Schematic PDF, 1.16 MB, named Tin Yat 80A. Tin Yat appears to be a project code name, with 80A as a variant or revision marker, though the name does not state a brand.

PDF schematic titled Tin Yat 80A, which appears to be a project or platform code name rather than a retail model; the name gives no brand, board number or revision.

PDF schematic, 1.16 MB, named Tin Yat 80A; the name gives no brand, device type or board number, so the target hardware must be confirmed from the drawing itself.