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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/*
* nld_2102A.cpp
*
*/
#include "nld_2102A.h"
#define ADDR2BYTE(a) ((a) >> 3)
#define ADDR2BIT(a) ((a) & 0x7)
namespace netlist
{
namespace devices
{
NETLIB_OBJECT(2102A)
{
NETLIB_CONSTRUCTOR(2102A)
, m_A(*this, {{"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9" }})
, m_CEQ(*this, "CEQ")
, m_RWQ(*this, "RWQ")
, m_DI(*this, "DI")
, m_DO(*this, "DO")
, m_ram(*this, "m_ram", 0)
, m_RAM(*this, "m_RAM", &m_ram[0])
{
}
NETLIB_RESETI();
NETLIB_UPDATEI();
protected:
object_array_t<logic_input_t, 10> m_A;
logic_input_t m_CEQ;
logic_input_t m_RWQ;
logic_input_t m_DI;
logic_output_t m_DO;
state_var<uint_fast8_t[128]> m_ram; // 1024x1 bits
param_ptr_t m_RAM;
};
NETLIB_OBJECT_DERIVED(2102A_dip, 2102A)
{
NETLIB_CONSTRUCTOR_DERIVED(2102A_dip, 2102A)
{
register_subalias("8", m_A[0]);
register_subalias("4", m_A[1]);
register_subalias("5", m_A[2]);
register_subalias("6", m_A[3]);
register_subalias("7", m_A[4]);
register_subalias("2", m_A[5]);
register_subalias("1", m_A[6]);
register_subalias("16", m_A[7]);
register_subalias("15", m_A[8]);
register_subalias("14", m_A[9]);
register_subalias("13", m_CEQ);
register_subalias("3", m_RWQ);
register_subalias("11", m_DI);
register_subalias("12", m_DO);
}
};
NETLIB_UPDATE(2102A)
{
netlist_time max_delay = NLTIME_FROM_NS(350);
if (!m_CEQ())
{
unsigned a = 0;
for (std::size_t i=0; i<10; i++)
{
a |= m_A[i]() << i;
}
const unsigned byte = ADDR2BYTE(a);
const unsigned bit = ADDR2BIT(a);
if (!m_RWQ())
{
m_ram[byte] &= ~(static_cast<uint_fast8_t>(1) << bit);
m_ram[byte] |= (static_cast<uint_fast8_t>(m_DI()) << bit);
}
m_DO.push((m_ram[byte] >> bit) & 1, max_delay);
}
}
NETLIB_RESET(2102A)
{
m_RAM.setTo(&m_ram[0]);
for (std::size_t i=0; i<128; i++)
m_ram[i] = 0;
}
NETLIB_DEVICE_IMPL(2102A)
NETLIB_DEVICE_IMPL(2102A_dip)
} //namespace devices
} // namespace netlist
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