Amdahl 470

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Amdahl 470, Amdahl Corporation's first machine, the Amdahl 470V/6 shipped in 1975, was a plug compatible mainframe computer designed by former IBM Fellow and chief architect of IBM System/360 Gene Amdahl. Competing with IBM in the mainframe market, it was a less expensive, more reliable and faster replacement for the System 370/168. By purchasing an Amdahl 470 and plug-compatible peripheral devices from third-party manufacturers, customers could now run S/360 and S/370 applications under VM without buying actual IBM hardware.

=Technology= The Amdahl 470V/6 uses large scale integration (LSI) semiconductor technology, bipolar emitter-coupled logic (ECL) in the CPU, metal–oxide–semiconductor (MOS) in main memory, and ultra high speed bipolar components for the cache memory.

=Processor= The 32-bit CPU contains 16 general purpose registers, eight floating point registers, eight scratchpad and control registers, and consists of four logical, independent units. The instruction unit implements an instruction pipeline with fetch, decode, execute, memory and register access stages and coordinates with other units. The execution unit performs the arithmetic and logical instructions, the storage unit controls high-speed buffer and main memory requests, the channel unit I/O requests. The CPU archives 3.5 MIPS.

=Chess Programs=
 * Awit / Wita
 * Bobby
 * CHAOS
 * Chute
 * Duchess
 * L'Excentrique
 * Tech 3

=See also=
 * Amdahl 5860
 * IBM 370

=Publications=
 * Allan R. Emery, Michael T. Alexander (1975). A Performance Comparison of the Amdahl 470V/6 and the IBM 370/168. Computer Measurement Group, October 1975, San Francisco, California, pdf » AMDAHL 470, IBM 370
 * Alexis J. Pittman (1975). The Amdahl 470v/6: The Latest in Computer Technology. Michigan Technic, Vol. XCIV, No. 2, November 1975

=External Links=
 * Copycats & Competitors from The Computer History Museum
 * Amdahl Computers brochure
 * Amdahl 470V/6 Computer - Multi-Chip Carrier
 * Amdahl 470V/6 Computer - CPU


 * Amdahl - Vintage Computer Chip Collectibles, Memorabilia & Jewelry
 * Amdahl Corporation from Wikipedia
 * Dr. Gene Amdahl with Amdahl 470V/6 from The Computer History Museum
 * Gene Amdahl from Wikipedia
 * Amdahl's law from Wikipedia
 * Amdahl 470 Systems - Summary (pdf)
 * Amdahl 470 Systems (March 1980) (pdf)
 * Amdahl 470 V6 für Oberpfaffenhofen, October 08, 1976, Computerwoche (German) » TR 440

=References=

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