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Diffstat (limited to 'src/lib/netlist/devices/nld_2716.cpp')
-rw-r--r--src/lib/netlist/devices/nld_2716.cpp98
1 files changed, 98 insertions, 0 deletions
diff --git a/src/lib/netlist/devices/nld_2716.cpp b/src/lib/netlist/devices/nld_2716.cpp
new file mode 100644
index 00000000000..7ba974b92da
--- /dev/null
+++ b/src/lib/netlist/devices/nld_2716.cpp
@@ -0,0 +1,98 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+/*
+ * nld_2716.cpp
+ *
+ */
+
+#include "nld_2716.h"
+
+namespace netlist
+{
+ namespace devices
+ {
+ NETLIB_OBJECT(2716)
+ {
+ NETLIB_CONSTRUCTOR(2716)
+ , m_A(*this, {{ "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "A10" }})
+ , m_GQ(*this, "GQ")
+ , m_EPQ(*this, "EPQ")
+ , m_D(*this, {{ "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7" }})
+ , m_last_EPQ(*this, "m_last_EPQ", 1)
+ , m_ROM(*this, "ROM")
+ {
+ }
+
+ NETLIB_UPDATEI();
+
+ protected:
+ object_array_t<logic_input_t, 11> m_A;
+ logic_input_t m_GQ;
+ logic_input_t m_EPQ;
+ object_array_t<logic_output_t, 8> m_D;
+
+ state_var<unsigned> m_last_EPQ;
+
+ param_rom_t<uint8_t, 11, 8> m_ROM; // 16 Kbits, used as 2 Kbit x 8
+ };
+
+ NETLIB_OBJECT_DERIVED(2716_dip, 2716)
+ {
+ NETLIB_CONSTRUCTOR_DERIVED(2716_dip, 2716)
+ {
+ register_subalias("8", m_A[0]);
+ register_subalias("7", m_A[1]);
+ register_subalias("6", m_A[2]);
+ register_subalias("5", m_A[3]);
+ register_subalias("4", m_A[4]);
+ register_subalias("3", m_A[5]);
+ register_subalias("2", m_A[6]);
+ register_subalias("1", m_A[7]);
+ register_subalias("23", m_A[8]);
+ register_subalias("22", m_A[9]);
+ register_subalias("19", m_A[10]);
+
+ register_subalias("20", m_GQ);
+ register_subalias("18", m_EPQ);
+
+ register_subalias("9", m_D[0]);
+ register_subalias("10", m_D[1]);
+ register_subalias("11", m_D[2]);
+ register_subalias("13", m_D[3]);
+ register_subalias("14", m_D[4]);
+ register_subalias("15", m_D[5]);
+ register_subalias("16", m_D[6]);
+ register_subalias("17", m_D[7]);
+ }
+ };
+
+ // FIXME: timing!
+ NETLIB_UPDATE(2716)
+ {
+ unsigned d = 0xff;
+
+ netlist_time delay = NLTIME_FROM_NS(450);
+ if (!m_GQ() && !m_EPQ())
+ {
+ unsigned a = 0;
+ for (std::size_t i=0; i<11; i++)
+ a |= (m_A[i]() << i);
+
+ d = m_ROM[a];
+
+ if (m_last_EPQ)
+ delay = NLTIME_FROM_NS(120);
+ }
+
+ m_last_EPQ = m_EPQ();
+
+ // FIXME: Outputs are tristate. This needs to be properly implemented
+ for (std::size_t i=0; i<8; i++)
+ m_D[i].push((d >> i) & 1, delay);
+ }
+
+ NETLIB_DEVICE_IMPL(2716)
+ NETLIB_DEVICE_IMPL(2716_dip)
+
+ } //namespace devices
+} // namespace netlist