Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!n8emr!cmhgate!f54.n382.z1.FIDONET.ORG!Chris.Parson From: Chris.Parson@f54.n382.z1.FIDONET.ORG (Chris Parson) Newsgroups: comp.sys.mac Subject: re: Why supervisor mode??? Message-ID: <29449.255E4042@cmhgate.FIDONET.ORG> Date: 11 Nov 89 12:54:01 GMT Sender: ufgate@cmhgate.FIDONET.ORG (newsout1.26) Organization: FidoNet node 1:382/54 - The Bull Creek BBS, Austin TX Lines: 13 This is just speculation, but when the Mac was designed the concept was "computing appliance". They wanted something that would be about the computer equivalent of a toaster to operate. So they neglected to support hard disks ( no HFS ), provided no expansion capability, and gave programrs access to the entire instruction set, since they would never need the supervisor mode to do multitasking! Things have changed! -- Chris Parson via cmhGate - Net 226 fido<=>uucp gateway Col, OH UUCP: ...!osu-cis!n8emr!cmhgate!382!54!Chris.Parson INET: Chris.Parson@f54.n382.z1.FIDONET.ORG