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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/*
* nld_82S123.cpp
*
*/
#include "nld_82S123.h"
namespace netlist
{
namespace devices
{
NETLIB_OBJECT(82S123)
{
NETLIB_CONSTRUCTOR(82S123)
, m_A(*this, {{"A0", "A1", "A2", "A3", "A4"}})
, m_CEQ(*this, "CEQ")
, m_O(*this, {{"O1", "O2", "O3", "O4", "O5", "O6", "O7", "O8"}})
, m_ROM(*this, "m_ROM", nullptr)
{
}
NETLIB_UPDATEI();
protected:
object_array_t<logic_input_t, 5> m_A;
logic_input_t m_CEQ;
object_array_t<logic_output_t, 8> m_O;
param_ptr_t m_ROM; // 256 bits, 32x8
};
NETLIB_OBJECT_DERIVED(82S123_dip, 82S123)
{
NETLIB_CONSTRUCTOR_DERIVED(82S123_dip, 82S123)
{
register_subalias("1", m_O[0]);
register_subalias("2", m_O[1]);
register_subalias("3", m_O[2]);
register_subalias("4", m_O[3]);
register_subalias("5", m_O[4]);
register_subalias("6", m_O[5]);
register_subalias("7", m_O[6]);
register_subalias("8", m_O[7]);
register_subalias("15", m_CEQ);
register_subalias("10", m_A[0]);
register_subalias("11", m_A[1]);
register_subalias("12", m_A[2]);
register_subalias("13", m_A[3]);
register_subalias("14", m_A[4]);
}
};
// FIXME: timing!
NETLIB_UPDATE(82S123)
{
unsigned o = 0xff;
netlist_time delay = NLTIME_FROM_NS(35);
if (!m_CEQ())
{
unsigned a = 0;
for (std::size_t i=0; i<5; i++)
a |= (m_A[i]() << i);
if (m_ROM() != nullptr)
o = ((std::uint_fast8_t*)(m_ROM()))[a];
delay = NLTIME_FROM_NS(50);
}
// FIXME: Outputs are tristate. This needs to be properly implemented
for (std::size_t i=0; i<8; i++)
m_O[i].push((o >> i) & 1, delay);
}
NETLIB_DEVICE_IMPL(82S123)
NETLIB_DEVICE_IMPL(82S123_dip)
} //namespace devices
} // namespace netlist
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