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Diffstat (limited to 'src/devices/cpu/ns32000/ns32000.cpp')
-rw-r--r--src/devices/cpu/ns32000/ns32000.cpp160
1 files changed, 160 insertions, 0 deletions
diff --git a/src/devices/cpu/ns32000/ns32000.cpp b/src/devices/cpu/ns32000/ns32000.cpp
new file mode 100644
index 00000000000..6bf23e28289
--- /dev/null
+++ b/src/devices/cpu/ns32000/ns32000.cpp
@@ -0,0 +1,160 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/*****************************************************************************
+*
+* ns32000.cpp
+*
+* NS32000 CPU family
+*
+*****************************************************************************/
+
+#include "emu.h"
+#include "ns32000.h"
+#include "ns32000dasm.h"
+#include "debugger.h"
+
+//**************************************************************************
+// DEVICE INTERFACE
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(NS32008, ns32008_cpu_device, "ns32008", "National Semiconductor NS32008")
+DEFINE_DEVICE_TYPE(NS32016, ns32016_cpu_device, "ns32016", "National Semiconductor NS32016")
+DEFINE_DEVICE_TYPE(NS32032, ns32032_cpu_device, "ns32032", "National Semiconductor NS32032")
+
+
+//-------------------------------------------------
+// ns32000_cpu_device - constructor
+//-------------------------------------------------
+
+ns32000_cpu_device::ns32000_cpu_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int databits, int addrbits)
+ : cpu_device(mconfig, type, tag, owner, clock)
+ , m_program_config("program", ENDIANNESS_LITTLE, databits, addrbits, 0)
+ , m_icount(0)
+{
+}
+
+ns32008_cpu_device::ns32008_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : ns32000_cpu_device(mconfig, NS32008, tag, owner, clock, 8, 24)
+{
+}
+
+ns32016_cpu_device::ns32016_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : ns32000_cpu_device(mconfig, NS32016, tag, owner, clock, 16, 24)
+{
+}
+
+ns32032_cpu_device::ns32032_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : ns32000_cpu_device(mconfig, NS32032, tag, owner, clock, 32, 24)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void ns32000_cpu_device::device_start()
+{
+ set_icountptr(m_icount);
+
+ save_item(NAME(m_pc));
+ save_item(NAME(m_r));
+ save_item(NAME(m_f));
+
+ state_add(STATE_GENPC, "GENPC", m_pc).noshow();
+ state_add(STATE_GENPCBASE, "CURPC", m_pc).noshow();
+
+ // dedicated registers
+ state_add(NS32000_PC, "PC", m_pc);
+ state_add(NS32000_SB, "SB", m_sb);
+ state_add(NS32000_FP, "FP", m_fp);
+ state_add(NS32000_SP1, "SP1", m_sp1);
+ state_add(NS32000_SP0, "SP0", m_sp0);
+ state_add(NS32000_INTBASE, "INTBASE", m_intbase);
+ state_add(NS32000_PSR, "PSR", m_psr);
+ state_add(NS32000_MOD, "MOD", m_mod);
+
+ // general registers
+ for (unsigned i = 0; i < 8; i++)
+ state_add(NS32000_R0 + i, util::string_format("R%d", i).c_str(), m_r[i]);
+
+ // floating point registers
+ //for (unsigned i = 0; i < 8; i++)
+ // state_add(NS32000_R7 + i, util::string_format("F%d", i).c_str(), m_f[i]);
+
+ // set our instruction counter
+ //set_icountptr(m_icount);
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void ns32000_cpu_device::device_reset()
+{
+ m_nmi_line = false;
+ m_irq_line = false;
+
+ m_pc = 0;
+}
+
+//-------------------------------------------------
+// execute_run - execute a timeslice's worth of
+// opcodes
+//-------------------------------------------------
+
+void ns32000_cpu_device::execute_run()
+{
+ while (m_icount > 0)
+ {
+ debugger_instruction_hook(m_pc);
+
+ m_icount--;
+ }
+}
+
+//-------------------------------------------------
+// execute_set_input - act on a changed input/
+// interrupt line
+//-------------------------------------------------
+
+void ns32000_cpu_device::execute_set_input(int inputnum, int state)
+{
+ switch (inputnum)
+ {
+ case INPUT_LINE_NMI:
+ // NMI is edge triggered
+ m_nmi_line = m_nmi_line || (state == ASSERT_LINE);
+ break;
+
+ case INPUT_LINE_IRQ0:
+ // IRQ is line triggered
+ m_irq_line = state == ASSERT_LINE;
+ break;
+ }
+}
+
+//-------------------------------------------------
+// memory_space_config - return the configuration
+// of the specified address space, or nullptr if
+// the space doesn't exist
+//-------------------------------------------------
+
+device_memory_interface::space_config_vector ns32000_cpu_device::memory_space_config() const
+{
+ return space_config_vector{ std::make_pair(AS_PROGRAM, &m_program_config) };
+}
+
+bool ns32000_cpu_device::memory_translate(int spacenum, int intention, offs_t &address)
+{
+ return true;
+}
+
+//-------------------------------------------------
+// disassemble - call the disassembly
+// helper function
+//-------------------------------------------------
+
+std::unique_ptr<util::disasm_interface> ns32000_cpu_device::create_disassembler()
+{
+ return std::make_unique<ns32000_disassembler>();
+}