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// license:GPL-2.0+
// copyright-holders:Couriersud
/*
* nld_7492.cpp
*
*/
#include "nld_7492.h"
#include "netlist/nl_base.h"
#include "nlid_system.h"
namespace netlist
{
namespace devices
{
static C14CONSTEXPR const std::array<netlist_time, 4> delay =
{
NLTIME_FROM_NS(18),
NLTIME_FROM_NS(36) - NLTIME_FROM_NS(18),
NLTIME_FROM_NS(54) - NLTIME_FROM_NS(18),
NLTIME_FROM_NS(72) - NLTIME_FROM_NS(18)
};
NETLIB_OBJECT(7492)
{
NETLIB_CONSTRUCTOR(7492)
, m_A(*this, "A")
, m_B(*this, "B")
, m_R1(*this, "R1")
, m_R2(*this, "R2")
, m_cnt(*this, "m_cnt", 0)
, m_last_A(*this, "m_last_A", 0)
, m_last_B(*this, "m_last_B", 0)
, m_Q(*this, {"QA", "QB", "QC", "QD"})
, m_power_pins(*this)
{
}
private:
NETLIB_UPDATEI();
NETLIB_RESETI();
void update_outputs() noexcept
{
for (std::size_t i=0; i<4; i++)
m_Q[i].push((m_cnt >> i) & 1, delay[i]);
}
logic_input_t m_A;
logic_input_t m_B;
logic_input_t m_R1;
logic_input_t m_R2;
state_var_u8 m_cnt;
state_var<netlist_sig_t> m_last_A;
state_var<netlist_sig_t> m_last_B;
object_array_t<logic_output_t, 4> m_Q;
nld_power_pins m_power_pins;
};
NETLIB_OBJECT_DERIVED(7492_dip, 7492)
{
NETLIB_CONSTRUCTOR_DERIVED(7492_dip, 7492)
{
register_subalias("1", "B");
// register_subalias("2", ); --> NC
// register_subalias("3", ); --> NC
// register_subalias("4", ); --> NC
register_subalias("5", "VCC");
register_subalias("6", "R1");
register_subalias("7", "R2");
register_subalias("8", "QC");
register_subalias("9", "QB");
register_subalias("10", "GND");
register_subalias("11", "QD");
register_subalias("12", "QA");
// register_subalias("13", ); --> NC
register_subalias("14", "A");
}
};
NETLIB_RESET(7492)
{
m_cnt = 0;
m_last_A = 0;
m_last_B = 0;
}
NETLIB_UPDATE(7492)
{
const netlist_sig_t new_A = m_A();
const netlist_sig_t new_B = m_B();
if (m_R1() & m_R2())
{
m_cnt = 0;
update_outputs();
}
else
{
if (m_last_A && !new_A) // High - Low
{
m_cnt ^= 1;
m_Q[0].push(m_cnt & 1, delay[0]);
}
if (m_last_B && !new_B) // High - Low
{
m_cnt += 2;
if (m_cnt == 6)
m_cnt = 8;
if (m_cnt == 14)
m_cnt = 0;
update_outputs();
}
}
m_last_A = new_A;
m_last_B = new_B;
}
NETLIB_DEVICE_IMPL(7492, "TTL_7492", "+A,+B,+R1,+R2,@VCC,@GND")
NETLIB_DEVICE_IMPL(7492_dip, "TTL_7492_DIP", "")
} // namespace devices
} // namespace netlist
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