Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!elroy!brad From: brad@gobi.jpl.nasa.gov (Brad Pickering) Newsgroups: comp.sys.mac.programmer Subject: System Startup Message-ID: Date: 9 Apr 91 22:21:03 GMT Sender: news@elroy.jpl.nasa.gov (Usenet) Distribution: comp Organization: Jet Propulsion Laboratory, Pasadena, CA Lines: 46 Nntp-Posting-Host: ais-gw.jpl.nasa.gov IM Vol V, in the Start Manager chapter, describes the information on a volume used during system startup, but there seems to be alot of information missing here. I am most interested in what is needed to create a disk that will execute some code from these boot blocks. My questions are: What is the 'system startup information ID'? I have seen $4c4e (or something like that) for regular startup disks but I was wondering if there were other values that meant other things. What is the format of the 'entry point of boot code'? Is this some sort of absolute address in memory, or on disk? Or is this address relative to some disk address? Any information would be appreciated. An example would be most appreciated? I tried something like: $0 $4c4c $2 $0000008a /* address relative to start of disk of boot code */ $6 $0044 $8 $0000 $A '' $1A '' $2A '' $3a '' $4a '' $5a '' $6a '' $7a $0000 $7c $0000 $7e $00000000 $82 $00000000 $86 $00000000 $8a @1 bra.s @1 I thought this should send the machine into a loop but it just spit the disk out and rebooted or crashed. thank, Brad Pickering -- -- Brad Pickering brad@gobi.jpl.nasa.gov --