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Building on UC Berkeley RISC and Sun compiler and operating system developments, SPARC architecture was highly adaptable to evolving semiconductor, software, and system technology and user needs. The architecture delivered the highest performance, scalable workstations and servers, for engineering, business, Internet, and cloud computing uses.
In the 68k, a full 1 ⁄ 3 of the transistors were used for this microcoding. [19] In 1979, David Patterson was sent on a sabbatical from the University of California, Berkeley to help DEC's west-coast team improve the VAX microcode. Patterson was struck by the complexity of the coding process and concluded it was untenable. [20]
The first documented computer architecture was in the correspondence between Charles Babbage and Ada Lovelace, describing the analytical engine.While building the computer Z1 in 1936, Konrad Zuse described in two patent applications for his future projects that machine instructions could be stored in the same storage used for data, i.e., the stored-program concept.
Hennessy has a history of strong interest and involvement in college-level computer education. He co-authored, with David Patterson, two well-known books on computer architecture, Computer Organization and Design: the Hardware/Software Interface and Computer Architecture: A Quantitative Approach, [5] which introduced the DLX RISC
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The advantages of HLLCAs can be alternatively achieved in HLL Computer Systems (language-based systems) in alternative ways, primarily via compilers or interpreters: the system is still written in a HLL, but there is a trusted base in software running on a lower-level architecture. This has been the approach followed since circa 1980: for ...
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His most recent book is with Andrew Waterman on the open architecture RISC-V: The RISC-V Reader: An Open Architecture Atlas (1st Edition) (ISBN 978-0999249109). His articles include: Patterson, David; Ditzel, David (1980). "The Case for the Reduced Instruction Set Computer" (PDF). ACM SIGARCH Computer Architecture News. 8 (6): 5– 33.