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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/**************************\
*
* SunPlus u'nSP emulator
*
* by Ryan Holtz
*
\**************************/
#pragma once
#ifndef __UNSP_H__
#define __UNSP_H__
enum
{
UNSP_SP = 1,
UNSP_R1,
UNSP_R2,
UNSP_R3,
UNSP_R4,
UNSP_BP,
UNSP_SR,
UNSP_PC,
UNSP_GPR_COUNT = UNSP_PC,
UNSP_IRQ,
UNSP_FIQ,
UNSP_SB
};
enum
{
UNSP_IRQ0_LINE = 0,
UNSP_IRQ1_LINE,
UNSP_IRQ2_LINE,
UNSP_IRQ3_LINE,
UNSP_IRQ4_LINE,
UNSP_IRQ5_LINE,
UNSP_IRQ6_LINE,
UNSP_IRQ7_LINE,
UNSP_FIQ_LINE,
UNSP_BRK_LINE,
UNSP_NUM_LINES
};
class unsp_device : public cpu_device
{
public:
// construction/destruction
unsp_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_execute_interface overrides
virtual uint32_t execute_min_cycles() const override { return 5; }
virtual uint32_t execute_max_cycles() const override { return 5; }
virtual uint32_t execute_input_lines() const override { return 0; }
virtual void execute_run() override;
virtual void execute_set_input(int inputnum, int state) override;
// device_memory_interface overrides
virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override { return (spacenum == AS_PROGRAM) ? &m_program_config : nullptr; }
// device_state_interface overrides
virtual void state_import(const device_state_entry &entry) override;
virtual void state_export(const device_state_entry &entry) override;
// device_disasm_interface overrides
virtual uint32_t disasm_min_opcode_bytes() const override { return 2; }
virtual uint32_t disasm_max_opcode_bytes() const override { return 4; }
virtual offs_t disasm_disassemble(std::ostream &stream, offs_t pc, const uint8_t *oprom, const uint8_t *opram, uint32_t options) override;
private:
address_space_config m_program_config;
uint16_t m_r[16];
uint8_t m_irq;
uint8_t m_fiq;
uint16_t m_curirq;
uint16_t m_sirq;
uint8_t m_sb;
uint8_t m_saved_sb;
address_space *m_program;
int m_icount;
uint32_t m_debugger_temp;
void unimplemented_opcode(uint16_t op);
inline uint16_t READ16(uint32_t address);
inline void WRITE16(uint32_t address, uint16_t data);
inline void unsp_update_nz(uint32_t value);
inline void unsp_update_nzsc(uint32_t value, uint16_t r0, uint16_t r1);
inline void unsp_push(uint16_t value, uint16_t *reg);
inline uint16_t unsp_pop(uint16_t *reg);
};
extern const device_type UNSP;
#endif /* __UNSP_H__ */
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