Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uwm.edu!genbank!apple!well!farren
From: farren@well.UUCP (Mike Farren)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Shadow RAM
Message-ID: <14763@well.UUCP>
Date: 29 Nov 89 17:17:53 GMT
References: <42550@bu-cs.BU.EDU>
Reply-To: farren@well.UUCP (Mike Farren)
Distribution: comp
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 14

In article <42550@bu-cs.BU.EDU> bear@bu-pub.bu.edu (Blair M. Burtan) writes:
>Does anyone think that Shadow RAM would be effective on an Ami?

Probably not, at least not on a "standard" Amiga with a 68000.  The whole
reason for "Shadow RAM" is to allow ROM code to be executed without
requiring wait states to be inserted for memory accesses to system code,
ROM typically being slower than RAM.  But the standard Amiga ROM is fast
enough that no wait states are needed.  A fast 68020 or 68030 would need
wait states, but I understand (not being able to afford such a beast myself)
that there are provisions for "Shadow RAM" type things in fast systems
already.

-- 
Mike Farren 				     farren@well.sf.ca.usa