Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!hsdndev!wuarchive!sdd.hp.com!zaphod.mps.ohio-state.edu!julius.cs.uiuc.edu!apple!vsi1!zorch!mykes From: mykes@zorch.SF-Bay.ORG (Mike Schwartz) Newsgroups: comp.sys.amiga.programmer Subject: Re: What does "trashing low memory vectors" mean? Keywords: CED, GOMF, vectors. Message-ID: <1991Jan11.074437.16594@zorch.SF-Bay.ORG> Date: 11 Jan 91 07:44:37 GMT References: Organization: SF-Bay Public-Access Unix Lines: 31 In article yorkw@stable.ecn.purdue.edu (Willis F York) writes: >Well just for the FUN of it i turned on GOMF's Lowmemory vector checking. >(DW was complaing about these vectors to, as wellas a nother anti-virus prog) > >and it seems EVERY time CED opens a File requestor, a Vector gets "trashed" > >the vector is 00000078, and it gets a value of 00c6f018, >What does this mean? What's a Low-memory-vector? > >C-ya.. > >-- >yorkw@ecn.purdue.edu Willis F York >---------------------------------------------- >Macintosh... Proof that a Person can use a Computer all day and still >not know ANYTHING about computers. Memory location $78 is the Level 6 autovector of the 68000. The first 256 longwords in memory are known as vectors. These vectors typically point at a routine that causes a GURU meditation to happen. The autovectors are the main exception to this rule. The level 6 autovector is used for "external" interrupts according to my Amiga hardware manual, and I can see NO reason why CED should be mucking with it. Perhaps they feel that it is a global longword that is safe to store some important piece of information in, or the developer has some peice of hardware that takes advantage of this vector. I don't know of any hardware that does, thoough, so it may be home-brewed. Whatever it is, it is not a good thing for CED to be doing. This sounds like something you would see on a PC, or in other words, a kludge. Mykes