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Diffstat (limited to 'src/devices/cpu/ns32000/ns32000.cpp')
-rw-r--r-- | src/devices/cpu/ns32000/ns32000.cpp | 160 |
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>(); +} |