// license:BSD-3-Clause // copyright-holders:Ryan Holtz /* * nld_82S126.cpp * */ #include "nld_82S126.h" #include "netlist/nl_base.h" #include "nlid_system.h" namespace netlist { namespace devices { NETLIB_OBJECT(82S126) { NETLIB_CONSTRUCTOR(82S126) , m_A(*this, {{"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7" }}) , m_CE1Q(*this, "CE1Q") , m_CE2Q(*this, "CE2Q") , m_O(*this, {{"O1", "O2", "O3", "O4" }}) , m_ROM(*this, "ROM") , m_power_pins(*this) { } NETLIB_UPDATEI(); protected: object_array_t m_A; logic_input_t m_CE1Q; logic_input_t m_CE2Q; object_array_t m_O; param_rom_t m_ROM; // 1024 bits, 32x32, used as 256x4 nld_power_pins m_power_pins; }; NETLIB_OBJECT_DERIVED(82S126_dip, 82S126) { NETLIB_CONSTRUCTOR_DERIVED(82S126_dip, 82S126) { register_subalias("5", m_A[0]); register_subalias("6", m_A[1]); register_subalias("7", m_A[2]); register_subalias("4", m_A[3]); register_subalias("3", m_A[4]); register_subalias("2", m_A[5]); register_subalias("1", m_A[6]); register_subalias("15", m_A[7]); register_subalias("13", m_CE1Q); register_subalias("14", m_CE2Q); register_subalias("12", m_O[0]); register_subalias("11", m_O[1]); register_subalias("10", m_O[2]); register_subalias("9", m_O[3]); register_subalias("8", "GND"); register_subalias("16", "VCC"); } }; // FIXME: timing! NETLIB_UPDATE(82S126) { unsigned o = 0xf; netlist_time delay = NLTIME_FROM_NS(25); if (!m_CE1Q() && !m_CE2Q()) { unsigned a = 0; for (std::size_t i=0; i<8; i++) a |= (m_A[i]() << i); o = m_ROM[a]; delay = NLTIME_FROM_NS(50); } // FIXME: Outputs are tristate. This needs to be properly implemented for (std::size_t i=0; i<4; i++) m_O[i].push((o >> i) & 1, delay); } NETLIB_DEVICE_IMPL(82S126, "PROM_82S126", "+CE1Q,+CE2Q,+A0,+A1,+A2,+A3,+A4,+A5,+A6,+A7,@VCC,@GND") NETLIB_DEVICE_IMPL(82S126_dip, "PROM_82S126_DIP", "") } //namespace devices } // namespace netlist