-1

guys.I read MBR from c disk to a memory such as 0:0200H,and then i debug it.however,when i arrive 0:7c18H REPZ 0:7c19H MOVSB i get a message 'CPU error:incorrect opcode.Killing process.' i dont know how to deal with it. any help will be appreciated.thanks.

jiych.guru
  • 664
  • 1
  • 5
  • 20

1 Answers1

0

REPZ MOVSB is a string move operation typically. Your MBR is likely looking to read a string it expects to be in memory causing it to fail.

Jeremiah Gowdy
  • 5,476
  • 3
  • 21
  • 33