Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!cornell!batcomputer!itsgw!steinmetz!uunet!unisoft!paul
From: paul@unisoft.UUCP (n)
Newsgroups: comp.sys.mac
Subject: Re: NeXT press release (very long but interesting)
Message-ID: <1336@unisoft.UUCP>
Date: 19 Oct 88 16:54:15 GMT
References: <5423@juniper.uucp> <72886@sun.uucp> <635@ardent.UUCP> <10103@cup.portal.com>
Reply-To: paul@unisoft.UUCP (Paul Campbell)
Lines: 33

Just couple of corrections:

In article <10103@cup.portal.com> Mark_Peter_Cookson@cup.portal.com writes:
>NuBus if FULL NuBus (not stripped like the apple version) at a FULL 25 Mhz.
>All of the control for the NuBus is on one big giant chip. (Apple's NuBus
>goes at	barly 10MHz)!

10MHz is the IEEE NuBus standard, there is NO other standard (since TI
owns the rights to the name Steve may not even be able to call it that).
Apple did make some trivial changes (redefined one pin to be an interrupt
line and changed the shape of the cards), mostly to reduce the price of
3rd party cards (helps both you and us card developers). What percentage
of people with Macs are limited by the speed of their NuBus? (Do you know
any?)

Of course this doesn't stop stop Steve from making his own standard ...
and obviously 25MHz is faster than 10MHz - I think he needs this speed
for something else ....

>The memory for the display (which is part of the main board) is	VRAM,
>driven by the video chip, which	means NO CPU cycles go for
>display.

With VRAMs you do have to use some memory bandwidth for row access but
the amount is trivial, I guess that's why they use them in the Mac II memory
cards too.

	Paul
-- 
Paul Campbell, UniSoft Corp. 6121 Hollis, Emeryville, Ca ..ucbvax!unisoft!paul  
Nothing here represents the opinions of UniSoft or its employees (except me)
"Gorbachev is returning to the heritage of the great Lenin" - Ronald Reagan 1988
  (then the Wasington Post attacked RR [from the right] for being a Leninist)