Re: What is a vector file?

[Home Email <home_email2000 at yahoo dot com>]

In the last five hours since I wrote this I have done
nothing read, read, read GNU AS,LD and Hitachi manual.
 I understand now what is going on and how this is
working.  It's slowly coming together for me.

Thanks for your response.

R.F.


--- Keith Wright <kwright@gis.net> wrote:
> > From: Home Email <home_email2000@yahoo.com>
> > 
> > In studying a boot prom for an Hitachi SH032 along
> > with the source code, I am beginning to get a good
> > understanding of how the GNU AS, LD works.
> However,
> > when I read in the boot prom I have into my
> programmer
> > I find locations 0x0000 - 0x01C7 filled with
> various
> > hex numbers that I don't know what they are.
> 
> Clearly, you are out of your depth, but you may be
> swimming in a minute.  You need to learn about the
> hardware you are running on.  Go to Hitachi and ask
> for the SH032 "Principles of Operation",
> "Programmer's
> Reference", or "Instruction Set List".  I don't
> know what it's called by Hitachi, and I don't have
> it,
> so don't ask me more about that.  Some general book
> on programming microprocessors may also be helpful.
> 
> > FILE NAME:
> >   Vectors.S
> > FUNCTION:
> >   This file contains the vector overlay for the
> >   SH7000  microcontroller.
> 
> ... so on.  Much more than we need to see of the
> interrupt vector table.  Go learn what an interrupt
> vector table is, the comment says all that could be
> said, you need to learn the language it is written
> in.
> 
> > I am but just a learner here so bear with me while
> I
> > ask some dumb questions.....
> 
> I'm being as polite as I can, given my abrasive
> personality.
> 
> > It looks as though as soon as the microcontroller
> > begins it is initalizing itself.  Is this what the
> > vector file is for?
> 
> Its a list of addresses to jump to when an interrupt
> happens.  Different addresses for different
> interrupts.
> One interrupt is Power-on and Reset.
> 
> > Do all embedded microcontrollers use a file like
> this
> > at the beginning of their their boot prom
> 
> You could imagine doing it in other ways, but
> _every_
> boot prom does it somehow, whether it is embeded in
> a can opener or largest Supercomputer of the week.
> 
> > and how much intialization is necessary?
> 
> See processor reference and motherboard schematic.
> 
> > Is there any documentation about vector files and
> how
> > to use them (or other methods)?
> 
> CS 201, Undergraduate Intro to Computer
> Architecture.
> 
> > Thanks for any help on this.
> 
> De nada.
> 
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