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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/*
* nld_tristate.cpp
*
* tristate: Hack to merge two tri-stated outputs together
*
*/
#include "nld_tristate.h"
#include "nl_base.h"
// FIXME: netlist now supports proper tristate outputs. All of this is legacy
// now and needs to be removed at some time.
namespace netlist
{
namespace devices
{
NETLIB_OBJECT(tristate)
{
NETLIB_CONSTRUCTOR(tristate)
, m_CEQ(*this, { "CEQ1", "CEQ2" }, NETLIB_DELEGATE(inputs))
, m_D(*this, { "D1", "D2" }, NETLIB_DELEGATE(inputs))
, m_Q(*this, "Q")
{
}
protected:
object_array_t<logic_input_t, 2> m_CEQ;
object_array_t<logic_input_t, 2> m_D;
logic_output_t m_Q;
private:
NETLIB_HANDLERI(inputs)
{
unsigned q = 0;
if (!m_CEQ[0]())
q |= m_D[0]();
if (!m_CEQ[1]())
q |= m_D[1]();
m_Q.push(q, NLTIME_FROM_NS(1));
}
};
NETLIB_OBJECT(tristate3)
{
NETLIB_CONSTRUCTOR(tristate3)
, m_CEQ(*this, { "CEQ1", "CEQ2", "CEQ3" }, NETLIB_DELEGATE(inputs) )
, m_D(*this, { "D1", "D2", "D3" }, NETLIB_DELEGATE(inputs) )
, m_Q(*this, "Q")
{
}
protected:
object_array_t<logic_input_t, 3> m_CEQ;
object_array_t<logic_input_t, 3> m_D;
logic_output_t m_Q;
private:
NETLIB_HANDLERI(inputs)
{
unsigned q = 0;
if (!m_CEQ[0]())
q |= m_D[0]();
if (!m_CEQ[1]())
q |= m_D[1]();
if (!m_CEQ[2]())
q |= m_D[2]();
m_Q.push(q, NLTIME_FROM_NS(1));
}
};
NETLIB_DEVICE_IMPL(tristate, "TTL_TRISTATE", "+CEQ1,+D1,+CEQ2,+D2")
NETLIB_DEVICE_IMPL(tristate3, "TTL_TRISTATE3", "")
} //namespace devices
} // namespace netlist
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