Xref: utzoo comp.sys.mac.system:6563 comp.sys.mac.apps:6462 Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!ucbvax!mtxinu!taniwha!paul From: paul@taniwha.UUCP (Paul Campbell) Newsgroups: comp.sys.mac.system,comp.sys.mac.apps Subject: Re: MY System 7 compatibility (Silverlining) Message-ID: <855@taniwha.UUCP> Date: 29 May 91 17:48:43 GMT References: <1991May20.145224.29042@viewlogic.com> <42593@cup.portal.com> <42708@cup.portal.com> Reply-To: paul@taniwha.UUCP (Paul Campbell) Organization: Taniwha Systems Design, Oakland Lines: 31 In article <42708@cup.portal.com> MacUserLabs@cup.portal.com (Stephan - Somogyi) writes: >Patrick.Hayes@cediag.bull.fr (Patrick Hayes) writes: > >To the best of my knowledge this is not true. Silverlining has >supported A/UX for quite some time. 32-Bit cleanliness is a >prerequisite for an A/UX-compatible hd driver. A/UX doesn't use the drivers off the disk, it has it's own generic SCSI driver (because it has to be able to do disconnect reconnects etc etc) What Silverlining does provide is the ability to create A/UX partitioned disks In other words working with A/UX has nothing to do with 32-bit cleanliness (at least as far as disk drivers are concerned). I think that the main reason why disk drivers fail under 7.0 is not usually because of not being 32-bit clean but instead because in order for a driver to work under VM it must be reentrant (for example: if you start doing a write to disk the driver might take a page fault and be called halfway through the write to read in the data from the paging file that has to be written out). Paul -- Paul Campbell UUCP: ..!mtxinu!taniwha!paul AppleLink: CAMPBELL.P My son is now 2 months old, in that time he has doubled his weight, if he does this every 2 months for the next year he will weigh over 300lbs.