Biographical sketches of authors

Lisa Cranton Heller IBM Systems and Technology Group, 2455 South Road, Poughkeepsie, New York 12601 (cranton@us.ibm.com). Ms. Heller received a B.S.E.E. degree from the Massachusetts Institute of Technology in 1984, joining IBM that same year. She is a Senior Technical Staff Member and was the millicode team leader for the z990 processor. During her career, she has worked in the areas of processor virtualization (SIE), quiesce design, and TLB. Ms. Heller is currently working on future IBM zSeries processors.

Mark S. Farrell IBM Systems and Technology Group, 2455 South Road, Poughkeepsie, New York 12601 (msf@us.ibm.com). Mr. Farrell received a B.S.E.E. degree from the University of Pittsburgh in 1977. He joined IBM that same year to work in the processor microcode area. He worked on the architecture and design of many microcode projects for S/390* systems, and was the leader in the switch to millicode implementations for the CMOS processors. He is a Senior Technical Staff Member, and has been the millicode team leader for many of the recent CMOS processors. Mr. Farrell is an author of 27 U.S. patents; he has received two IBM Outstanding Technical Achievement Awards, three IBM Outstanding Innovation Awards, and two IBM Corporate Awards. He currently works on the development of future IBM server processors and systems.