// 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" //************************************************************************** // 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); auto data_callback() { return m_data_cb.bind(); } auto qh_callback() { return m_qh_cb.bind(); } void serial_w(int state); void clock_w(int state); void shift_load_w(int state); 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