Color photograph of the 80286 microprocessor package. Clock speed: 6MHz (.9 MIPS) 10 MHz (1.5 MIPS) 12 MHz (2.66 MIPS). Transistor Count: 134,000. Chip Performance: 1.5 MIPS (millions of instructions per second). Circuit Line Size: 1.5 microns. Bus Width: 16 bits. Addressable memory: 16 megabytes. Virtual memory: 1 gigabyte. The 286 microprocessor were built on 6-inch silicon wafers. The 286, also known as the 80286, was the first Intel Processor that could run all the software written for its predecessor. This software compatibility remains a hallmark of Intel's family of microprocessor. Within 6 years of it release, there were an estimated 15 million 286- based personal computers installed around the world.