Richard B. Johnson wrote:
>
> On Wed, 19 Apr 2000, Anders Larsen wrote:
>
> > Hi,
> >
> > the enclosed benign patch solves two independent problems with the AMD
> > Elan SC400 series of embedded CPUs (a 486 with DRAM controller, 8253,
> > dual 8259, 16550 and EPP on a single chip):
>
> How did you get it to boot? I have the same "demo-board". Linux comes
> up and crashes immediately with an unrecognizable scroll of high-speed
> junk on the screen. Further, the boot-ROM seems to leave the machine
> in virtual-86 mode after a reset so setting the PE bit traps to the
> built-in debugger.
>
> I have to boot DOS, then warm-boot Linux. NotGood(tm)
I'm using a credit-card size module "DIMM-PC EC" from the German company
Gesytec GmbH (http://www.gesytec.de/) which contains an SC410 CPU, a
Crystal CS8900 10Base-T, 4Mb Flash and 8Mb RAM.
A small part of the flash is factory-programmed with a boot-loader
taylored for Windoze CE.
What we did was to adapt the setup-code (bootsect.S and setup.S) to that
loader and hack a utility to pack the bzImage together with an initrd into
the format (M$ WinCE NK.bin) it will understand.
The module can boot from Flash or from the Ethernet (proprietary protocol
of course, but it turned out to be totally, utterly simple, something like
a stripped-down tftp :-).
I have a 2.2.14 (with the patch I submitted) running together with the
libs and utilities from the LEM package (http://www.linux-embedded.org/),
adapted to our special needs.
It's been running stable for more than a week now :-D
Our setup code and boot utilities will be published (GPL) after I've had
a chance to tidy up the code a bit...
Cheers
Anders Larsen
#exclude <windows.h>
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This archive was generated by hypermail 2b29 : Sun Apr 23 2000 - 21:00:17 EST