>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>On Behalf Of toftat@cowshed.8m.com
>Sent: 18 October 2004 17:40
>To: piclist@mit.edu
>Subject: Re: [PIC]Stepping through buffer in assembler?
>
>
>> One advntage of FSR is that it is 8 bits so you can 
>indirectly address 
>> up to 256 bytes (in)directly, while you can only access 128 bytes 
>> directly without switching banks. That's why sometimes I'll do code 
>> like:
>
>So you can avoid (some of the banking) issues by using FSR? 
>Please say it is so as I have a buffer copy routine to write 
>and only a limited number of cycles to write it in (copy the 
>buffer between 19.2kBaud characters) this would help 
>eliminate two instruction bank switching.

Because the FSR is 8 bits wide, you can access two banks without having to
set any extra bits.  On some PIC's this will be the entire memory, on others
you will have access to two banks at a time, selected by the IRP bit.

Regards

Mike

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