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From: jep@mtiame.mtia.oz (Jesper Peterson)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Amiga Custom Chips - Mem management and resource tracking
Message-ID: <1991Apr4.074540.27750@mtiame.mtia.oz>
Date: 4 Apr 91 07:45:40 GMT
Article-I.D.: mtiame.1991Apr4.074540.27750
References: <1991Apr3.201259.8377@engin.umich.edu> <1991Apr3.153236.1@vf.jsc.nasa.gov> <1991Apr4.034655.3681@uniwa.uwa.oz>
Organization: Metal Trades Industry Association, Victoria, Australia.
Lines: 21

In article <1991Apr4.034655.3681@uniwa.uwa.oz> andreww@uniwa.uwa.oz (Andrew John Williams) writes:
|Something I've always wanted to know - if the problem of no MMU in the
|Amiga is because the messages need shared memory, why not make just that
|little bit of memory common to any tasks that want it. The rest can be
|protected. Add some new calls (or flags) to the OS for requesting
|protected memory or message memory. The old software can call the old

You mean like (c.f.: exec/memory.h):

	ptr = AllocMem( size, MEMF_PUBLIC );

Of course this flag has been widely misused and any fixed amount of
public memory would probably disappear when you start the first
application. Any new flag would mean old programs would never get
any public memory. I *do* hope this will be resolved one day.

Jesper.
-- 
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