// license: BSD-3-Clause // copyright-holders: Dirk Best /*************************************************************************** SN54/74153 Dual 4-Input Multiplexer ___ ___ EA/1G 1 |* u | 16 VCC S1/B 2 | | 15 EB/2G I3A/1C3 3 | | 14 S0/A I2A/1C2 4 | | 13 I3B/2C3 I1A/1C1 5 | | 12 I2B/2C2 I0A/1C0 6 | | 11 I1B/2C1 ZA/1Y 7 | | 10 I0B/2C0 GND 8 |_______| 9 ZB/2Y ***************************************************************************/ #ifndef MAME_DEVICES_MACHINE_74153_H #define MAME_DEVICES_MACHINE_74153_H #pragma once //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class ttl153_device : public device_t { public: // construction/destruction ttl153_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); // configuration auto za_cb() { return m_za_cb.bind(); } auto zb_cb() { return m_zb_cb.bind(); } // select DECLARE_WRITE_LINE_MEMBER(s0_w); DECLARE_WRITE_LINE_MEMBER(s1_w); DECLARE_WRITE8_MEMBER(s_w); // input a DECLARE_WRITE_LINE_MEMBER(i0a_w); DECLARE_WRITE_LINE_MEMBER(i1a_w); DECLARE_WRITE_LINE_MEMBER(i2a_w); DECLARE_WRITE_LINE_MEMBER(i3a_w); DECLARE_WRITE8_MEMBER(ia_w); // input b DECLARE_WRITE_LINE_MEMBER(i0b_w); DECLARE_WRITE_LINE_MEMBER(i1b_w); DECLARE_WRITE_LINE_MEMBER(i2b_w); DECLARE_WRITE_LINE_MEMBER(i3b_w); DECLARE_WRITE8_MEMBER(ib_w); // output DECLARE_READ_LINE_MEMBER(za_r); DECLARE_READ_LINE_MEMBER(zb_r); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; private: void update_a(); void update_b(); // callbacks devcb_write_line m_za_cb; devcb_write_line m_zb_cb; // state bool m_s[2]; bool m_ia[4]; bool m_ib[4]; bool m_z[2]; }; // device type definition DECLARE_DEVICE_TYPE(TTL153, ttl153_device) #endif // MAME_DEVICES_MACHINE_74153_H