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Diffstat (limited to 'src/devices/cpu/i4004/i4004.h')
-rw-r--r-- | src/devices/cpu/i4004/i4004.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/devices/cpu/i4004/i4004.h b/src/devices/cpu/i4004/i4004.h new file mode 100644 index 00000000000..956218f3723 --- /dev/null +++ b/src/devices/cpu/i4004/i4004.h @@ -0,0 +1,110 @@ +// license:BSD-3-Clause +// copyright-holders:Miodrag Milanovic +#ifndef __I4004_H__ +#define __I4004_H__ + + + +/*************************************************************************** + CONSTANTS +***************************************************************************/ + +enum +{ + I4004_PC, + I4004_A, + I4004_R01, I4004_R23, I4004_R45, I4004_R67, I4004_R89, I4004_RAB, I4004_RCD, I4004_REF, + I4004_ADDR1,I4004_ADDR2,I4004_ADDR3,I4004_ADDR4,I4004_RAM, + I4004_GENPC = STATE_GENPC, + I4004_GENSP = STATE_GENSP, + I4004_GENPCBASE = STATE_GENPCBASE +}; + +/*************************************************************************** + TYPE DEFINITIONS +***************************************************************************/ + +class i4004_cpu_device : public cpu_device +{ +public: + // construction/destruction + i4004_cpu_device(const machine_config &mconfig, const char *_tag, device_t *_owner, UINT32 _clock); + + void set_test(UINT8 val); + +protected: + // device-level overrides + virtual void device_start(); + virtual void device_reset(); + + // device_execute_interface overrides + virtual UINT32 execute_min_cycles() const { return 8; } + virtual UINT32 execute_max_cycles() const { return 16; } + virtual void execute_run(); + + // device_memory_interface overrides + virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const + { + switch (spacenum) + { + case AS_PROGRAM: return &m_program_config; + case AS_IO: return &m_io_config; + case AS_DATA: return &m_data_config; + default: return NULL; + } + } + + // device_state_interface overrides + virtual void state_import(const device_state_entry &entry); + virtual void state_export(const device_state_entry &entry); + virtual void state_string_export(const device_state_entry &entry, std::string &str); + + // device_disasm_interface overrides + virtual UINT32 disasm_min_opcode_bytes() const { return 1; } + virtual UINT32 disasm_max_opcode_bytes() const { return 2; } + virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options); + + UINT8 ROP(); + UINT8 READ_ROM(); + void WPM(); + UINT8 ARG(); + UINT8 RM(); + UINT8 RMS(UINT32 a); + void WM(UINT8 v); + void WMP(UINT8 v); + void WMS(UINT32 a, UINT8 v); + UINT8 RIO(); + void WIO(UINT8 v); + UINT8 GET_REG(UINT8 num); + void SET_REG(UINT8 num, UINT8 val); + void PUSH_STACK(); + void POP_STACK(); + void execute_one(int opcode); + + address_space_config m_program_config; + address_space_config m_io_config; + address_space_config m_data_config; + + UINT8 m_A; // Accumulator + UINT8 m_R[8]; + PAIR m_ADDR[4]; // Address registers + PAIR m_RAM; + UINT8 m_C; // Carry flag + UINT8 m_TEST; // Test PIN status + PAIR m_PC; // It is in fact one of ADDR regs + UINT8 m_flags; // used for I/O only + + address_space *m_program; + direct_read_data *m_direct; + address_space *m_data; + address_space *m_io; + int m_icount; + int m_pc_pos; // PC possition in ADDR + int m_addr_mask; +}; + + +extern const device_type I4004; + + +#endif |