RE: [Tinyos-help] RE: Welcome to the "Tinyos-help" mailing list (Digest mode)

Thu, 18 May 2006 20:09:11 -0700

Hi Aditya,
 
 I have even seen the code from where the board or the processor starts exceuting its very first instruction when i was debugging the code,,,,,,,,,,
it starts from the  0th address but due to aliasing it then refers to the base address of the prom to which u would have burnt the code ...right....?
I am talking about the bootprom code.....
 
 
then u copy the code from the prom to the ram..u have lot data structures....and then i agree with u its just the index ,which gets u the pointer to the funcion ....
which gets executed....:))

From: Aditya Bhave [mailto:[EMAIL PROTECTED]
Sent: Thursday, May 18, 2006 7:35 PM
To: Pradeep T Ramakrishna (WT01 - Broadband Networks)
Cc: tinyos-help@millennium.berkeley.edu
Subject: Re: [Tinyos-help] RE: Welcome to the "Tinyos-help" mailing list (Digest mode)

I do not think the JUMP or BRANCH instructuon is actually stored in the interrupt vector table. It would be redundant information.  Basically the interrupt vector number is used as an index into the interrupt vector table (IVT). The entry at that index will give the 32 bit address to jump to to execute the interrupt service routine. Where have you read that the instruction is also stored in the IVT?

On 5/18/06, [EMAIL PROTECTED] <[EMAIL PROTECTED] > wrote:

Hi ,
In the reset vector address we place the instruction branch or jump and
even the address to where we have to jump or branch but the address
itself is 32 bits...?

How is it that we are able to accommodate the 32 bits address and even
the instruction in the 32 bits space....


Thanks and Regards,
Pradeep


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--
regards,
Aditya Bhave

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