Hi ! Right now in my project I have added :

• Bus with ram

  • read & write function
  • load from file function

• CPU

  • All registry (a, x, y, sp, pc, sr)
  • reset cpu function
  • update Z & N flag function
  • clock_tick with those opcode in it : BRK; DEY; TXA; TYA; TAY; LDA; TAX; INY; DEX; INX; NOP

(1st screenshot is official emulator 2nd is mine)