[Avila] Programming JTAG from Linux and tweaking Redboot

[Tim Harvey]

This has been discussed here in the past (look through the archives for possibly more info)

Personally for JTAG I use a personalized VMWare Virtual Machine (using the free VMWare player) that boots FREEDos with a PXE network stack and leaves me with a DOS cmdprompt with a drive mapped to a network share where I get my images from.  This may be a little complicated to setup but the gist of it is that you can use FLASH.EXE just fine with a paralell port over VMWare if its the whole DOS floppy disk thing that bothers you.  Keep in mind its realy slow so I only use this as a failsafe on a board I rendered unbootable.

Otherwise to update redboot I use the same method I would use to update any other portion of flash - boot the board to a linux kernel and use netflash.  If you conifgure your kernel right, you'll have block/char devices for each flash partition including the bootloader.  Also keep in mind that the binary image you would flash in via this method is NOT the byte-swapped image you would feed to FLASH.EXE.

Tim

----- Original Message ----
From: gw at lunstad.com
To: Avila <avila at lists.unixstudios.net>
Sent: Wednesday, June 28, 2006 8:26:33 AM
Subject: [Avila] Programming JTAG from Linux  and tweaking Redboot
Subject: [Avila] Hi Folks,

I am beginning to tweak redboot on our 2348 and was wondering if anyone
had found a work-around to creating a DOS floppy and running FLASH.EXE
from it to program the flash. Failing that, is it possible to test a
redboot image from RAM (e.g. load the image and then exec it)?

Thanks in advance,

Andrew

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