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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/*
* nld_82S115.cpp
*
*/
#include "nld_82S115.h"
namespace netlist
{
namespace devices
{
NETLIB_OBJECT(82S115)
{
NETLIB_CONSTRUCTOR(82S115)
, m_A(*this, {{"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8"}})
, m_CE1(*this, "CE1")
, m_CE2Q(*this, "CE2Q")
, m_STROBE(*this, "STROBE")
, m_O(*this, {{"O1", "O2", "O3", "O4", "O5", "O6", "O7", "O8"}})
, m_last_O(*this, "m_last_O", 0)
, m_ROM(*this, "m_ROM", nullptr)
{
}
NETLIB_RESETI();
NETLIB_UPDATEI();
protected:
object_array_t<logic_input_t, 9> m_A;
logic_input_t m_CE1;
logic_input_t m_CE2Q;
logic_input_t m_STROBE;
object_array_t<logic_output_t, 8> m_O;
state_var<unsigned> m_last_O;
param_ptr_t m_ROM; // 4096 bits, 512x8
};
NETLIB_OBJECT_DERIVED(82S115_dip, 82S115)
{
NETLIB_CONSTRUCTOR_DERIVED(82S115_dip, 82S115)
{
register_subalias("21", m_A[0]);
register_subalias("22", m_A[1]);
register_subalias("23", m_A[2]);
register_subalias("1", m_A[3]);
register_subalias("2", m_A[4]);
register_subalias("3", m_A[5]);
register_subalias("4", m_A[6]);
register_subalias("5", m_A[7]);
register_subalias("6", m_A[8]);
register_subalias("20", m_CE1);
register_subalias("19", m_CE2Q);
// register_subalias("13", m_FE1);
// register_subalias("11", m_FE2);
register_subalias("18", m_STROBE);
register_subalias("7", m_O[0]);
register_subalias("8", m_O[1]);
register_subalias("9", m_O[2]);
register_subalias("10", m_O[3]);
register_subalias("14", m_O[4]);
register_subalias("15", m_O[5]);
register_subalias("16", m_O[6]);
register_subalias("17", m_O[7]);
}
};
NETLIB_RESET(82S115)
{
m_last_O = 0;
}
// FIXME: timing!
NETLIB_UPDATE(82S115)
{
unsigned o = 0;
if (m_CE1() && !m_CE2Q())
{
if (m_STROBE())
{
unsigned a = 0;
for (std::size_t i=0; i<9; i++)
a |= (m_A[i]() << i);
if (m_ROM() != nullptr)
o = ((std::uint_fast8_t*)(m_ROM()))[a];
}
else
{
o = m_last_O;
}
}
m_last_O = o;
// 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, NLTIME_FROM_NS(40)); // FIXME: Timing
}
NETLIB_DEVICE_IMPL(82S115)
NETLIB_DEVICE_IMPL(82S115_dip)
} //namespace devices
} // namespace netlist
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