diff options
Diffstat (limited to 'src/lib/netlist/devices/nld_7486.cpp')
-rw-r--r-- | src/lib/netlist/devices/nld_7486.cpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/lib/netlist/devices/nld_7486.cpp b/src/lib/netlist/devices/nld_7486.cpp new file mode 100644 index 00000000000..5957c2c0433 --- /dev/null +++ b/src/lib/netlist/devices/nld_7486.cpp @@ -0,0 +1,117 @@ +// license:GPL-2.0+ +// copyright-holders:Couriersud +/* + * nld_7486.c + * + */ + +#include "nld_7486.h" + +NETLIB_NAMESPACE_DEVICES_START() + +#if (USE_TRUTHTABLE) +nld_7486::truthtable_t nld_7486::m_ttbl; +const char *nld_7486::m_desc[] = { + "A , B | Q ", + "0,0|0|15", + "0,1|1|22", + "1,0|1|22", + "1,1|0|15", + "" +}; +#else +NETLIB_START(7486) +{ + register_input("A", m_I[0]); + register_input("B", m_I[1]); + register_output("Q", m_Q[0]); + + save(NLNAME(m_active)); +} + +NETLIB_RESET(7486) +{ + m_active = 1; +} + +NETLIB_UPDATE(7486) +{ + const netlist_time delay[2] = { NLTIME_FROM_NS(15), NLTIME_FROM_NS(22) }; + + UINT8 t = INPLOGIC(m_I[0]) ^ INPLOGIC(m_I[1]); + OUTLOGIC(m_Q[0], t, delay[t]); +} + +ATTR_HOT void NETLIB_NAME(7486)::inc_active() +{ + const netlist_time delay[2] = { NLTIME_FROM_NS(15), NLTIME_FROM_NS(22) }; + nl_assert(netlist().use_deactivate()); + if (++m_active == 1) + { + m_I[0].activate(); + m_I[1].activate(); + + netlist_time mt = this->m_I[0].net().time(); + if (this->m_I[1].net().time() > mt) + mt = this->m_I[1].net().time(); + + UINT8 t = INPLOGIC(m_I[0]) ^ INPLOGIC(m_I[1]); + m_Q[0].net().set_Q_time(t, mt + delay[t]); + } +} + +ATTR_HOT void NETLIB_NAME(7486)::dec_active() +{ +#if 1 + nl_assert(netlist().use_deactivate()); + if (--m_active == 0) + { + m_I[0].inactivate(); + m_I[1].inactivate(); + } +#endif +} +#endif + +NETLIB_START(7486_dip) +{ + register_sub("1", m_1); + register_sub("2", m_2); + register_sub("3", m_3); + register_sub("4", m_4); + + register_subalias("1", m_1.m_I[0]); + register_subalias("2", m_1.m_I[1]); + register_subalias("3", m_1.m_Q[0]); + + register_subalias("4", m_2.m_I[0]); + register_subalias("5", m_2.m_I[1]); + register_subalias("6", m_2.m_Q[0]); + + register_subalias("9", m_3.m_I[0]); + register_subalias("10", m_3.m_I[1]); + register_subalias("8", m_3.m_Q[0]); + + register_subalias("12", m_4.m_I[0]); + register_subalias("13", m_4.m_I[1]); + register_subalias("11", m_4.m_Q[0]); +} + +NETLIB_UPDATE(7486_dip) +{ + /* only called during startup */ + m_1.update_dev(); + m_2.update_dev(); + m_3.update_dev(); + m_4.update_dev(); +} + +NETLIB_RESET(7486_dip) +{ + m_1.do_reset(); + m_2.do_reset(); + m_3.do_reset(); + m_4.do_reset(); +} + +NETLIB_NAMESPACE_DEVICES_END() |