How do I specify certain addresses to not be banked?

Greetings. This is my first post - so please be patient as I learn the 
ropes. Thanks!

I'm working with an 18f1220.

I wish to use bank 1 for my main code, and bank 2 for my low priority 
ISR so they can have each plenty of non-shared ram.

And I wish to use the first half of bank 0 as "global" vars in the same 
way that the second half (the SFRs) are "global."

Let me explain:

PORTA, for example, is defined as:
PORTA           EQU  H'0F80'

Let's say I then do a:
CLRF PORTB
the assembler (gpasm-0.13.4 beta) does (and should) clear the access bit 
so the CLRF will always operate on 0x80 in bank zero.

Thus, no matter what bank is currently set in BSR, a CLRF on PORTA will 
always hit bank 0...

So, here is the question: How can I make some of my own ram locations 
also always be accessed in bank 0 without me having to specify the ",0" 
on every file instruction?

For example, if I do:

MyGlobalByte   EQU   0xF01

As it is, the assembler just drops the F00 part and a CLRF on 
MyGlobalByte will clear byte 1 in the currently selected bank. Why can't 
the assembler see that I've specified 0xF01 and automatically clear the 
use-bank-selected bit - Just like it does for addresses above 0xF80?

That way, whenever I do an operation on MyGlobalByte, it would always 
(without me having to specify ",0") access 0x01 in bank 0.

Surely I can go change some line in some file to make it do that task 
for the range of 0xF00-0xFFF since it already does it for 0xF80-0xFFF.

Thank you very much,

-Jesse