Chuckrox

Agreee to all that orang3eph has said.
In addition, in case you are asking that - will the investor get $800 back since he bought the bond for $800? - then the answer is no, he is entitled to $1000 - full par value (and of course the coupons).

Practically, there have been cases of cognizant default, where the issuer and investor agree that the coupon payment will be paid late - to take care of liquidity or other issues. But, this may work only with loans or where the number of bondholders are limited or known.