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Diffstat (limited to 'src/lib/netlist/devices/nld_tms4800.cpp')
-rw-r--r--src/lib/netlist/devices/nld_tms4800.cpp133
1 files changed, 59 insertions, 74 deletions
diff --git a/src/lib/netlist/devices/nld_tms4800.cpp b/src/lib/netlist/devices/nld_tms4800.cpp
index 24729b10e72..55b14921b2d 100644
--- a/src/lib/netlist/devices/nld_tms4800.cpp
+++ b/src/lib/netlist/devices/nld_tms4800.cpp
@@ -3,31 +3,74 @@
/*
* nld_tms4800.cpp
*
+ * TMS-4800: 16 Kbit (2Kb x 8) READ ONLY MEMORY
+ *
+ * +----------------+
+ * VSS |1 ++ 24| OE1
+ * A1 |2 23| O1
+ * A2 |3 22| O2
+ * A3 |4 TMS-4800 21| O3
+ * A4 |5 20| O4
+ * A5 |6 19| O5
+ * A6 |7 18| O6
+ * A10 |8 17| O7
+ * VGG |9 16| O8
+ * A9 |10 15| A11
+ * A8 |11 14| OE2
+ * A7 |12 13| AR
+ * +----------------+
+ *
+ *
+ * Naming conventions follow Texas Instruments datasheet:
+ * http://bitsavers.trailing-edge.com/components/ti/_dataBooks/1975_TI_The_Semiconductor_Memory_Data_Book.pdf
*/
-#include "nld_tms4800.h"
-#include "netlist/nl_base.h"
+#include "nl_base.h"
+
+namespace netlist::devices {
-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_A(*this, { "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "A10" }, NETLIB_DELEGATE(inputs))
+ , m_AR(*this, "AR", NETLIB_DELEGATE(inputs))
+ , m_OE1(*this, "OE1", NETLIB_DELEGATE(inputs))
+ , m_OE2(*this, "OE2", NETLIB_DELEGATE(inputs))
+ , m_D(*this, { "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7" })
, m_last_data(*this, "m_last_data", 1)
, m_ROM(*this, "ROM")
+ , m_supply(*this)
{
}
- NETLIB_UPDATEI();
+ private:
+ // FIXME: timing!
+ // FIXME: CS: The code looks odd, looks like m_last_data should be pushed out.
+ NETLIB_HANDLERI(inputs)
+ {
+ 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);
+ }
+ }
+ }
- protected:
object_array_t<logic_input_t, 11> m_A;
logic_input_t m_AR;
logic_input_t m_OE1;
@@ -37,68 +80,10 @@ namespace netlist
state_var<unsigned> m_last_data;
param_rom_t<uint8_t, 11, 8> m_ROM; // 16 Kbits, used as 2 Kbit x 8
+ NETLIB_NAME(power_pins) m_supply;
};
- 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!
- NETLIB_UPDATE(TMS4800)
- {
- unsigned d = 0x00;
-
- 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
- {
- 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", "")
+ NETLIB_DEVICE_IMPL(TMS4800, "ROM_TMS4800", "+AR,+OE1,+OE2,+A0,+A1,+A2,+A3,+A4,+A5,+A6,+A7,+A8,+A9,+A10,@VCC,@GND")
- } //namespace devices
-} // namespace netlist
+} // namespace netlist::devices