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Diffstat (limited to 'src/lib/netlist/devices/nld_74393.cpp')
-rw-r--r--src/lib/netlist/devices/nld_74393.cpp88
1 files changed, 88 insertions, 0 deletions
diff --git a/src/lib/netlist/devices/nld_74393.cpp b/src/lib/netlist/devices/nld_74393.cpp
new file mode 100644
index 00000000000..4f8eac01634
--- /dev/null
+++ b/src/lib/netlist/devices/nld_74393.cpp
@@ -0,0 +1,88 @@
+// license:BSD-3-Clause
+// copyright-holders:Couriersud
+/*
+ * nld_74393.cpp
+ *
+ * DM74393: Dual 4-Stage Binary Counter
+ *
+ * +--------------+
+ * /CP |1 ++ 14| VCC
+ * MR |2 13| /CP
+ * Q0 |3 12| MR
+ * Q1 |4 74393 11| Q0
+ * Q2 |5 10| Q1
+ * Q3 |6 9| Q2
+ * GND |7 8| Q3
+ * +--------------+
+ *
+ * Naming conventions follow Motorola datasheet
+ *
+ */
+
+#include "nl_base.h"
+
+namespace netlist::devices {
+
+ static constexpr const unsigned MAXCNT = 15;
+
+ NETLIB_OBJECT(74393)
+ {
+ NETLIB_CONSTRUCTOR(74393)
+ , m_CP(*this, "CP", NETLIB_DELEGATE(cp))
+ , m_MR(*this, "MR", NETLIB_DELEGATE(mr))
+ , m_Q(*this, {"Q0", "Q1", "Q2", "Q3"})
+ , m_cnt(*this, "m_cnt", 0)
+ , m_cp(*this, "m_cp", 0)
+ , m_mr(*this, "m_mr", 0)
+ , m_power_pins(*this)
+ {
+ }
+
+ private:
+ NETLIB_RESETI()
+ {
+ m_CP.set_state(logic_t::STATE_INP_HL);
+ m_cnt = 0;
+ }
+
+ NETLIB_HANDLERI(mr)
+ {
+ if (!m_MR())
+ {
+ m_CP.activate_hl();
+ }
+ else
+ {
+ m_CP.inactivate();
+ if (m_cnt != 0)
+ {
+ m_cnt = 0;
+ m_Q.push(0, NLTIME_FROM_NS(24));
+ }
+ }
+ }
+
+ NETLIB_HANDLERI(cp)
+ {
+ auto cnt = (m_cnt + 1) & MAXCNT;
+ m_cnt = cnt;
+ m_Q[0].push((cnt >> 0) & 1, NLTIME_FROM_NS(13));
+ m_Q[1].push((cnt >> 1) & 1, NLTIME_FROM_NS(22));
+ m_Q[2].push((cnt >> 2) & 1, NLTIME_FROM_NS(31));
+ m_Q[3].push((cnt >> 3) & 1, NLTIME_FROM_NS(40));
+ }
+
+ logic_input_t m_CP;
+ logic_input_t m_MR;
+ object_array_t<logic_output_t, 4> m_Q;
+
+ state_var<unsigned> m_cnt;
+ state_var_sig m_cp;
+ state_var_sig m_mr;
+
+ nld_power_pins m_power_pins;
+ };
+
+ NETLIB_DEVICE_IMPL(74393, "TTL_74393", "+CP,+MR,@VCC,@GND")
+
+} // namespace netlist::devices