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Diffstat (limited to 'src/devices/cpu/mk1/mk1.h')
-rw-r--r-- | src/devices/cpu/mk1/mk1.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/devices/cpu/mk1/mk1.h b/src/devices/cpu/mk1/mk1.h new file mode 100644 index 00000000000..85d20a61b26 --- /dev/null +++ b/src/devices/cpu/mk1/mk1.h @@ -0,0 +1,81 @@ +// license:BSD-3-Clause +// copyright-holders:AJR + +#ifndef MAME_CPU_MK1_MK1_H +#define MAME_CPU_MK1_MK1_H + +#pragma once + +class mk1_cpu_device : public cpu_device +{ +public: + enum { + MK1_PC, MK1_OP, + MK1_W, MK1_IP, + MK1_TOS, MK1_RS, + MK1_PSP, MK1_RSP, + MK1_A, MK1_B, MK1_ALU, MK1_F, + MK1_IE + }; + + static constexpr int AS_STACK = AS_DATA + 1; + static constexpr int IRQ_LINE = 0; + + // device type constructor + mk1_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // device-level overrides + virtual void device_start() override ATTR_COLD; + virtual void device_reset() override ATTR_COLD; + + // device_execute_interface overrides + virtual void execute_run() override; + virtual void execute_set_input(int linenum, int state) override; + + // device_memory_interface overrides + virtual space_config_vector memory_space_config() const override; + + // device_state_interface overrides + virtual void state_string_export(const device_state_entry &entry, std::string &str) const override; + + // device_disasm_interface overrides + virtual std::unique_ptr<util::disasm_interface> create_disassembler() override; + +private: + // internal helpers + void alu_update(); + void set_alu_function(u8 data); + void set_irq_enable(bool state); + void execute_one(); + + static const u8 s_alu_decode[16]; + + // address spaces + const address_space_config m_program_config; + const address_space_config m_data_config; + const address_space_config m_stack_config; + memory_access<12, 0, 0, ENDIANNESS_LITTLE>::cache m_cache; + memory_access<16, 0, 0, ENDIANNESS_LITTLE>::specific m_data; + memory_access<10, 0, 0, ENDIANNESS_LITTLE>::specific m_stack; + + // internal state + u16 m_pc; + u8 m_inst; + u8 m_op_latch; + u16 m_index_reg[2]; + u8 m_sp[2]; + u8 m_alu_a; + u8 m_alu_b; + u8 m_alu_function; + u8 m_alu_result; + u8 m_cond_flags; + bool m_irq_asserted; + bool m_irq_enabled; + s32 m_icount; +}; + +// device type declaration +DECLARE_DEVICE_TYPE(MK1_CPU, mk1_cpu_device) + +#endif // MAME_CPU_MK1_MK1_H |