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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.mac.programmer,comp.sys.mac.misc
Subject: Re: ROM in RAM
Message-ID: <1990Oct31.202941.14811@eng.umd.edu>
Date: 31 Oct 90 20:29:41 GMT
References: <1990Oct31.032509.265@bushido.uucp>
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In article <1990Oct31.032509.265@bushido.uucp> kr1@bushido (kahlil rowter) writes:
>I have been using MacMeter for a while now. I've noticed that my SE/30 
>typically spends 50-70% of the time on ROM accesses (no surprise here
>right?). So I thought of the ability of 386 (DOS) machines to load its
>ROM in RAM thereby cutting down access time and improving overall thruput.
>Now comes the hard question: Has there been attempts to load the Mac ROM
>onto RAM? If not, why?

Theoretically, RAM could be mapped into ROM space using the PMMU built into
the 030-- I don't know if you would gain any access time, and you would lose
a few pages of RAM.
--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
Tax the rich, and feed the poor -- until there are, rich no more.