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RE: Single chip intel based computers

> ----------
> From: 	Vaughan Pratt[SMTP:]
> Sent: 	Monday, November 30, 1998 11:42 PM
> To: 	Wear hard
> Subject: 	Re: Single chip intel based computers 
> 
> 
> From: John Flanagan <>
> >1) A very important consideration for full-fledged CPUs is the number of
> >pins available.  Every feature that you tack onto the chip is more pins
> >that have to come out of the package.  This causes more problems than
> you'd
> >think.
> 
> That's not clear.  If you put inside the chip everything that you want
> to put on the main bus (ISA, PCI, Nu, ...), you would eliminate a *lot*
> of pins by not having to bring the bus out.
> 
Actually I think it would increase pins, remember you have the Hard disk,
Sound, Floppy, Keyboard, up to four serial ports, and video.
And depending on whether memory was in or out of the CPU, you may not lose
your original bus lines. 

> >3) Concentration of heat.  All that stuff you throw onto that single chip
> >will be producing heat in one place, rather than being scattered around.
> >This will aggravate heat problems.
> 
> Again not clear.  One heat sink on one multipurpose chip can spread the
> heat around better than no heat sinks on 3-4 chips, and just as well as
> having a heat sink on each of those chips assuming same total area of
> heat sink.  And in any event you eventually have to get the heat out of
> the case, regardless of whether it originates from one chip or several.
> 
May or not be the case, I would still feel more safe with the heat spread
around rather than packed all together

> Vaughan
> 
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