Corollary Inc claims the first 80486-based multi-processor, and says its Symmetrical Multi-Processing Extended Kernel, and extension of SCO Xenix 386 and Unix 386, now supports the 80486. The Corollary system takes up to 10 processors, with no conversion needed for off-the-shelf software. The set includes a high speed proprietary bus,up to 10 processor boards and 64Mb memory, and extends the 386/smp system first introduced at UniForum in February. The system uses a dual bus architecture that includes the AT bus for peripherals and a 64Mb per second, 32-bit C-bus for processor and mem ory traffic. Each board has a 256Kb write-back cache and four specialis ed input-output ports for connecting Corollary’s eight-port terminal con centrator. Fully configured systems can support up to 256 users. Ships start this month at a suggested end- user price of $7,500 per CPU board.