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Diffstat (limited to 'trunk/src/emu/machine/msm58321.h')
-rw-r--r-- | trunk/src/emu/machine/msm58321.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/msm58321.h b/trunk/src/emu/machine/msm58321.h new file mode 100644 index 00000000000..a2e55f00ea7 --- /dev/null +++ b/trunk/src/emu/machine/msm58321.h @@ -0,0 +1,121 @@ +/********************************************************************** + + OKI MSM58321RS Real Time Clock/Calendar emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +********************************************************************** + _____ _____ + CS2 1 |* \_/ | 16 Vdd + WRITE 2 | | 15 XT + READ 3 | | 14 _XT + D0 4 | MSM58321 | 13 CS1 + D1 5 | RTC58321 | 12 TEST + D2 6 | | 11 STOP + D3 7 | | 10 _BUSY + GND 8 |_____________| 9 ADDRESS WRITE + +**********************************************************************/ + +#pragma once + +#ifndef __MSM58321__ +#define __MSM58321__ + +#include "emu.h" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_MSM58321_ADD(_tag, _clock, _config) \ + MCFG_DEVICE_ADD(_tag, MSM58321, _clock) \ + MCFG_DEVICE_CONFIG(_config) + +#define MSM58321_INTERFACE(name) \ + const msm58321_interface (name) = + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> msm58321_interface + +struct msm58321_interface +{ + devcb_write_line m_out_busy_cb; +}; + + + +// ======================> msm58321_device + +class msm58321_device : public device_t, + public device_rtc_interface, + public msm58321_interface +{ +public: + // construction/destruction + msm58321_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + DECLARE_READ8_MEMBER( read ); + DECLARE_WRITE8_MEMBER( write ); + + DECLARE_WRITE_LINE_MEMBER( cs1_w ); + DECLARE_WRITE_LINE_MEMBER( cs2_w ); + DECLARE_WRITE_LINE_MEMBER( read_w ); + DECLARE_WRITE_LINE_MEMBER( write_w ); + DECLARE_WRITE_LINE_MEMBER( address_write_w ); + DECLARE_WRITE_LINE_MEMBER( stop_w ); + DECLARE_WRITE_LINE_MEMBER( test_w ); + DECLARE_READ_LINE_MEMBER( busy_r ); + +protected: + // device-level overrides + virtual void device_config_complete(); + virtual void device_start(); + virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); + + // device_rtc_interface overrides + virtual void rtc_set_time(int year, int month, int day, int day_of_week, int hour, int minute, int second); + virtual bool rtc_is_year_2000_compliant() { return false; } + +private: + static const device_timer_id TIMER_CLOCK = 0; + static const device_timer_id TIMER_BUSY = 1; + + inline int read_counter(int counter); + inline void write_counter(int counter, int value); + inline void advance_seconds(); + inline void advance_minutes(); + + devcb_resolved_write_line m_out_busy_func; + + int m_cs1; // chip select 1 + int m_cs2; // chip select 2 + int m_busy; // busy flag + int m_read; // read data + int m_write; // write data + int m_address_write; // write address + + UINT8 m_reg[13]; // registers + UINT8 m_latch; // data latch (not present in real chip) + UINT8 m_address; // address latch + + // timers + emu_timer *m_clock_timer; + emu_timer *m_busy_timer; +}; + + +// device type definition +extern const device_type MSM58321; + + + +#endif |