supported
WR0_CRC_RESET_RX = 0x40, // not supported
WR0_CRC_RESET_TX = 0x80, // not supported
WR0_CRC_RESET_TX_UNDERRUN = 0xc0 // not supported
};
enum
{
WR1_EXT_INT_ENABLE = 0x01,
WR1_TX_INT_ENABLE = 0x02,
WR1_STATUS_VECTOR = 0x04,
WR1_RX_INT_MODE_MASK = 0x18,
WR1_RX_INT_DISABLE = 0x00,
WR1_RX_INT_FIRST = 0x08,
WR1_RX_INT_ALL_PARITY = 0x10, // not supported
WR1_RX_INT_ALL = 0x18,
WR1_WRDY_ON_RX_TX = 0x20, // not supported
WR1_WRDY_FUNCTION = 0x40, // not supported
WR1_WRDY_ENABLE = 0x80 // not supported
};
enum
{
WR2_DATA_XFER_INT = 0x00, // not supported
WR2_DATA_XFER_DMA_INT = 0x01, // not supported
WR2_DATA_XFER_DMA = 0x02, // not supported
WR2_DATA_XFER_ILLEGAL = 0x03, // not supported
WR2_DATA_XFER_MASK = 0x03, // not supported
WR2_PRIORITY = 0x04, // not supported
WR2_MODE_8085_1 = 0x00, // not supported
WR2_MODE_8085_2 = 0x08, // not supported
WR2_MODE_8086_8088 = 0x10, // not supported
WR2_MODE_ILLEGAL = 0x18, // not supported
WR2_MODE_MASK = 0x18, // not supported
WR2_VECTORED_INT = 0x20, // not supported
WR2_PIN10_SYNDETB_RTSB = 0x80 // not supported
};
enum
{
WR3_RX_ENABLE = 0x01,
WR3_SYNC_CHAR_LOAD_INHIBIT= 0x02, // not supported
WR3_ADDRESS_SEARCH_MODE = 0x04, // not supported
WR3_RX_CRC_ENABLE = 0x08, // not supported
WR3_ENTER_HUNT_PHASE = 0x10, // not supported
WR3_AUTO_ENABLES = 0x20,
WR3_RX_WORD_LENGTH_MASK = 0xc0,
WR3_RX_WORD_LENGTH_5 = 0x00,
WR3_RX_WORD_LENGTH_7 = 0x40,
WR3_RX_WORD_LENGTH_6 = 0x80,
WR3_RX_WORD_LENGTH_8 = 0xc0
};
enum
{
WR4_PARITY_ENABLE = 0x01,
WR4_PARITY_EVEN = 0x02,
WR4_STOP_BITS_MASK = 0x0c,
WR4_STOP_BITS_1 = 0x04,
WR4_STOP_BITS_1_5 = 0x08, // not supported
WR4_STOP_BITS_2 = 0x0c,
WR4_SYNC_MODE_MASK = 0x30, // not supported
WR4_SYNC_MODE_8_BIT = 0x00, // not supported
WR4_SYNC_MODE_16_BIT = 0x10, // not supported
WR4_SYNC_MODE_SDLC = 0x20, // not supported
WR4_SYNC_MODE_EXT = 0x30, // not supported
WR4_CLOCK_RATE_MASK = 0xc0,
WR4_CLOCK_RATE_X1 = 0x00,
WR4_CLOCK_RATE_X16 = 0x40,
WR4_CLOCK_RATE_X32 = 0x80,
WR4_CLOCK_RATE_X64 = 0xc0
};
enum
{
WR5_TX_CRC_ENABLE = 0x01, // not supported
WR5_RTS = 0x02,
WR5_CRC16 = 0x04, // not supported
WR5_TX_ENABLE = 0x08,
WR5_SEND_BREAK = 0x10,
WR5_TX_WORD_LENGTH_MASK = 0x60,
WR5_TX_WORD_LENGTH_5 = 0x00,
WR5_TX_WORD_LENGTH_6 = 0x40,
WR5_TX_WORD_LENGTH_7 = 0x20,
WR5_TX_WORD_LENGTH_8 = 0x60,
WR5_DTR = 0x80
};
void update_serial();
void update_rts();
void set_dtr(int state);
void set_rts(int state);
int get_clock_mode();
stop_bits_t get_stop_bits();
int get_rx_word_length();
int get_tx_word_length();
// receiver state
UINT8 m_rx_data_fifo[3]; // receive data FIFO
UINT8 m_rx_error_fifo[3]; // receive error FIFO
UINT8 m_rx_error; // current receive error
int m_rx_fifo; // receive FIFO pointer
int m_rx_clock; // receive clock pulse count
int m_rx_first; // first character received
int m_rx_break; // receive break condition
UINT8 m_rx_rr0_latch; // read register 0 latched
int m_rxd;
int m_sh; // sync hunt
int m_cts; // clear to send latch
int m_dcd; // data carrier detect latch
// transmitter state
UINT8 m_tx_data; // transmit data register
int m_tx_clock; // transmit clock pulse count
int m_dtr; // data terminal ready
int m_rts; // request to send
// synchronous state
UINT16 m_sync; // sync character
int m_index;
z80sio_device *m_uart;
};
// ======================> z80sio_device
class z80sio_device : public device_t,
public device_z80daisy_interface
{
friend class z80sio_channel;
public:
// construction/destruction
z80sio_device(const machine_config &mconfig, device_type type, std::string name, std::string tag, device_t *owner, UINT32 clock, UINT32 variant, std::string shortname, std::string source);
z80sio_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
template<class _Object> static devcb_base &set_out_txda_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_txda_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_dtra_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_dtra_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_rtsa_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_rtsa_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_wrdya_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_wrdya_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_synca_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_synca_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_txdb_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_txdb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_dtrb_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_dtrb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_rtsb_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_rtsb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_wrdyb_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_wrdyb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_syncb_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_syncb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_int_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_int_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_rxdrqa_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_rxdrqa_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_txdrqa_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_txdrqa_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_rxdrqb_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_rxdrqb_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_txdrqb_callback(device_t &device, _Object object) { return downcast<z80sio_device &>(device).m_out_txdrqb_cb.set_callback(object); }
static void configure_channels(device_t &device, int rxa, int txa, int rxb, int txb)
{
z80sio_device &dev = downcast<z80sio_device &>(device);
dev.m_rxca = rxa;
dev.m_txca = txa;
dev.m_rxcb = rxb;
dev.m_txcb = txb;
}
DECLARE_READ8_MEMBER( cd_ba_r );
DECLARE_WRITE8_MEMBER( cd_ba_w );
DECLARE_READ8_MEMBER( ba_cd_r );
DECLARE_WRITE8_MEMBER( ba_cd_w );
DECLARE_READ8_MEMBER( da_r ) { return m_chanA->data_read(); }
DECLARE_WRITE8_MEMBER( da_w ) { m_chanA->data_write(data); }
DECLARE_READ8_MEMBER( db_r ) { return m_chanB->data_read(); }
DECLARE_WRITE8_MEMBER( db_w ) { m_chanB->data_write(data); }
DECLARE_READ8_MEMBER( ca_r ) { return m_chanA->control_read(); }
DECLARE_WRITE8_MEMBER( ca_w ) { m_chanA->control_write(data); }
DECLARE_READ8_MEMBER( cb_r ) { return m_chanB->control_read(); }
DECLARE_WRITE8_MEMBER( cb_w ) { m_chanB->control_write(data); }
// interrupt acknowledge
int m1_r();
DECLARE_WRITE_LINE_MEMBER( rxa_w ) { m_chanA->write_rx(state); }
DECLARE_WRITE_LINE_MEMBER( rxb_w ) { m_chanB->write_rx(state); }
DECLARE_WRITE_LINE_MEMBER( ctsa_w ) { m_chanA->cts_w(state); }
DECLARE_WRITE_LINE_MEMBER( ctsb_w ) { m_chanB->cts_w(state); }
DECLARE_WRITE_LINE_MEMBER( dcda_w ) { m_chanA->dcd_w(state); }
DECLARE_WRITE_LINE_MEMBER( dcdb_w ) { m_chanB->dcd_w(state); }
//DECLARE_WRITE_LINE_MEMBER( ria_w ) { m_chanA->ri_w(state); }
//DECLARE_WRITE_LINE_MEMBER( rib_w ) { m_chanB->ri_w(state); }
DECLARE_WRITE_LINE_MEMBER( rxca_w ) { m_chanA->rxc_w(state); }
DECLARE_WRITE_LINE_MEMBER( rxcb_w ) { m_chanB->rxc_w(state); }
DECLARE_WRITE_LINE_MEMBER( txca_w ) { m_chanA->txc_w(state); }
DECLARE_WRITE_LINE_MEMBER( txcb_w ) { m_chanB->txc_w(state); }
DECLARE_WRITE_LINE_MEMBER( rxtxcb_w ) { m_chanB->rxc_w(state); m_chanB->txc_w(state); }
DECLARE_WRITE_LINE_MEMBER( synca_w ) { m_chanA->sync_w(state); }
DECLARE_WRITE_LINE_MEMBER( syncb_w ) { m_chanB->sync_w(state); }
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual machine_config_constructor device_mconfig_additions() const override;
// device_z80daisy_interface overrides
virtual int z80daisy_irq_state() override;
virtual int z80daisy_irq_ack() override;
virtual void z80daisy_irq_reti() override;
// internal interrupt management
void check_interrupts();
void reset_interrupts();
void trigger_interrupt(int index, int state);
int get_channel_index(z80sio_channel *ch) { return (ch == m_chanA) ? 0 : 1; }
enum
{
TYPE_Z80SIO
};
enum
{
CHANNEL_A = 0,
CHANNEL_B
};
required_device<z80sio_channel> m_chanA;
required_device<z80sio_channel> m_chanB;
// internal state
int m_rxca;
int m_txca;
int m_rxcb;
int m_txcb;
devcb_write_line m_out_txda_cb;
devcb_write_line m_out_dtra_cb;
devcb_write_line m_out_rtsa_cb;
devcb_write_line m_out_wrdya_cb;
devcb_write_line m_out_synca_cb;
devcb_write_line m_out_txdb_cb;
devcb_write_line m_out_dtrb_cb;
devcb_write_line m_out_rtsb_cb;
devcb_write_line m_out_wrdyb_cb;
devcb_write_line m_out_syncb_cb;
devcb_write_line m_out_int_cb;
devcb_write_line m_out_rxdrqa_cb;
devcb_write_line m_out_txdrqa_cb;
devcb_write_line m_out_rxdrqb_cb;
devcb_write_line m_out_txdrqb_cb;
int m_int_state[8]; // interrupt state
int m_variant;
};
// device type definition
extern const device_type Z80SIO;
extern const device_type Z80SIO_CHANNEL;
#endif