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VAX 4000 The VAX 4000 was a family of low-end minicomputers developed and manufactured by Digital Equipment Corporation (DEC) using microprocessors implementing the VAX instruction set architecture (ISA). The VAX 4000 succeeded the MicroVAX family. It was the last family of low-end VAX systems, as the platform was discontinued by Compaq. == VAX 4000 Model 300 ==
The VAX 4000 Model 300, code-named "''Pele''", was introduced on 9 July 1990 at DECworld in Boston, Massachusetts, replacing the MicroVAX 3800 and 3900.〔Markoff "Digital Finally Follows a Trend"〕〔"DEC PACKS VAX 4000 WITH SUPPORT RISCS TO OUTDO IBM AS/400"〕 It used the time-sharing KA670-AA CPU module containing a 35.71 MHz (28 ns cycle time) Rigel chip set with a 128 KB external secondary cache protected by ECC built from 84 ns SRAM. It supported one to four MS670-BA (32 MB) or MS670-CA (64 MB) memory modules for 32 to 256 MB of memory. Q-bus was used for expansion. The Model 300 could be upgraded to a Model 400, Model 500 or Model 600 by replacing the backplane, CPU and memory module(s).
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「VAX 4000」の詳細全文を読む
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