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Conference noted::ibmpc-95

Title:IBM PCs, clones, DOS, etc.
Notice:Intro in 1-11, Windows stuff in NOTED::MSWINDOWS please
Moderator:TARKIN::LINND
Created:Tue Jan 03 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3023
Total number of notes:28404

2928.0. "Info. and queries about LPv cache upgrade" by PGREEN::HAYESI (Is that a warp nacelle in your pocket...?) Mon Feb 24 1997 07:25

    I am looking to upgrade my some years old LPv system by adding in a L2
    cache. It currently doesn't have any.
    
    I have researched this and discovered that to upgrade it I need DEC
    part numbers:
    PC75M-BA	(0 - 128K)
    PC74M-BA	(128 - 256K)
    
    More specifically, the chips I need are dual in line SRAMs in the
    following quantities:
    3 off 16K x 4 15ns
    8 off 32K x 8 20ns
    
    My queries are:
    
    1) Can I simply buy these chips from a supplier or do I need to have
    specific chip part numbers?
    2) Living around the Reading area in UK, where could I buy them from? 
    3) Are these parts still available from Digital and if so where could I
    order them from?
    4) Are there any undocumented restrictions vis-a-vis putting this
    upgrade into my system?
    
    Thanks in advance,
    Ian.
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