The Memotech MTX500, MTX512 and RS128 were a series of Zilog Z80A processor-based home computers released by Memotech in 1983 and 1984. They were technically similar to MSX computers, but were not compatible.
Memotech Video Wall systems were initially made up of a Memotech MTX computer (an RS128 or MTX512S2) with a minimum of 128K RAM, attached through the printer port to nondescript black boxes packed with electronics to drive a wall of video monitors used in advertising displays, entertainment venues, etc. Some later systems were equipped with the MTX 2000 computer, before the company moved onto the industry standard PC platform.