It is a XT (8086).
It has tape-port on the backside and if I disable the harddrive it boots into ROM-basic :D
IBM Archives: The first 10 years
I love the "Portable Personal Computer that can travel where the work is" but at 30lb weight I'd guess it helps to have a trolley to shift it! Could you imagine offering a 30lb computer to someone today and telling them that it's portable :-)
HP's 20-inch HDX "Dragon" Laptop Walked Through and Reviewed - Dragon - Gizmodo
EDIT: okay, it's 15.5lbs, but still - would you want to carry it?