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// license:BSD-3-Clause
// copyright-holders:Patrick Mackinlay
#ifndef MAME_CPU_NS32000_NS32000_H
#define MAME_CPU_NS32000_NS32000_H
#pragma once
class ns32000_device : public cpu_device
{
public:
// construction/destruction
ns32000_device(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock);
protected:
ns32000_device(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock, int databits, int addrbits);
// device_t overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_execute_interface overrides
virtual u32 execute_min_cycles() const noexcept override { return 1; }
virtual u32 execute_max_cycles() const noexcept override { return 6; }
virtual u32 execute_input_lines() const noexcept override { return 2; }
virtual void execute_run() override;
virtual void execute_set_input(int inputnum, int state) override;
virtual bool execute_input_edge_triggered(int inputnum) const noexcept override { return inputnum == INPUT_LINE_NMI; }
// device_memory_interface overrides
virtual space_config_vector memory_space_config() const override;
virtual bool memory_translate(int spacenum, int intention, offs_t &address) override;
// device_state_interface overrides
virtual void state_string_export(device_state_entry const &entry, std::string &str) const override;
// device_disasm_interface overrides
virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
private:
enum addr_mode_type : unsigned
{
IMM,
REG,
MEM,
IND,
EXT,
TOS,
};
struct addr_mode
{
addr_mode(unsigned gen)
: gen(gen)
, base(0)
, disp(0)
{};
void rmw() { if (type == TOS) type = MEM; }
void addr() { if (type == TOS) type = MEM; }
void regaddr() { if (type == TOS) type = MEM; }
unsigned gen;
addr_mode_type type;
u32 base;
u32 disp;
};
// instruction decoding helpers
s32 displacement(unsigned &bytes);
void decode(addr_mode *mode, unsigned imm_size, unsigned &bytes);
// operand read/write helpers
u32 ea(addr_mode const mode);
u64 gen_read(addr_mode mode, unsigned size);
s64 gen_read_sx(addr_mode mode, unsigned size);
void gen_write(addr_mode mode, unsigned size, u64 data);
// other execution helpers
bool condition(unsigned const cc);
void flags(u32 const src1, u32 const src2, u32 const dest, unsigned const size, bool const subtraction);
void interrupt(unsigned const vector, u32 const return_address, bool const trap = true);
// configuration
address_space_config m_program_config;
address_space_config m_interrupt_config;
// emulation state
int m_icount;
memory_access<24, 1, 0, ENDIANNESS_LITTLE>::cache m_bus[16];
u32 m_pc; // program counter
u32 m_sb; // static base
u32 m_fp; // frame pointer
u32 m_sp1; // user stack pointer
u32 m_sp0; // interrupt stack pointer
u32 m_intbase; // interrupt base
u16 m_psr; // processor status
u16 m_mod; // module
u8 m_cfg; // configuration
u32 m_r[8];
u32 m_f[8];
bool m_nmi_line;
bool m_int_line;
bool m_wait;
};
class ns32008_device : public ns32000_device
{
public:
ns32008_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
};
class ns32016_device : public ns32000_device
{
public:
ns32016_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
};
class ns32032_device : public ns32000_device
{
public:
ns32032_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
};
DECLARE_DEVICE_TYPE(NS32008, ns32008_device)
DECLARE_DEVICE_TYPE(NS32016, ns32016_device)
DECLARE_DEVICE_TYPE(NS32032, ns32032_device)
#endif // MAME_CPU_NS32000_NS32000_H
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