// license:BSD-3-Clause // copyright-holders:Raphael Nabet, R. Belmont /* rtc65271.h: include file for rtc65271.c */ #ifndef __RTC65271_H__ #define __RTC65271_H__ //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_RTC65271_INTERRUPT_CB(_devcb) \ devcb = &rtc65271_device::set_interrupt_callback(*device, DEVCB_##_devcb); // ======================> rtc65271_device class rtc65271_device : public device_t, public device_nvram_interface { public: // construction/destruction rtc65271_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); protected: // device-level overrides virtual void device_start() override; // device_nvram_interface overrides virtual void nvram_default() override; virtual void nvram_read(emu_file &file) override; virtual void nvram_write(emu_file &file) override; public: template static devcb_base &set_interrupt_callback(device_t &device, _Object object) { return downcast(device).m_interrupt_cb.set_callback(object); } DECLARE_READ8_MEMBER( rtc_r ); DECLARE_READ8_MEMBER( xram_r ); DECLARE_WRITE8_MEMBER( rtc_w ); DECLARE_WRITE8_MEMBER( xram_w ); private: UINT8 read(int xramsel, offs_t offset); void write(int xramsel, offs_t offset, UINT8 data); void field_interrupts(); TIMER_CALLBACK_MEMBER(rtc_SQW_cb); TIMER_CALLBACK_MEMBER(rtc_begin_update_cb); TIMER_CALLBACK_MEMBER(rtc_end_update_cb); /* 64 8-bit registers (10 clock registers, 4 control/status registers, and 50 bytes of user RAM) */ UINT8 m_regs[64]; UINT8 m_cur_reg; /* extended RAM: 4kbytes of battery-backed RAM (in pages of 32 bytes) */ UINT8 m_xram[4096]; UINT8 m_cur_xram_page; /* update timer: called every second */ emu_timer *m_update_timer; /* SQW timer: called every periodic clock half-period */ emu_timer *m_SQW_timer; UINT8 m_SQW_internal_state; /* callback called when interrupt pin state changes (may be NULL) */ devcb_write_line m_interrupt_cb; }; // device type definition extern const device_type RTC65271; #endif