enum : unsigned {
  OPTYPE_DP = 0,    //dp
  OPTYPE_DPX,       //dp,x
  OPTYPE_DPY,       //dp,y
  OPTYPE_IDP,       //(dp)
  OPTYPE_IDPX,      //(dp,x)
  OPTYPE_IDPY,      //(dp),y
  OPTYPE_ILDP,      //[dp]
  OPTYPE_ILDPY,     //[dp],y
  OPTYPE_ADDR,      //addr
  OPTYPE_ADDRX,     //addr,x
  OPTYPE_ADDRY,     //addr,y
  OPTYPE_IADDRX,    //(addr,x)
  OPTYPE_ILADDR,    //[addr]
  OPTYPE_LONG,      //long
  OPTYPE_LONGX,     //long, x
  OPTYPE_SR,        //sr,s
  OPTYPE_ISRY,      //(sr,s),y
  OPTYPE_ADDR_PC,   //pbr:addr
  OPTYPE_IADDR_PC,  //pbr:(addr)
  OPTYPE_RELB,      //relb
  OPTYPE_RELW,      //relw
};

void disassemble_opcode(char* output, uint32 addr);
uint8 dreadb(uint32 addr);
uint16 dreadw(uint32 addr);
uint32 dreadl(uint32 addr);
uint32 decode(uint8 offset_type, uint32 addr);