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DEC PDP-10 : ウィキペディア英語版
PDP-10

The PDP-10 is a discontinued mainframe computer family〔Ceruzzi, p. 208, "It was large—even DEC's own literature called (PDP-10 ) a mainframe."〕 manufactured by Digital Equipment Corporation (DEC) from 1966〔Ceruzzi, p. 139〕 into the 1980s.
The PDP-10 architecture is almost identical to the earlier PDP-6 architecture, sharing the same 36-bit word length and slightly extending the instruction set (but with improved hardware implementation). Some aspects of the instruction set are unusual, most notably the "byte" instructions, which operated on bit fields of any size from 1 to 36 bits inclusive according to the general definition of a byte as ''a contiguous sequence of a fixed number of bits''.
The PDP-10 is the machine that made time-sharing common, and this and other features made it a common fixture in many university computing facilities and research labs during the 1970s, the most notable being Harvard's Aiken Computer Center, MIT's AI Lab and Project MAC, Stanford's SAIL, Computer Center Corporation (CCC), and Carnegie Mellon University. Its main operating systems, TOPS-10 and TENEX, were used to build out the early ARPANET. For these reasons the PDP-10 looms large in early hacker folklore.
Projects to extend the PDP-10 line were eclipsed by the success of the unrelated VAX superminicomputer, and the cancellation of the PDP-10 line was announced in 1983.
==Models and technical evolution==

The original PDP-10 processor is the KA10, introduced in 1968. It uses discrete transistors packaged in DEC's Flip-Chip technology, with backplanes wire wrapped via a semi-automated manufacturing process. Its cycle time is 1 μs and its add time 2.1 μs.〔Digital Equipment Corporation, ''The digital small computer handbook'', p. 376〕 In 1973, the KA10 was replaced by the KI10, which uses TTL SSI. This was joined in 1975 by the higher-performance KL10 (later faster variants), which is built from ECL, microprogrammed, and has cache memory. A smaller, less expensive model, the KS10, was introduced in 1978, using TTL and Am2901 bit-slice components and including the PDP-11 Unibus to connect peripherals.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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