A P6/GTL+ chipset, it was Intel's miserably failed attempt at producing an integrated core logic chipset.
Instead of integrating a quality video subsystem, they opted to integrate their i740 and leave out the option for an AGP slot. This, combined with Pentium III incompatibility, caused the i810 to be left for specific niche markets, and it failed to be the mainstream "solution" that it was intended to be.
See also: GTL+, useless