Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!iuvax!uxc!uxc.cso.uiuc.edu!zaphod!redman
From: redman@zaphod.ncsa.uiuc.edu
Newsgroups: comp.sys.mac
Subject: Re: Apple HD80SC... Quantum ???
Message-ID: <600011@zaphod>
Date: 1 Feb 89 16:38:00 GMT
References: <19105@agate.BERKELEY.EDU>
Lines: 10
Nf-ID: #R:agate.BERKELEY.EDU:19105:zaphod:600011:000:489
Nf-From: zaphod.ncsa.uiuc.edu!redman    Feb  1 10:38:00 1989


There is at least one difference that I am aware of. Apple added an interupt
for each card to the NuBus. The reason that this was done was so that simple
cards, not capable of becoming bus master, can generate an interupt to the
host indicating a need for service. This eleminates the need for a card to
become bus master in order to initiate a data transfer over the NuBus.

Fairly reasonable, in my opinion.

Certainly Apple is pushing to make their implementation of NuBus a standard.