// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Mostek MK3801 Serial Timer Interrupt Controller (Z80-STI) emulation ********************************************************************** _____ _____ 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_RXCLOCK(_clock) \ z80sti_device::set_rx_clock(*device, _clock); #define MCFG_Z80STI_TXCLOCK(_clock) \ z80sti_device::set_tx_clock(*device, _clock); #define MCFG_Z80STI_OUT_INT_CB(_devcb) \ devcb = &z80sti_device::set_out_int_callback(*device, DEVCB_##_devcb); #define MCFG_Z80STI_IN_GPIO_CB(_devcb) \ devcb = &z80sti_device::set_in_gpio_callback(*device, DEVCB_##_devcb); #define MCFG_Z80STI_OUT_GPIO_CB(_devcb) \ devcb = &z80sti_device::set_out_gpio_callback(*device, DEVCB_##_devcb); #define MCFG_Z80STI_OUT_SO_CB(_devcb) \ devcb = &z80sti_device::set_out_so_callback(*device, DEVCB_##_devcb); #define MCFG_Z80STI_OUT_TAO_CB(_devcb) \ devcb = &z80sti_device::set_out_tao_callback(*device, DEVCB_##_devcb); #define MCFG_Z80STI_OUT_TBO_CB(_devcb) \ devcb = &z80sti_device::set_out_tbo_callback(*device, DEVCB_##_devcb); #define MCFG_Z80STI_OUT_TCO_CB(_devcb) \ devcb = &z80sti_device::set_out_tco_callback(*device, DEVCB_##_devcb); #define MCFG_Z80STI_OUT_TDO_CB(_devcb) \ devcb = &z80sti_device::set_out_tdo_callback(*device, DEVCB_##_devcb); //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> z80sti_device class z80sti_device : public device_t, public device_serial_interface, public device_z80daisy_interface { public: // construction/destruction z80sti_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock); template static devcb_base &set_out_int_callback(device_t &device, _Object object) { return downcast(device).m_out_int_cb.set_callback(object); } template static devcb_base &set_in_gpio_callback(device_t &device, _Object object) { return downcast(device).m_in_gpio_cb.set_callback(object); } template static devcb_base &set_out_gpio_callback(device_t &device, _Object object) { return downcast(device).m_out_gpio_cb.set_callback(object); } template static devcb_base &set_out_so_callback(device_t &device, _Object object) { return downcast(device).m_out_so_cb.set_callback(object); } template static devcb_base &set_out_tao_callback(device_t &device, _Object object) { return downcast(device).m_out_tao_cb.set_callback(object); } template static devcb_base &set_out_tbo_callback(device_t &device, _Object object) { return downcast(device).m_out_tbo_cb.set_callback(object); } template static devcb_base &set_out_tco_callback(device_t &device, _Object object) { return downcast(device).m_out_tco_cb.set_callback(object); } template static devcb_base &set_out_tdo_callback(device_t &device, _Object object) { return downcast(device).m_out_tdo_cb.set_callback(object); } static void set_rx_clock(device_t &device, int clock) { downcast(device).m_rx_clock = clock; } static void set_tx_clock(device_t &device, int clock) { downcast(device).m_tx_clock = clock; } DECLARE_READ8_MEMBER( read ); DECLARE_WRITE8_MEMBER( write ); DECLARE_WRITE_LINE_MEMBER( i0_w ); DECLARE_WRITE_LINE_MEMBER( i1_w ); DECLARE_WRITE_LINE_MEMBER( i2_w ); DECLARE_WRITE_LINE_MEMBER( i3_w ); DECLARE_WRITE_LINE_MEMBER( i4_w ); DECLARE_WRITE_LINE_MEMBER( i5_w ); DECLARE_WRITE_LINE_MEMBER( i6_w ); DECLARE_WRITE_LINE_MEMBER( i7_w ); DECLARE_WRITE_LINE_MEMBER( tc_w ); DECLARE_WRITE_LINE_MEMBER( rc_w ); private: enum { TIMER_A = 0, TIMER_B, TIMER_C, TIMER_D }; enum { REGISTER_IR = 0, REGISTER_GPIP, REGISTER_IPRB, REGISTER_IPRA, REGISTER_ISRB, REGISTER_ISRA, REGISTER_IMRB, REGISTER_IMRA, REGISTER_PVR, REGISTER_TABC, REGISTER_TBDR, REGISTER_TADR, REGISTER_UCR, REGISTER_RSR, REGISTER_TSR, REGISTER_UDR }; enum { REGISTER_IR_SCR = 0, REGISTER_IR_TDDR, REGISTER_IR_TCDR, REGISTER_IR_AER, REGISTER_IR_IERB, REGISTER_IR_IERA, REGISTER_IR_DDR, REGISTER_IR_TCDC }; enum { IR_P0 = 0, IR_P1, IR_P2, IR_P3, IR_TD, IR_TC, IR_P4, IR_P5, IR_TB, IR_XE, IR_XB, IR_RE, IR_RB, IR_TA, IR_P6, IR_P7 }; static const int INT_LEVEL_GPIP[]; static const int INT_LEVEL_TIMER[]; static const UINT8 INT_VECTOR[]; static const int PRESCALER[]; // 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_complete() override; // device_z80daisy_interface overrides virtual int z80daisy_irq_state() override; virtual int z80daisy_irq_ack() override; virtual void z80daisy_irq_reti() override; // internal helpers void check_interrupts(); void take_interrupt(int level); void timer_count(int index); void gpip_input(int bit, int state); // device callbacks devcb_write_line m_out_int_cb; // this gets called on each change of the _INT pin (pin 17) devcb_read8 m_in_gpio_cb; // this is called on each read of the GPIO pins devcb_write8 m_out_gpio_cb; // this is called on each write of the GPIO pins devcb_write_line m_out_so_cb; // this gets called for each change of the SO pin (pin 37) devcb_write_line m_out_tao_cb; // this gets called for each change of the TAO pin (pin 1) devcb_write_line m_out_tbo_cb; // this gets called for each change of the TBO pin (pin 2) devcb_write_line m_out_tco_cb; // this gets called for each change of the TCO pin (pin 3) devcb_write_line m_out_tdo_cb; // this gets called for each change of the TDO pin (pin 4) int m_rx_clock; // serial receive clock int m_tx_clock; // serial transmit clock // 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 }; // device type definition extern const device_type Z80STI; #endif