*******************************************************************
- format summary

  - information block
    INFO - state file information
    VERN - version number

  - array
    WRAM - work ram data
    SRAM - SRAM data
    VRAM - VRAM data
    OAM  - OAM data
    PAL  - palette data

  -register
    SPCF - SPC700 state   (This block is equal to "SPC file")
    SREG - SNES registers (details are described later)
    SPCP - 65816<>SPC700 ports
      00 - 03: SPC700 to 65816 ports
      04 - 07: 65816 to SPC700 ports
    PPUR - PPU registers  ($2100 - $213F)
    CPUR - 65816 registers
      00: reg_a
      02: reg_x
      04: reg_y
      06: reg_d
      08: reg_s
      10: ----
      12: reg_pc
      14: reg_dbr
      18: reg_pbr
      22: reg_p
      23: wai ("wait for interrupt" state)
    INST - SNESGT internal state
    HDST - SNESGT internal state

    * "INST" and "HDST" can be composed of other data such as "SREG".

//
// "SREG" definition
// This structure is aligned to 8 byte boundary
//
struct snes_reg{
  byte  INITDISP;
  byte  OBSEL;
  word  OAMADD;
  byte  OAMDATA;
  byte  BGMODE;
  byte  MOSAIC;
  byte  BG1SC;
  byte  BG2SC;
  byte  BG3SC;
  byte  BG4SC;
  byte  BG12NBA;
  byte  BG34NBA;
  word  BG1HOFS;
  word  BG1VOFS;
  word  BG2HOFS;
  word  BG2VOFS;
  word  BG3HOFS;
  word  BG3VOFS;
  word  BG4HOFS;
  word  BG4VOFS;
  byte  VMAIN;
  word  VMADD;
  word  VMDATA;
  byte  M7SEL;
  word  M7A;
  word  M7B;
  word  M7C;
  word  M7D;
  word  M7X;
  word  M7Y;
  byte  CGADD;
  byte  CGDATA;
  byte  W12SEL;
  byte  W34SEL;
  byte  WOBJSEL;
  byte  WH0;
  byte  WH1;
  byte  WH2;
  byte  WH3;
  byte  WBGLOG;
  byte  WOBJLOG;
  byte  TM;
  byte  TD;
  byte  TMW;
  byte  TSW;
  byte  CGWSEL;
  byte  CGADSUB;
  byte  COLDATA;
  byte  SETINI;

  byte  MPYL;
  byte  MPYM;
  byte  MPYH;
  byte  SLHV;

  byte  OAMDATAREAD;
  word  VMDATAREAD;
  byte  CGDATAREAD;

  word  OPHCT;
  word  OPVCT;
  byte  STAT77;
  byte  STAT78;

  byte  WMDATA;
  dword WMADD;

  byte  NMITIMEN;
  byte  WRIO;
  byte  WRMPYA;
  byte  WRMPYB;
  word  WRDIV;
  byte  WRDIVB;

  word  HTIME;
  word  VTIME;

  byte  MDMAEN;
  byte  HDMAEN;

  byte  MEMSEL;
  byte  RDNMI;
  byte  TIMEUP;
  byte  HVBJOY;

  byte  RDIO;
  word  RDDIV;
  word  RDMPY;

  word  JOY1;
  word  JOY2;
  word  JOY3;
  word  JOY4;

  struct dma_reg{
    byte  DMAPX;
    byte  BBADX;
    word  A1TX;
    byte  A1BX;
    word  DASX;
    word  DASBX;
    word  A2AX;
    byte  NTRLX;
  }dma[8];
};

-- 
GIGO <gigout@gmail.com>