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author | 2015-09-13 08:41:44 +0200 | |
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committer | 2015-09-13 08:41:44 +0200 | |
commit | f88cefad27a1737c76e09d99c9fb43e173506081 (patch) | |
tree | 2d8167d03579c46e226471747eb4407bd00ed6fa /src/devices/machine/msm6242.h | |
parent | e92ac9e0fa8e99869894bea00589bbb526be30aa (diff) |
Move all devices into separate part of src tree (nw)
Diffstat (limited to 'src/devices/machine/msm6242.h')
-rw-r--r-- | src/devices/machine/msm6242.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/devices/machine/msm6242.h b/src/devices/machine/msm6242.h new file mode 100644 index 00000000000..4d44fd1b860 --- /dev/null +++ b/src/devices/machine/msm6242.h @@ -0,0 +1,83 @@ +// license:BSD-3-Clause +// copyright-holders:Nathan Woods +/*************************************************************************** + + MSM6242 Real Time Clock + +***************************************************************************/ + +#pragma once + +#ifndef __MSM6242DEV_H__ +#define __MSM6242DEV_H__ + +#include "emu.h" + + +#define MCFG_MSM6242_OUT_INT_HANDLER(_devcb) \ + devcb = &msm6242_device::set_out_int_handler(*device, DEVCB_##_devcb); + + +// ======================> msm6242_device + +class msm6242_device : public device_t, + public device_rtc_interface +{ +public: + // construction/destruction + msm6242_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + + template<class _Object> static devcb_base &set_out_int_handler(device_t &device, _Object object) { return downcast<msm6242_device &>(device).m_out_int_handler.set_callback(object); } + + // I/O operations + DECLARE_WRITE8_MEMBER( write ); + DECLARE_READ8_MEMBER( read ); + +protected: + // device-level overrides + virtual void device_start(); + virtual void device_reset(); + virtual void device_pre_save(); + virtual void device_post_load(); + virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); + + // rtc overrides + virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second); + +private: + static const int RTC_TICKS = ~0; + + static const UINT8 IRQ_64THSECOND = 0; + static const UINT8 IRQ_SECOND = 1; + static const UINT8 IRQ_MINUTE = 2; + static const UINT8 IRQ_HOUR = 3; + + // state + UINT8 m_reg[3]; + UINT8 m_irq_flag; + UINT8 m_irq_type; + UINT16 m_tick; + + // incidentals + devcb_write_line m_out_int_handler; + emu_timer * m_timer; + UINT64 m_last_update_time; // last update time, in clock cycles + + // methods + void rtc_timer_callback(); + UINT64 current_time(); + void irq(UINT8 irq_type); + UINT64 bump(int rtc_register, UINT64 delta, UINT64 register_min, UINT64 register_range); + void update_rtc_registers(); + void update_timer(); + UINT8 get_clock_nibble(int rtc_register, bool high); + static const char *irq_type_string(UINT8 irq_type); +}; + + +// device type definition +extern const device_type MSM6242; + + +#endif /* __MSM6242DEV_H__ */ |