In Ultima 8, the debug mode exists but not accessable without some
DEBUGing or using external programs that debug for you.  Here's how:
 
Using a text editor create a file called avatar.deb in the
\ULTIMA8\GAMEDAT directory with the following text:
 
E 12A
01 01
W
Q
 
then save the file and at the DOS prompt type:
 
CD \ULTIMA8\GAMEDAT
DEBUG AVATAR.DAT < AVATAR.DEB