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// license:BSD-3-Clause
// copyright-holders:Felipe Sanches
/*
* nld_tms4800.cpp
*
*/
#include "nld_tms4800.h"
#include "netlist/nl_base.h"
namespace netlist
{
namespace devices
{
NETLIB_OBJECT(TMS4800)
{
NETLIB_CONSTRUCTOR(TMS4800)
, m_A(*this, {{ "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "A10" }})
, m_AR(*this, "AR")
, m_OE1(*this, "OE1")
, m_OE2(*this, "OE2")
, m_D(*this, {{ "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7" }})
, m_last_data(*this, "m_last_data", 1)
, m_ROM(*this, "ROM")
{
}
NETLIB_UPDATEI();
protected:
object_array_t<logic_input_t, 11> m_A;
logic_input_t m_AR;
logic_input_t m_OE1;
logic_input_t m_OE2;
object_array_t<logic_output_t, 8> m_D;
state_var<unsigned> m_last_data;
param_rom_t<uint8_t, 11, 8> m_ROM; // 16 Kbits, used as 2 Kbit x 8
};
NETLIB_OBJECT_DERIVED(TMS4800_dip, TMS4800)
{
NETLIB_CONSTRUCTOR_DERIVED(TMS4800_dip, TMS4800)
{
register_subalias("2", m_A[0]);
register_subalias("3", m_A[1]);
register_subalias("4", m_A[2]);
register_subalias("5", m_A[3]);
register_subalias("6", m_A[4]);
register_subalias("7", m_A[5]);
register_subalias("12", m_A[6]);
register_subalias("11", m_A[7]);
register_subalias("10", m_A[8]);
register_subalias("8", m_A[9]);
register_subalias("15", m_A[10]);
register_subalias("13", m_AR);
register_subalias("24", m_OE1);
register_subalias("14", m_OE2);
register_subalias("23", m_D[0]);
register_subalias("22", m_D[1]);
register_subalias("21", m_D[2]);
register_subalias("20", m_D[3]);
register_subalias("19", m_D[4]);
register_subalias("18", m_D[5]);
register_subalias("17", m_D[6]);
register_subalias("16", m_D[7]);
}
};
// FIXME: timing!
// FIXME: CS: The code looks odd, looks like m_last_data should be pushed out.
NETLIB_UPDATE(TMS4800)
{
netlist_time delay = NLTIME_FROM_NS(450);
if (m_AR())
{
unsigned a = 0;
for (std::size_t i=0; i<11; i++)
a |= (m_A[i]() << i);
m_last_data = m_ROM[a];
}
else
{
unsigned d = 0x00;
for (std::size_t i=0; i<4; i++)
{
if (m_OE1())
m_D[i].push((d >> i) & 1, delay);
if (m_OE2())
m_D[i+4].push((d >> (i+4)) & 1, delay);
}
}
}
NETLIB_DEVICE_IMPL(TMS4800, "ROM_TMS4800", "+AR,+OE1,+OE2,+A0,+A1,+A2,+A3,+A4,+A5,+A6,+A7,+A8,+A9,+A10")
NETLIB_DEVICE_IMPL(TMS4800_dip, "ROM_TMS4800_DIP", "")
} //namespace devices
} // namespace netlist
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