So, if I tried to access an sfr with this:

Movwf   80h

And left off the ,0 then it would probably end up in the wrong place.

Can I use this:

Movwf   0f80h

And not have to worry about the 'a' parameter?
=20

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Bob Ammerman
Sent: Friday, July 09, 2004 12:22 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC:] 18F2220 'a' parameter

It depends on the address of 'register1'.

If register 1 is in the access bank (ie: 0..7F or F80..FFF) then the
assembler automatically uses access bank mode.

Otherwise, the assembler assumes you have been smart enough to set up
the bank register properly, and it uses regular mode.



FYI: I often use the following scheme for allocating memory on 18F
applications:

I set BSR to 1 and leave it there.

Now I can access data in the access bank, as well as bank 1 with normal
instructions without having to play with banking at all.

I use the remaining banks to store buffers and other large data
structures that I access via the FSRs or sometimes MOVFF instructions
(which don't care about banks).

Bob Ammerman
RAm Systems

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