bsnes/asnes/chip/spc7110/spc7110.hpp

/*****
 * SPC7110 emulator - version 0.04 (2010-02-14)
 * Copyright (c) 2008-2010, byuu and neviksti
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * The software is provided "as is" and the author disclaims all warranties
 * with regard to this software including all implied warranties of
 * merchantibility and fitness, in no event shall the author be liable for
 * any special, direct, indirect, or consequential damages or any damages
 * whatsoever resulting from loss of use, data or profits, whether in an
 * action of contract, negligence or other tortious action, arising out of
 * or in connection with the use or performance of this software.
 *****/

#include "decomp.hpp"

class SPC7110 : public MMIO {
public:
  void init();
  void enable();
  void power();
  void reset();

  unsigned datarom_addr(unsigned addr);

  unsigned data_pointer();
  unsigned data_adjust();
  unsigned data_increment();
  void set_data_pointer(unsigned addr);
  void set_data_adjust(unsigned addr);

  void update_time(int offset = 0);
  time_t create_time();

  uint8 mmio_read(unsigned addr);
  void mmio_write(unsigned addr, uint8 data);

  //spc7110decomp
  void decomp_init();
  uint8 decomp_read();

  void serialize(serializer&);
  SPC7110();

private:
  //==================
  //decompression unit
  //==================
  uint8 r4801;  //compression table low
  uint8 r4802;  //compression table high
  uint8 r4803;  //compression table bank
  uint8 r4804;  //compression table index
  uint8 r4805;  //decompression buffer index low
  uint8 r4806;  //decompression buffer index high
  uint8 r4807;  //???
  uint8 r4808;  //???
  uint8 r4809;  //compression length low
  uint8 r480a;  //compression length high
  uint8 r480b;  //decompression control register
  uint8 r480c;  //decompression status

  SPC7110Decomp decomp;

  //==============
  //data port unit
  //==============
  uint8 r4811;  //data pointer low
  uint8 r4812;  //data pointer high
  uint8 r4813;  //data pointer bank
  uint8 r4814;  //data adjust low
  uint8 r4815;  //data adjust high
  uint8 r4816;  //data increment low
  uint8 r4817;  //data increment high
  uint8 r4818;  //data port control register

  uint8 r481x;

  bool r4814_latch;
  bool r4815_latch;

  //=========
  //math unit
  //=========
  uint8 r4820;  //16-bit multiplicand B0, 32-bit dividend B0
  uint8 r4821;  //16-bit multiplicand B1, 32-bit dividend B1
  uint8 r4822;  //32-bit dividend B2
  uint8 r4823;  //32-bit dividend B3
  uint8 r4824;  //16-bit multiplier B0
  uint8 r4825;  //16-bit multiplier B1
  uint8 r4826;  //16-bit divisor B0
  uint8 r4827;  //16-bit divisor B1
  uint8 r4828;  //32-bit product B0, 32-bit quotient B0
  uint8 r4829;  //32-bit product B1, 32-bit quotient B1
  uint8 r482a;  //32-bit product B2, 32-bit quotient B2
  uint8 r482b;  //32-bit product B3, 32-bit quotient B3
  uint8 r482c;  //16-bit remainder B0
  uint8 r482d;  //16-bit remainder B1
  uint8 r482e;  //math control register
  uint8 r482f;  //math status

  //===================
  //memory mapping unit
  //===================
  uint8 r4830;  //SRAM write enable
  uint8 r4831;  //$[d0-df]:[0000-ffff] mapping
  uint8 r4832;  //$[e0-ef]:[0000-ffff] mapping
  uint8 r4833;  //$[f0-ff]:[0000-ffff] mapping
  uint8 r4834;  //???

  unsigned dx_offset;
  unsigned ex_offset;
  unsigned fx_offset;

  //====================
  //real-time clock unit
  //====================
  uint8 r4840;  //RTC latch
  uint8 r4841;  //RTC index/data port
  uint8 r4842;  //RTC status

  enum RTC_State { RTCS_Inactive, RTCS_ModeSelect, RTCS_IndexSelect, RTCS_Write };
  enum RTC_Mode  { RTCM_Linear = 0x03, RTCM_Indexed = 0x0c };
  unsigned rtc_state;
  unsigned rtc_mode;
  unsigned rtc_index;

  static const unsigned months[12];
  friend class SPC7110MCU;
  friend class SPC7110DCU;
  friend class SPC7110RAM;
};

class SPC7110MCU : public Memory {
public:
  unsigned size() const;
  uint8 read(unsigned addr);
  void write(unsigned addr, uint8 data);
};

class SPC7110DCU : public Memory {
public:
  uint8 read(unsigned addr);
  void write(unsigned addr, uint8 data);
};

class SPC7110RAM : public Memory {
public:
  unsigned size() const;
  uint8 read(unsigned addr);
  void write(unsigned addr, uint8 data);
};

extern SPC7110 spc7110;
extern SPC7110MCU spc7110mcu;
extern SPC7110DCU spc7110dcu;
extern SPC7110RAM spc7110ram;