startup of the bare hardware metal

On Mon, 28 May 2012 12:20:22 -0500, piyushpandey wrote:

>>On Sun, 27 May 2012 06:12:23 -0500, piyushpandey wrote:
>>
[snip]

> So what I think that I must start in right manner rather than asking you
> people that what is this , how it works and many more how after that.
> 
> 
> I think I should give it some time of myself and for that I need to
> study it in very much detail to understand each and every bit of it.
> 
> 
> So as you are very much experienced so would you please help me in
> providing the documents or the links to the sources from where I can
> start of.
> 
> what I want you to tell me is the right direction to approach from
> beginner point of view.
> 
> 
> I hope that you would have got my point chisolm.
> 
> 
> And at last thank you once again for such a beautiful description..:)
> 
> 
> 
> 
> 
> 	   
> --------------------------------------- Posted through
> http://www.EmbeddedRelated.com

I cut my teeth on SDS Sigma systems and doing SDS Sigma 2/3 and
Xerox 530 work.  But booting those systems or any newer cpu is
still the same basic idea.

I would suggest you start with something simple.  The Microchip
PIC18 series are easy to work with.  They come in DIP packages that
make breadboarding easy.  They are not the only option, I just use them
because I have a several tubes left over from a project a few years ago.

I do not know what your resources are for purchasing hardware.  To use
a PIC series you will need a programmer.

Another option is something like a LPC Xpresso development board.
These are just 2 of many options.  Everyone has their favorite.

You need to download data sheets for the processors.  Each processor will
have something in the data sheet about the power on reset (or just reset)
events and what happens.  Read that and understand it.  Then start working
from there.  The LPC Xpresso board IDE comes with several existing
projects you can look at and start to understand how things work and fit
together.  Expand on the examples -- change the clock rates, read and
write to IO pins, etc.

You must be comfortable with how this works before you can progress into
more complicated boot sequences.
Good Luck.

-- 
Chisolm
Republic of Texas