rom_size = 32768
rom = bytearray([0xea] * rom_size)

rom[0] = 0xa9 # load to a Register
rom[1] = 0x42

rom[2] = 0x8d # write a register to memory

# address 6000
rom[3] = 0x00
rom[4] = 0x60

# address 8000 - little endien
rom[0x7ffc] = 0x00
rom[0x7ffd] = 0x80

with open("rom.bin", "wb") as file: 
    file.write(rom)