// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic /*************************************************************************** Generic 8bit and 16 bit latch devices ***************************************************************************/ #ifndef MAME_MACHINE_GEN_LATCH_H #define MAME_MACHINE_GEN_LATCH_H #pragma once //************************************************************************** // DEVICE TYPE DECLARATIONS //************************************************************************** DECLARE_DEVICE_TYPE(GENERIC_LATCH_8, generic_latch_8_device) DECLARE_DEVICE_TYPE(GENERIC_LATCH_16, generic_latch_16_device) //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_GENERIC_LATCH_8_ADD(_tag) \ MCFG_DEVICE_ADD(_tag, GENERIC_LATCH_8, 0) #define MCFG_GENERIC_LATCH_16_ADD(_tag) \ MCFG_DEVICE_ADD(_tag, GENERIC_LATCH_16, 0) #define MCFG_GENERIC_LATCH_DATA_PENDING_CB(_devcb) \ devcb = &downcast(*device).set_data_pending_callback(DEVCB_##_devcb); #define MCFG_GENERIC_LATCH_SEPARATE_ACKNOWLEDGE(_ack) \ downcast(*device).set_separate_acknowledge(_ack); //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> generic_latch_base_device class generic_latch_base_device : public device_t { public: // configuration template devcb_base &set_data_pending_callback(Object &&cb) { return m_data_pending_cb.set_callback(std::forward(cb)); } void set_separate_acknowledge(bool ack) { m_separate_acknowledge = ack; } DECLARE_READ_LINE_MEMBER(pending_r); DECLARE_READ8_MEMBER( acknowledge_r ); DECLARE_WRITE8_MEMBER( acknowledge_w ); protected: // construction/destruction generic_latch_base_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock); virtual void device_start() override; virtual void device_reset() override; bool has_separate_acknowledge() const { return m_separate_acknowledge; } bool is_latch_written() const { return m_latch_written; } void set_latch_written(bool latch_written); private: void init_callback(void *ptr, s32 param); bool m_separate_acknowledge; bool m_latch_written; devcb_write_line m_data_pending_cb; }; // ======================> generic_latch_8_device class generic_latch_8_device : public generic_latch_base_device { public: // construction/destruction generic_latch_8_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0); DECLARE_READ8_MEMBER( read ); DECLARE_WRITE8_MEMBER( write ); DECLARE_WRITE8_MEMBER( preset_w ); DECLARE_WRITE8_MEMBER( clear_w ); DECLARE_WRITE_LINE_MEMBER( preset ); DECLARE_WRITE_LINE_MEMBER( clear ); void preset_w(u8 value) { m_latched_value = value; } protected: virtual void device_start() override; void sync_callback(void *ptr, s32 param); private: u8 m_latched_value; }; // ======================> generic_latch_16_device class generic_latch_16_device : public generic_latch_base_device { public: // construction/destruction generic_latch_16_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0); DECLARE_READ16_MEMBER( read ); DECLARE_WRITE16_MEMBER( write ); DECLARE_WRITE16_MEMBER( preset_w ); DECLARE_WRITE16_MEMBER( clear_w ); DECLARE_WRITE_LINE_MEMBER( preset ); DECLARE_WRITE_LINE_MEMBER( clear ); void preset_w(u16 value) { m_latched_value = value; } protected: virtual void device_start() override; void sync_callback(void *ptr, s32 param); private: u16 m_latched_value; }; #endif // MAME_MACHINE_GEN_LATCH_H