[ECOS] Re: MIPS Evalution board boot ROM

[Jonathan Larmour <jlarmour at redhat dot co dot uk>]

Ling Su wrote:
> 
> Hi,
> 
> I remembered that I have to burn a CygMon ROM to debug eCos on the MIPS
> evaluation board. I just find the /ecos/loaders/vr4300-4373/stubrom.bin and
> stubrom.img, is that the CygMON mentioned before? Currently my board is
> configured by a PMON boot ROM, if I replace it, how could I find the manual
> for the CygMON, otherwise, I am not sure how could I go ahead to try it.

The Vr4300 port does not support CygMon - some of our ports do, but this
one doesn't. The stubrom.bin image is actually a simple GDB stub ROM and
nothing more. It allows you to download and debug programs using GDB; but
that's all you really need it to do!

I can't remember whether the VRC4373 board uses a PROM or FLASH, but just
in case, I strongly recommend you program a separate ROM/FLASH module with
the GDB stub ROM image, rather than overwriting the contents of the PMON
ROM/FLASH module. It is worth keeping the PMON ROM safe.

Jifl
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