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Diffstat (limited to 'src/devices/cpu/upd78k/upd78k2.h')
-rw-r--r-- | src/devices/cpu/upd78k/upd78k2.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/devices/cpu/upd78k/upd78k2.h b/src/devices/cpu/upd78k/upd78k2.h new file mode 100644 index 00000000000..48210a28124 --- /dev/null +++ b/src/devices/cpu/upd78k/upd78k2.h @@ -0,0 +1,116 @@ +// license:BSD-3-Clause +// copyright-holders:AJR +/********************************************************************** + + NEC 78K/II series 8-bit single-chip microcontrollers + +**********************************************************************/ + +#ifndef MAME_CPU_UPD78K_UPD78K2_H +#define MAME_CPU_UPD78K_UPD78K2_H + +#pragma once + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> upd78k2_device + +class upd78k2_device : public cpu_device +{ +public: + enum { + UPD78K2_PC, + UPD78K2_PSW, UPD78K2_RBS, UPD78K2_SP, + UPD78K2_AX, UPD78K2_BC, + UPD78K2_DE, UPD78K2_HL, + UPD78K2_X, UPD78K2_A, UPD78K2_C, UPD78K2_B, + UPD78K2_E, UPD78K2_D, UPD78K2_L, UPD78K2_H + }; + + // TODO: callbacks and configuration thereof + +protected: + upd78k2_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int iram_bits, address_map_constructor mem_map, address_map_constructor sfr_map); + + // 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 u64 execute_clocks_to_cycles(u64 clocks) const noexcept override { return (clocks + 2 - 1) / 2; } + virtual u64 execute_cycles_to_clocks(u64 cycles) const noexcept override { return (cycles * 2); } + + // 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; + +private: + // internal memory map + void iram_map(address_map &map) ATTR_COLD; + + // internal helpers + inline u8 register_base() const noexcept; + + // address spaces, caches & configuration + address_space_config m_program_config; + address_space_config m_iram_config; + address_space_config m_sfr_config; + const offs_t m_iram_addrmask; + memory_access<20, 0, 0, ENDIANNESS_LITTLE>::cache m_program_cache; + memory_access< 8, 1, 0, ENDIANNESS_LITTLE>::cache m_iram_cache; + memory_access<20, 0, 0, ENDIANNESS_LITTLE>::specific m_program_space; + memory_access< 8, 1, 0, ENDIANNESS_LITTLE>::specific m_sfr_space; + + // core registers and execution state + u16 m_pc; + u16 m_ppc; + u8 m_psw; + u16 m_sp; + s32 m_icount; +}; + +// ======================> upd78210_device + +class upd78210_device : public upd78k2_device +{ +public: + // device type constructor + upd78210_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // device_disasm_interface overrides + virtual std::unique_ptr<util::disasm_interface> create_disassembler() override; + +private: + // type-specific internal memory maps + void sfr_map(address_map &map) ATTR_COLD; +}; + +// ======================> upd78213_device + +class upd78213_device : public upd78k2_device +{ +public: + // device type constructor + upd78213_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // device_disasm_interface overrides + virtual std::unique_ptr<util::disasm_interface> create_disassembler() override; + +private: + // type-specific internal memory maps + void mem_map(address_map &map) ATTR_COLD; + void sfr_map(address_map &map) ATTR_COLD; +}; + +// device type declarations +DECLARE_DEVICE_TYPE(UPD78210, upd78210_device) +DECLARE_DEVICE_TYPE(UPD78213, upd78213_device) + +#endif // MAME_CPU_UPD78K_UPD78K2_H |