Tseng Labs

Tseng Laboratories, Inc. (also known as Tseng Labs or TLI) was a maker of graphics chips and controllers for IBM PC compatibles, based in Newtown, Pennsylvania, and founded by Jack H-N Tseng.Founded in 1983, Tseng Labs' first product was designed to allow IBM PCs to run the CP/M Operating System. When an OEM deal for that product was cancelled, TLI introduced a combination multifunction and graphics, called Ultrapak, which upgraded IBM PC and XT compatible computers with some features of an IBM AT. Ultrapak also foreshadowed Tseng Labs penchant for enhancing graphics - by providing IBM Monochrome Display Adapter (MDA) and Hercules Graphics Card (HGC) compatibility along with their own special 132 column text modes. These extended text modes created a successful niche for TLI - the cards were popularly used by corporations for PCs that also emulated mainframe terminals that displayed 132 columns. The UltraPAK Short (a graphics-only version of UltraPAK) was the base design for the DFI MG-150, which was reported to be the best selling MDA/HGC compatible card of all time.