Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!ohstpy!miavx1!miavx2!maoursler From: maoursler@miavx0.ham.muohio.edu Newsgroups: comp.lang.pascal Subject: INT 25 & 26 under DOS 4.01 Message-ID: <219.26c03934@miavx0.ham.muohio.edu> Date: 8 Aug 90 20:09:24 GMT Organization: Miami University, Hamilton campus Lines: 18 Hiya, I hope someone out there can help me. I am trying to modify a program I wrote before. The program reads and writes information to the boot sector. No problem. Works just fine. However... Now I need to read and write from a hard disk under DOS 4.01 with a partition > 32MB. I have the info on 'how' to do it. I know I am supposed to alter the way INT 25 and 26 work by using a control block structure. Problem is, it doesn't work. I obviously am messing this up. If anyone out there has examples of how to do this, I would really love to see them. Thanks in advance. - Miles - Replies to this newsgroup please.