// license: BSD-3-Clause // copyright-holders: Dirk Best, Luca Elia /*************************************************************************** SN54/74165 8-Bit Parallel-In/Serial-Out Shift Register ___ ___ SH//LD 1 |* u | 16 VCC CLK 2 | | 15 CLK INH E 3 | | 14 D F 4 | | 13 C G 5 | | 12 B H 6 | | 11 A /QH 7 | | 10 SER GND 8 |_______| 9 QH ***************************************************************************/ #ifndef MAME_DEVICES_MACHINE_74165_H #define MAME_DEVICES_MACHINE_74165_H #pragma once #include "machine/timer.h" //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_TTL165_DATA_CB(_devcb) \ devcb = &downcast(*device).set_data_callback(DEVCB_##_devcb); #define MCFG_TTL165_QH_CB(_devcb) \ devcb = &downcast(*device).set_qh_callback(DEVCB_##_devcb); //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class ttl165_device : public device_t { public: // construction/destruction ttl165_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); // configuration template devcb_base &set_data_callback(Object &&cb) { return m_data_cb.set_callback(std::forward(cb)); } template devcb_base &set_qh_callback(Object &&cb) { return m_qh_cb.set_callback(std::forward(cb)); } DECLARE_WRITE_LINE_MEMBER(serial_w); DECLARE_WRITE_LINE_MEMBER(clock_w); DECLARE_WRITE_LINE_MEMBER(shift_load_w); protected: // device-level overrides virtual void device_add_mconfig(machine_config &config) override; virtual void device_start() override; virtual void device_reset() override; private: required_device m_timer; // callbacks devcb_read8 m_data_cb; devcb_write_line m_qh_cb; // state uint8_t m_data; int m_ser; int m_clk; int m_shld; TIMER_DEVICE_CALLBACK_MEMBER(qh_output); void update_qh(); }; // device type definition DECLARE_DEVICE_TYPE(TTL165, ttl165_device) #endif // MAME_DEVICES_MACHINE_74165_H