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Re: Redboot from DiskOnChip trouble


On Sun, Jan 23, 2005 at 07:07:07PM +0100, Rob van der Ouderaa wrote:
> Hi,
> 
> I am having trouble to get the RedBoot loader to work
> from DiskOnChip. On my i386 target, a TS-5300, I dumped
> the redboot.bin file into the b: diskonchip device.
> After rebooting the target on the b: device I get the dots
> from redboot but after that the target does not show a 'Redboot>' prompt.
> 
> I also tried the DiskOnChip patch on the v2_0 version of Ecos.
> CYG_HAL_STARTUP_DISK was set, no joy either, same result.
> 
> I need DiskOnChip startup since there is no floppy device on my target.
> Is there a way to debug the redboot program in this early booting stage ?

Do you have any means to debug? JTAG, another boot loader etc?

What people normally do is uses an existing boot loader to load a and
debug a RedBoot RAM image. Once that works well you can then go back
and get a RedBoot ROM image booting.

How many dots do you get? There should be one per sector. Is there
enough to suggest the whole image is being read in?

Do you have CYGINT_HAL_I386_PCMB_SCREEN_SUPPORT enabled. Without this
you won't see anything on the screen from Redboot, it will only use
the serial ports. Is there anything on the serial ports?

        Andrew

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