Date   : Mon, 22 Apr 1985 15:16:47-EST
From   : Lee.Sailer@CMU-CS-C.ARPA
Subject: Anchor Mark XII

There was a post awhile back about how to tell if you need to get a new
ROM for your Mark XII.  Mine failed the test, so I called Anchor.  They said
that the ATI1 command reports a checksum, and that if you get
254, 083, or 104, then you should call them.  I got 129, and they said that
is fine.

Also, if AT? responds with an "Error", this means that you have a ROM that
is capable of sending a Break.  If not, the upgrade is $40.

At leat, this is what I think he said.