diff options
Diffstat (limited to 'src/devices/cpu/cosmac/cosmac.h')
-rw-r--r-- | src/devices/cpu/cosmac/cosmac.h | 71 |
1 files changed, 66 insertions, 5 deletions
diff --git a/src/devices/cpu/cosmac/cosmac.h b/src/devices/cpu/cosmac/cosmac.h index 54e519f44ed..e076d5afe4d 100644 --- a/src/devices/cpu/cosmac/cosmac.h +++ b/src/devices/cpu/cosmac/cosmac.h @@ -69,7 +69,7 @@ Type Internal ROM Internal RAM Timer Pin 16 (*) ------------------------------------------------------------------ CDP1802 none none no Vcc - CDP1803 ? ? ? ? + CDP1803 ? ? ? ? does not exist? CDP1804 2 KB 64 bytes yes ? CDP1805 none 64 bytes yes _ME CDP1806 none none yes Vdd @@ -333,6 +333,16 @@ protected: void out(); void inp(); + // extended opcodes + void rldi(); + void rlxa(); + void rsxd(); + void rnx(); + void bci(); + void bxi(); + void ldc(); + void gec(); + const address_space_config m_program_config; const address_space_config m_io_config; @@ -359,6 +369,7 @@ protected: enum class cosmac_state : u8 { STATE_0_FETCH = 0, + STATE_0_FETCH_2ND, STATE_1_INIT, STATE_1_EXECUTE, STATE_1_EXECUTE_2ND, @@ -369,7 +380,7 @@ protected: // internal state uint16_t m_pc; // fake program counter - uint8_t m_op; // current opcode + uint16_t m_op; // current opcode uint8_t m_flagsio; // flags storage for state saving cosmac_state m_state; // state cosmac_mode m_mode; // control mode @@ -405,7 +416,8 @@ protected: // opcode/condition tables typedef void (cosmac_device::*ophandler)(); - virtual cosmac_device::ophandler get_ophandler(uint8_t opcode) const = 0; + virtual cosmac_device::ophandler get_ophandler(uint16_t opcode) const = 0; + virtual bool has_extended_opcodes() { return false; } }; @@ -421,10 +433,11 @@ protected: // device_disasm_interface overrides virtual std::unique_ptr<util::disasm_interface> create_disassembler() override; - virtual cosmac_device::ophandler get_ophandler(uint8_t opcode) const override; + virtual cosmac_device::ophandler get_ophandler(uint16_t opcode) const override; virtual void output_state_code() override; +private: static const ophandler s_opcodetable[256]; }; @@ -438,18 +451,66 @@ public: cdp1802_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); protected: + cdp1802_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); + // device_disasm_interface overrides virtual std::unique_ptr<util::disasm_interface> create_disassembler() override; - virtual cosmac_device::ophandler get_ophandler(uint8_t opcode) const override; + virtual cosmac_device::ophandler get_ophandler(uint16_t opcode) const override; +private: static const ophandler s_opcodetable[256]; }; +// ======================> cdp1804_device + +class cdp1804_device : public cdp1802_device +{ +public: + // construction/destruction + cdp1804_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + cdp1804_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); + + virtual cosmac_device::ophandler get_ophandler(uint16_t opcode) const override; + virtual bool has_extended_opcodes() override { return true; } + +private: + static const ophandler s_opcodetable_ex[256]; +}; + + +// ======================> cdp1805_device + +class cdp1805_device : public cdp1804_device +{ +public: + // construction/destruction + cdp1805_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + cdp1805_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); +}; + + +// ======================> cdp1806_device + +class cdp1806_device : public cdp1805_device +{ +public: + // construction/destruction + cdp1806_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); +}; + + // device type definition DECLARE_DEVICE_TYPE(CDP1801, cdp1801_device) DECLARE_DEVICE_TYPE(CDP1802, cdp1802_device) +DECLARE_DEVICE_TYPE(CDP1804, cdp1804_device) +DECLARE_DEVICE_TYPE(CDP1805, cdp1805_device) +DECLARE_DEVICE_TYPE(CDP1806, cdp1806_device) #endif // MAME_CPU_COSMAC_COSMAC_H |