title: 8051 - PSW being set to 0X80 after CJNE
body: <p>I'm pretty new to 8051 and was testing it out.  After CJNE executes, it sets PSW to 0x80.  Why does it do that?  Below is the code.  I am using the EdSim51DI simulator.  </p>
  
  <p>Any help would greatly be appreciated</p>