TOMIII@MTUS5.BITNET (Thomas Dwyer III) (07/27/90)
Does anyone know of a method do boot PC-NFS off a ROM? Suppose we write our own PROM to download a bootdisk image into memory. How would we then get the PC to use this disk image instead of the A: drive? Or suppose we steal INT 13 and just feed the BIOS our own bootstrap code when it tries to read the boot sector. This code would then download IBMBIO.COM and run it, but then how do we feed it IBMDOS.COM, etc? Any comments/suggestions/etc? Thanks, Thomas Dwyer III TOMIII @ MTUS5.BITNET Network Programmer DWYERIII @ MTUS5.BITNET Computing Technology Services Michigan Technological University
angelini@irisa.fr (Pierre Antoine Angelini) (07/27/90)
In article <90207.161845TOMIII@MTUS5.BITNET> TOMIII@MTUS5.BITNET (Thomas Dwyer III) writes: >Does anyone know of a method do boot PC-NFS off a ROM? Suppose we write >our own PROM to download a bootdisk image into memory. How would we then >get the PC to use this disk image instead of the A: drive? Or suppose >we steal INT 13 and just feed the BIOS our own bootstrap code when it >tries to read the boot sector. This code would then download IBMBIO.COM >and run it, but then how do we feed it IBMDOS.COM, etc? > >Any comments/suggestions/etc? > This has been made by: Schasiepen(ratingen) Address: Carl Schasiepen Gmbh Harkorsts 25 Postfach 22 60 4030 Ratingen 1 Tiefenbroich Germany Tel 49 2102 49 06 0 They use a 3C503 or WD8003EBT I didn't order it, so I can't give any other impressions about that product. It works with Bootp and Tftp, loads an image of the PC system, etc... -------------------------------------------------------------------------------- Pierre Antoine ANGELINI (PAA) || E-MAIL : angelini@irisa.fr IFSIC /IRISA Atelier Micro Universite de Rennes I Campus de beaulieu 35042 RENNES CEDEX - FRANCE --------------------------------------------------------------------------------
milton@ecn.purdue.edu (Milton D Miller) (07/30/90)
In article <90207.161845TOMIII@MTUS5.BITNET> TOMIII@MTUS5.BITNET (Thomas Dwyer III) writes: >Does anyone know of a method do boot PC-NFS off a ROM? Suppose we write >our own PROM to download a bootdisk image into memory. How would we then >get the PC to use this disk image instead of the A: drive? Or suppose >we steal INT 13 and just feed the BIOS our own bootstrap code when it >tries to read the boot sector. This code would then download IBMBIO.COM >and run it, but then how do we feed it IBMDOS.COM, etc? > >Any comments/suggestions/etc? > Rather then catching INT13, why not start with INT 19, the boot interrupt? (The ROM routine for INT19 tries the disk, and is intercepted by the hard disk controller rom to enable booting from the hard disk). I haven't looked into this in too much detail, so I can't tell you how to load IBMDOS after you give it IBMBIO, mabye you could do a combined image? milton