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-Subject: Look Mom, no PROM burner! (eepro100b flashing instructions) :-)
-Date: Sun, 23 Jan 2000 01:53:08 -0500
-x-sender: mdc%thinguin.org@cdi.entity.com
-x-mailer: Claris Emailer 2.0v3, January 22, 1998
-From: Marty Connor <mdc@thinguin.org>
-To: "Netboot List" <netboot@baghira.han.de>
-Mime-Version: 1.0
-Content-Type: text/plain; charset="US-ASCII"
-Message-ID: <1263512144-341319205@entity.com>
-
-Continuing the Etherboot World Domination theme, I noticed that there was
-a PCI ethernet card on my bookshelf that still contained the original
-vendor's code in its flash memory. The card virtually cried out to be
-flashed with Etherboot 4.4.1. :-)
-
-After having figured out how to flash the 3C905C last week, and owing to
-the fact that the temperature here in Cambridge, Massachusetts (USA) has
-dropped well below freezing, I decided to explore the possibility of
-flashing the Intel eepro100b that was sitting on my bookcase.
-
-After determining that it was unlikely that one could flash the chip in
-user mode under linux like the 3C509C, I turned to other options. (the
-reason is that the flash is memory mapped to a place that causes a core
-dump if accessed. i suppose one could to patch the kernel to flash the
-card, or add a linux device driver, but... :-)
-
-By the way, If you are ever looking for Linux utilities for Ethernet
-cards, you may want to check out:
-
- http://cesdis.gsfc.nasa.gov/linux/diag/
-
-which is a treasure trove of tools for manipulating and testing Ethernet
-cards, all with source, courtesy of Donald Becker.
-
-At this point, I felt it was time to make a virtual trip to the Intel
-site (http://www.intel.com/), and search for utilities that might work
-with the eepro100B. I found two candidates: FUTIL and FBOOT. I
-downloaded, decompressed, and transferred them to a DOS formatted floppy.
-Next I determined (after a few tries) that F8 will let me get to DOS
-instead of booting windows. (I tend to avoid Windows when I can).
-
-I first tried FUTIL.EXE. No good. It told me it didn't recognize the
-flash on my eepro100B. how unfortunate. and I had such hopes :-)
-
-Next I tested FBOOT.EXE (available at
-http://support.intel.com/support/network/adapter/pro100/100PBOOT.htm)
-This program did in fact recognize my eepro100b card.
-
-The thing about FBOOT however, is that it thinks it only can load certain
-files. I of course needed to load an Etherboot image. It appeared to
-have no option for doing that. Things looked grim.
-
-Then I noticed that FBOOT was kind enough to do the following dialog:
-
- Select Option (U)pdate or (R)estore: U
-
-I chose Update and it then offered to back up my flash rom for later
-restore:
-
- Create Restore Image (Y)es or (N)o: Y
-
-I chose "Y" and it proceeded to write a file of my flash memory, which
-contained the Intel code.
-
- Writing FLASH image to file... 100%
-
-It then erased the device:
-
- Erasing FLASH Device... 100%
-
-and then programmed it with fresh code (stored inside the program, no
-doubt):
-
- Programming FLASH Device... 100%
-
-So now I had a backup of the Intel boot code in a file strangely called:
-
- 2794FC60.FLS
-
-Hmmmm, interesting name. The MAC address of the card is 09902794FC60.
-They just name the file with the last 4 octets of the MAC address and
-.FLS. The file is exactly 65536 bytes, which would make sense for a 64K
-Flash Memory device.
-
-Then I got to thinking, I wonder how carefully the "restore" part of
-FBOOT looks at what it is loading? What if I took an Etherboot .rom
-file, padded it with 48K of 0xFFs and named it 2794FC60.FLS. What if I
-then told FBOOT.EXE to "restore" that?
-
-Well, I guess by now, you know it worked :-)
-
-The card came up with the delightful Etherboot banner, Did DHCP, tftp,
-and started a kernel.
-
-The only unfortunate part is that you need to do this under DOS because
-you seem to need to be in real mode to program the card. Oh well,
-sacrifices have to be made :-)
-
-So, in summary, to prepare Etherboot image for flashing into the Intel
-EEPRO100B card with FBOOT, you need to first make an eepro100.rom file,
-as usual.
-
-Then, see how large it is, with an "ls -l eepro100.rom". the answer will
-probably be 16,384. You need to pad it with hex FFs to make it 64K for
-FBOOT. I used the following two lines to create the flash image file.
-
- $ perl -e 'print "\xFF" x 49152' > 48kpad.bin
- $ cat eepro100.rom 48kpad.bin > 2794FC60.FLS
-
-Next write it to a DOS Floppy:
-
- $ mount -t msdos /dev/fd0 /mnt/floppy
- $ cp 2794FC60.FLS /mnt/floppy
- $ umount /mnt/floppy
-
-Now you need to get to DOS. You could actually use a bootable DOS floppy
-with FBOOT.EXE and 2794FC60.FLS on it. I started a Windows box and hit
-F8 right before Windows started, and chose option 5, "Command Prompt
-Only", which gives you DOS. This program can't run in a DOS window under
-Windows or anything like that. You need to be in real DOS.
-
-Next it's time to run FBOOT. It will detect your ethernet card(s), ask
-you which one you want to program, and let you choose it from a menu.
-
-now the fun part:
-
- Select Option (U)pdate or (R)estore: R
- Erasing FLASH Device... 100%
- Writing FLASH image from file... 100%
-
-Time to reboot and let Etherboot take over.
-
-So there you go, a way to make Intel EEPRO100Bs play nicely with
-Etherboot. Maybe we should put these instructions in the Etherboot
-contrib directory so people who have eepro100b cards will be able to
-avoid 3C905C envy :-)
-
-I hope this helps a few people out.
-
-Regards,
-
-Marty
-
----
- Name: Martin D. Connor
-US Mail: Entity Cyber, Inc.; P.O. Box 391827; Cambridge, MA 02139; USA
- Voice: (617) 491-6935, Fax: (617) 491-7046
- Email: mdc@thinguin.org
- Web: http://www.thinguin.org/