Yarc Systems Inc, established in Thousand Oaks, California to create RISC-based co-processors for Apple Macintosh II computers, has adopted the Advanced Micro Devices Am29000 and Am29027 mathematics co-processor as the basis of its McCray RISC co processor board for the Macintosh II. Yarc reckons that the McCray, which uses a Harvard memory interface, provides users with performance above that of RISC workstations like the Sun-4 while retaining the icon-based Mac user interface. Yarc claims that with the co-processor, programs run 10 times faster than on the Mac II alone. The McCray conforms to the AMD Binary Interface Specification, making it easier to bring applications over to the Mac and enabling Am29000 compilers and development tools to be used to create applications for it on a DEC VAX or an MS-DOS micro.
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