// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** RIOT 6532 emulation ***************************************************************************/ #pragma once #ifndef __RIOT6532_H__ #define __RIOT6532_H__ /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ // ======================> riot6532_device class riot6532_device : public device_t { public: // construction/destruction riot6532_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); auto in_pa_callback() { return m_in_pa_cb.bind(); } auto out_pa_callback() { return m_out_pa_cb.bind(); } auto in_pb_callback() { return m_in_pb_cb.bind(); } auto out_pb_callback() { return m_out_pb_cb.bind(); } auto irq_callback() { return m_irq_cb.bind(); } DECLARE_READ8_MEMBER( read ); DECLARE_WRITE8_MEMBER( write ); uint8_t reg_r(uint8_t offset, bool debugger_access = false); void reg_w(uint8_t offset, uint8_t data); void porta_in_set(uint8_t data, uint8_t mask); void portb_in_set(uint8_t data, uint8_t mask); DECLARE_WRITE_LINE_MEMBER(pa0_w); DECLARE_WRITE_LINE_MEMBER(pa1_w); DECLARE_WRITE_LINE_MEMBER(pa2_w); DECLARE_WRITE_LINE_MEMBER(pa3_w); DECLARE_WRITE_LINE_MEMBER(pa4_w); DECLARE_WRITE_LINE_MEMBER(pa5_w); DECLARE_WRITE_LINE_MEMBER(pa6_w); DECLARE_WRITE_LINE_MEMBER(pa7_w); DECLARE_WRITE_LINE_MEMBER(pb0_w); DECLARE_WRITE_LINE_MEMBER(pb1_w); DECLARE_WRITE_LINE_MEMBER(pb2_w); DECLARE_WRITE_LINE_MEMBER(pb3_w); DECLARE_WRITE_LINE_MEMBER(pb4_w); DECLARE_WRITE_LINE_MEMBER(pb5_w); DECLARE_WRITE_LINE_MEMBER(pb6_w); DECLARE_WRITE_LINE_MEMBER(pb7_w); uint8_t porta_in_get(); uint8_t portb_in_get(); uint8_t porta_out_get(); uint8_t portb_out_get(); void timer_end(); protected: class riot6532_port { public: uint8_t m_in; uint8_t m_out; uint8_t m_ddr; devcb_read8 *m_in_cb; devcb_write8 *m_out_cb; }; // 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; virtual void device_post_load() override { } virtual void device_clock_changed() override { } private: void update_irqstate(); uint8_t apply_ddr(const riot6532_port *port); void update_pa7_state(); uint8_t get_timer(); riot6532_port m_port[2]; devcb_read8 m_in_pa_cb; devcb_write8 m_out_pa_cb; devcb_read8 m_in_pb_cb; devcb_write8 m_out_pb_cb; devcb_write_line m_irq_cb; uint8_t m_irqstate; uint8_t m_irqenable; int m_irq; uint8_t m_pa7dir; /* 0x80 = high-to-low, 0x00 = low-to-high */ uint8_t m_pa7prev; uint8_t m_timershift; uint8_t m_timerstate; emu_timer * m_timer; enum { TIMER_END_CB }; }; // device type definition DECLARE_DEVICE_TYPE(RIOT6532, riot6532_device) #endif