Is it likely there is one of those  little batteries on it that would>now be dead and need replacing before I try to use it?>Congrats and no. This is your std XT (5160) MB just shoved in a case with a handle and monitor.>And, also, would this have a floppy controller on it that was capable>of reading and writing disks from systems like the TRS-80 with an SD boot track?>If it works on an XT it will work on a 5155. If not then no.