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// license:BSD-3-Clause
// copyright-holders:hap
/*
Seiko Epson E0C6200 CPU core and E0C62 MCU family
*/
#ifndef MAME_CPU_E0C6200_E0C6200_H
#define MAME_CPU_E0C6200_E0C6200_H
class e0c6200_cpu_device : public cpu_device
{
public:
// construction/destruction
e0c6200_cpu_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock, address_map_constructor program, address_map_constructor data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_execute_interface overrides
virtual u32 execute_min_cycles() const noexcept override { return 5; }
virtual u32 execute_max_cycles() const noexcept override { return 14; } // longest opcode is 12 cycles, but interrupt service takes up to 14
virtual u32 execute_input_lines() const noexcept override { return 1; }
virtual void execute_run() override;
virtual void execute_one();
virtual bool check_interrupt() { return false; } // nothing to do by default
virtual void do_interrupt();
// device_memory_interface overrides
virtual space_config_vector memory_space_config() const override;
// device_disasm_interface overrides
virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
virtual void state_string_export(const device_state_entry &entry, std::string &str) const override;
address_space_config m_program_config;
address_space_config m_data_config;
address_space *m_program;
address_space *m_data;
u16 m_op;
u16 m_prev_op;
u8 m_irq_vector; // low 4 bits for new programcounter after interrupt
int m_irq_id; // for standard_irq_callback(id)
bool m_possible_irq; // indicates interrupts need to be re-checked
bool m_halt; // cpu halt state
bool m_sleep; // cpu sleep state
int m_icount;
u16 m_pc; // 13-bit programcounter: 1-bit bank, 4-bit page, 8-bit 'step'
u16 m_prev_pc;
u16 m_npc; // new bank/page prepared by pset
u16 m_jpc; // actual bank/page destination for jumps
// all work registers are 4-bit
u8 m_a; // accumulator
u8 m_b; // generic
u8 m_xp, m_xh, m_xl; // 12-bit index register when combined
u8 m_yp, m_yh, m_yl; // "
u8 m_sp; // stackpointer (SPH, SPL)
u8 m_f; // flags
enum
{
C_FLAG = 1,
Z_FLAG = 2,
D_FLAG = 4,
I_FLAG = 8
};
// internal data memory read/write
u8 read_mx();
u8 read_my();
u8 read_mn();
void write_mx(u8 data);
void write_my(u8 data);
void write_mn(u8 data);
// common stack ops
void push(u8 data);
u8 pop();
void push_pc();
void pop_pc();
// misc internal helpers
void set_cf(u8 data);
void set_zf(u8 data);
void inc_x();
void inc_y();
void do_branch(int condition = 1);
// opcode handlers
u8 op_inc(u8 x);
u8 op_dec(u8 x);
u8 op_add(u8 x, u8 y, int decimal = 0);
u8 op_adc(u8 x, u8 y, int decimal = 0);
u8 op_sub(u8 x, u8 y, int decimal = 0);
u8 op_sbc(u8 x, u8 y, int decimal = 0);
u8 op_and(u8 x, u8 y);
u8 op_or(u8 x, u8 y);
u8 op_xor(u8 x, u8 y);
u8 op_rlc(u8 x);
u8 op_rrc(u8 x);
};
#endif // MAME_CPU_E0C6200_E0C6200_H
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