It is equipped with an Intel 80C86 processor at 9.54 MHz, 1 MB RAM of which 384 kB can be used for LIM EMS or as a RAMdisk, CGA graphics card, one 720 kB 3.5 "floppy drive and one 20 MB hard drive (Some models had two floppy drives and no harddrive controller card.) MS-DOS 3.30 was included with the laptop. It was the first laptop with a swappable battery pack. Its original price was 6499 USD.

The T1200's hard drive has an unusual 26-pin interface made by JVC, which is incompatible with ST506 / 412 or ATA interfaces. Floppy drives were connected using similar 26-pin connectors. The computer has many unique functions, such as Hard RAM - a small part of RAM was battery-backed and can be used as a non-volatile hard drive. Another function allowed to suspend the system or power control the hard drive (which was still dependent on the hard disk's on / off switch).