Claim: The support chip for U880 designated U82530DC04 and U82530DC06, is a serial communications controller, and the support chip designated U8272D04 and U8272D08, also for the U880 (a microprocessor), is a floppy-disk controller.
Evidence: U82530DC04, U82530DC06 serial communications controller U8272D04, U8272D08 floppy-disk controller The U880 is an 8-bit microprocessor that was manufactured by VEB Mikroelektronik "Karl Marx" Erfurt (abbreviated as MME; part of Kombinat Mikroelektronik Erfurt) in the German Democratic Republic.