diff options
Diffstat (limited to 'src/lib/netlist/devices/nld_7475.cpp')
-rw-r--r-- | src/lib/netlist/devices/nld_7475.cpp | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/lib/netlist/devices/nld_7475.cpp b/src/lib/netlist/devices/nld_7475.cpp new file mode 100644 index 00000000000..3c26c1ce439 --- /dev/null +++ b/src/lib/netlist/devices/nld_7475.cpp @@ -0,0 +1,156 @@ +// license:BSD-3-Clause +// copyright-holders:Ryan Holtz +/* + * nld_7475.cpp + * + * TODO: Correct timing for clock-induced state changes, rather than assuming timing is always due to data-induced state changes + */ + +#include "nld_7475.h" + +namespace netlist +{ + namespace devices + { + NETLIB_OBJECT(7477) + { + NETLIB_CONSTRUCTOR(7477) + , m_C1C2(*this, "C1C2") + , m_C3C4(*this, "C3C4") + , m_last_Q(*this, "m_last_Q", 0) + , m_D(*this, {{"D1", "D2", "D3", "D4"}}) + , m_Q(*this, {{"Q1", "Q2", "Q3", "Q4"}}) + { + register_subalias("Q1", m_Q[0]); + } + + NETLIB_RESETI(); + NETLIB_UPDATEI(); + + void update_outputs(std::size_t start, std::size_t end); + + public: + logic_input_t m_C1C2; + logic_input_t m_C3C4; + state_var<unsigned> m_last_Q; + object_array_t<logic_input_t, 4> m_D; + object_array_t<logic_output_t, 4> m_Q; + }; + + NETLIB_OBJECT_DERIVED(7475, 7477) + { + NETLIB_CONSTRUCTOR_DERIVED(7475, 7477) + , m_QQ(*this, {{"QQ1", "QQ2", "QQ3", "QQ4"}}) + { + } + + NETLIB_UPDATEI(); + + public: + object_array_t<logic_output_t, 4> m_QQ; + }; + + NETLIB_OBJECT_DERIVED(7475_dip, 7475) + { + NETLIB_CONSTRUCTOR_DERIVED(7475_dip, 7475) + { + register_subalias("1", m_QQ[0]); + register_subalias("2", m_D[0]); + register_subalias("3", m_D[1]); + register_subalias("4", m_C3C4); + //register_subalias("5", ); ==> VCC + register_subalias("6", m_D[2]); + register_subalias("7", m_D[3]); + register_subalias("8", m_QQ[3]); + + register_subalias("9", m_Q[3]); + register_subalias("10", m_Q[2]); + register_subalias("11", m_QQ[2]); + //register_subalias("12", ); ==> GND + register_subalias("13", m_C1C2); + register_subalias("14", m_QQ[1]); + register_subalias("15", m_Q[1]); + register_subalias("16", m_Q[0]); + } + }; + + NETLIB_OBJECT_DERIVED(7477_dip, 7477) + { + NETLIB_CONSTRUCTOR_DERIVED(7477_dip, 7477) + { + register_subalias("1", m_D[0]); + register_subalias("2", m_D[1]); + register_subalias("3", m_C3C4); + //register_subalias("4", ); ==> VCC + register_subalias("5", m_D[2]); + register_subalias("6", m_D[3]); + //register_subalias("7", ); ==> NC + + register_subalias("8", m_Q[3]); + register_subalias("9", m_Q[2]); + //register_subalias("10", ); ==> NC + //register_subalias("11", ); ==> GND + register_subalias("12", m_C1C2); + register_subalias("13", m_Q[1]); + register_subalias("14", m_Q[0]); + } + }; + + NETLIB_UPDATE(7475) + { + unsigned start_q = m_last_Q; + + NETLIB_PARENT_UPDATE(7477); + + for (std::size_t i=0; i<4; i++) + { + unsigned last_bit = (m_last_Q >> i) & 1; + unsigned start_bit = (start_q >> i) & 1; + if (last_bit != start_bit) + m_QQ[i].push(last_bit ^ 1, last_bit != 0 ? NLTIME_FROM_NS(15) : NLTIME_FROM_NS(40)); + } + } + + void NETLIB_NAME(7477)::update_outputs(std::size_t start, std::size_t end) + { + for (std::size_t i=start; i<end; i++) + { + netlist_sig_t d = m_D[i](); + if (d != ((m_last_Q >> i) & 1)) + m_Q[i].push(d, d != 0 ? NLTIME_FROM_NS(30) : NLTIME_FROM_NS(25)); + m_last_Q &= ~(1 << i); + m_last_Q |= d << i; + } + } + + NETLIB_RESET(7477) + { + m_last_Q = 0; + } + + NETLIB_UPDATE(7477) + { + netlist_sig_t c1c2 = m_C1C2(); + netlist_sig_t c3c4 = m_C3C4(); + if (c1c2 && c3c4) + { + update_outputs(0, 4); + } + else if (c1c2) + { + update_outputs(0, 2); + } + else if (c3c4) + { + update_outputs(2, 4); + } + + } + + NETLIB_DEVICE_IMPL(7475) + NETLIB_DEVICE_IMPL(7475_dip) + NETLIB_DEVICE_IMPL(7477) + NETLIB_DEVICE_IMPL(7477_dip) + + } //namespace devices +} // namespace netlist |