Cambridge-based Sinclair Research Ltd is working on a 250 MIPS RISC processor likely to be available within a year, according to a report in PC Dealer: designed by Sinclair Research's Chris Shelton, the chip is aimed at graphics workstations and will be capable of emulating the IBM AT environment at high speed, although its main purpose will be for running specialised graphics algorithms - users will be given the capability of writing their own instructions for customised versions of the chip, which will have 256 bytes of user ROM and will cost UKP2,000, said the report.