Commodore International Ltd was showing its new Unix version of the Amiga upmarket home computer at the Hannover Fair last week, but once again the company failed to put a price or delivery date on the box, although it did give a few more details. The Amiga 2500 UX is almost the same as the Motorola 68020-based Amiga 2000, but adds a 68851 chip for memory management. The 68020 is clocked at a slow 14.2MHz and the 2500 comes standard with a 68881 maths co-processor and 3Mb of main memory. Overall, despite the similarity, Commodore claims that the 2500 UX offers up to four times the performance of the Amiga 2000. It will run Unix System V.3.1 and can also run AmigaDOS in a separate partition on the 80Mb disk drive, which has a racey 19nS access time. The bundled software includes standard Unix editors, a word processor and a C compiler. The company has also been showing an enhanced and smaller version of its PC40 AT-alike. The PC40-III has a graphics adaptor and video controller for EGA and VGA and operates at clock speeds 12MHz down to 6MHz. It has one 8-bit and three 16-bit expans ion slots, and has 1Mb as standard.