mirror of
https://github.com/holub/mame
synced 2025-10-06 00:54:22 +03:00
6b96f7ba60
This fixes an over simplification. Logic devices implicitly assumed that GND/VDD actually is connected to GND(i.e. 0V). There is no immediate benefit from this change. It is a preparation for the future scalability. Now all power terminals (typically 7/14, 8/16) have to be explicitly connected to the supply rails. Also added a validation mode to the netlist core. This is not intended for running, but solely to better indentify pins which are not properly connected.
112 lines
2.0 KiB
C++
112 lines
2.0 KiB
C++
// license:GPL-2.0+
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// copyright-holders:Couriersud
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/*
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* nld_7450.c
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*
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*/
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#include "nld_7450.h"
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#include "netlist/nl_base.h"
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#include "nlid_system.h"
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namespace netlist
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{
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namespace devices
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{
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NETLIB_OBJECT(7450)
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{
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NETLIB_CONSTRUCTOR(7450)
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, m_A(*this, "A")
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, m_B(*this, "B")
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, m_C(*this, "C")
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, m_D(*this, "D")
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, m_Q(*this, "Q")
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, m_power_pins(*this)
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{
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}
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//NETLIB_RESETI();
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NETLIB_UPDATEI();
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public:
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logic_input_t m_A;
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logic_input_t m_B;
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logic_input_t m_C;
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logic_input_t m_D;
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logic_output_t m_Q;
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nld_power_pins m_power_pins;
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};
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NETLIB_OBJECT(7450_dip)
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{
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NETLIB_CONSTRUCTOR(7450_dip)
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, m_1(*this, "1")
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, m_2(*this, "2")
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{
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register_subalias("1", m_1.m_A);
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register_subalias("2", m_2.m_A);
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register_subalias("3", m_2.m_B);
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register_subalias("4", m_2.m_C);
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register_subalias("5", m_2.m_D);
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register_subalias("6", m_2.m_Q);
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register_subalias("7", "1.GND");
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register_subalias("8", m_1.m_Q);
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register_subalias("9", m_1.m_C);
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register_subalias("10", m_1.m_D);
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//register_subalias("11", m_1.m_X1);
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//register_subalias("12", m_1.m_X1Q);
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register_subalias("13", m_1.m_B);
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register_subalias("14", "1.VCC");
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connect("1.GND", "2.GND");
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connect("1.VCC", "2.VCC");
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}
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//NETLIB_RESETI();
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//NETLIB_UPDATEI();
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NETLIB_SUB(7450) m_1;
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NETLIB_SUB(7450) m_2;
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};
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NETLIB_UPDATE(7450)
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{
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m_A.activate();
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m_B.activate();
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m_C.activate();
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m_D.activate();
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auto t1 = m_A() & m_B();
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auto t2 = m_C() & m_D();
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const netlist_time times[2] = { NLTIME_FROM_NS(15), NLTIME_FROM_NS(22) };
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uint_fast8_t res = 0;
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if (t1 ^ 1)
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{
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if (t2 ^ 1)
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{
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res = 1;
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}
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else
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{
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m_A.inactivate();
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m_B.inactivate();
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}
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}
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else
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{
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if (t2 ^ 1)
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{
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m_C.inactivate();
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m_D.inactivate();
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}
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}
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m_Q.push(res, times[res]);// ? 22000 : 15000);
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}
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NETLIB_DEVICE_IMPL(7450, "TTL_7450_ANDORINVERT", "+A,+B,+C,+D,@VCC,@GND")
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NETLIB_DEVICE_IMPL(7450_dip, "TTL_7450_DIP", "")
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} //namespace devices
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} // namespace netlist
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