bootloader that xfers code from I2C into program memory

[picster]

Without getting into the EXT modifier,

Yes, I agree - BLOCK_SIZE is a constant, but still treated "like" a variable when passed from one side to the other in this manner. The point here being, it will change and be assigned the value according to the INCLUDE file for the PIC.

So if I just do:

BlockSize VAR BYTE BANKA

in both the bootloader and the main program, will they both allocate to the same RAM location automatically? I know they'll do the same BANK, but the same actual location? Wouldn't I need to specify the same location in BANKA for both to ensure I'm grabbing the same byte from RAM?

I'm really not so concerned about doing it with BLOCK_SIZE because it IS a constant that I can just declare in my bootloader as 32 - but I'm thinking about other variables that might come in handy to "pass" from the lower program to higher program.