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From: whitewolf@gnh-starport.cts.com (Tae Song)
Newsgroups: comp.sys.apple2
Subject: Re: Apple // series speedup
Message-ID: <9005091436.AA18965@apple.com>
Date: 9 May 90 15:07:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 11
X-Unparsable-Date: Wed May  9 90 at 03:54:22 (EDT)

>        Greetings. Anyone see what some of the high-end IBM
>        386 clones are doing too speed up their machines...
>        (as if they need to...:-) The use SHADOW RAM. Basicly
>        they copy the ROM to high speed STATIC RAM and then
>        switch OUT the ROM and switch IN the RAM... The ROMS
>        are usually 200-300 ns while the STATIC RAMs are
>        25-30 ns... nice. Anyone try it for the Apple...
>        By the way (BTW) this also will work for any computer
>        that has ROMs.... basicly anything... Anyone?

"SHADOW"ing is used on the GS.  Details on shadowing is somewhat fuzzy, though.