Re: Another New Hardware Thought

["Jeff Blakeney" <jeff.blakeney@a2central.com.remove-zvw-this>]

  To: mdj
On Wed, 2 May 2007 19:29:31 -0700, mdj wrote:

> A curious idea, but you really need an OS to support it.
> 
> MMU's really only become useful when you're running more code than
> you've got RAM, facilitating virtual memory. There aren't really any
> practical applications that such small machines can run that require
> that amount of addressable space.

Don't MMU's also keep tasks from writing into the memory area of other
tasks?  Personally, I usually find virtual memory a performance hit to
my machine that I don't much like, although it does let me run programs
that I don't have enough physical memory for albeit slowly.

In the case of an Apple IIgs MMU, having hardware memory protection to
keep tasks from walking on each other and to inform the developer or
user of what is happening would be fantastic.
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