//NEC uPD7720 (not supported)
//NEC uPD7725
//NEC uPD96050

#pragma once

namespace Processor {

struct uPD96050 {
  auto power() -> void;
  auto exec() -> void;
  auto serialize(serializer&) -> void;

  auto execOP(uint24 opcode) -> void;
  auto execRT(uint24 opcode) -> void;
  auto execJP(uint24 opcode) -> void;
  auto execLD(uint24 opcode) -> void;

  auto readSR() -> uint8;
  auto writeSR(uint8 data) -> void;

  auto readDR() -> uint8;
  auto writeDR(uint8 data) -> void;

  auto readDP(uint12 addr) -> uint8;
  auto writeDP(uint12 addr, uint8 data) -> void;

  auto disassemble(uint14 ip) -> string;

  enum class Revision : uint { uPD7725, uPD96050 } revision;
  uint24 programROM[16384];
  uint16 dataROM[2048];
  uint16 dataRAM[2048];

  //registers.cpp
  struct Flag {
    inline operator uint() const;
    inline auto operator=(uint d) -> uint;

    bool s1, s0, c, z, ov1, ov0;
  };

  struct Status {
    inline operator uint() const;
    inline auto operator=(uint d) -> uint;

    bool rqm, usf1, usf0, drs, dma, drc, soc, sic, ei, p1, p0;
  };

  struct Regs {
    uint16 stack[16];  //LIFO
    varuint pc;        //program counter
    varuint rp;        //ROM pointer
    varuint dp;        //data pointer
    uint4 sp;          //stack pointer
    int16 k;
    int16 l;
    int16 m;
    int16 n;
    int16 a;           //accumulator
    int16 b;           //accumulator
    Flag flaga;
    Flag flagb;
    uint16 tr;         //temporary register
    uint16 trb;        //temporary register
    Status sr;         //status register
    uint16 dr;         //data register
    uint16 si;
    uint16 so;
  } regs;
};

}