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From: cyliao@eng.umd.edu (Chun-Yao Liao)
Newsgroups: comp.sys.apple2
Subject: Re: Apple // series speedup
Message-ID: <1990May5.020705.15241@eng.umd.edu>
Date: 5 May 90 02:07:05 GMT
References: <24029@unix.cis.pitt.edu>
Sender: news@eng.umd.edu (The News System)
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Organization: College of Engineering, Maryversity of Uniland, College Park
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In article <24029@unix.cis.pitt.edu> fmgst@unix.cis.pitt.edu (Filip Gieszczykiewicz) writes:
>
>	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?

A Ha! This sounds just like the way Zip Chip works... correct me if I'm 
wrong. (well, ZipChip doens' work exactly the way described above, but it
copies whatever it needs into one of it's 8K cache memory and write back
to main memory whenever requires.)

--
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      @epsl.umd.edu		o people: We put main flame power on two guys.
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 xxxxx@xxxxx.xxx.xxx (reserved)	o RC + Apple // + Classic Music + NeXT = cyliao