Just by adding "#pragma udata access accessram", and "near" to the 3 
arrays did the job so far. I still have some code commented out, but 
seems to be working. Thanks so much :) I'll have to review what didn't 
work to understand why this does work. :)

Scott wrote:
>
> Carl,
>
> The relevant parts of the linker script are:
>
> ACCESSBANK NAME=accessram  START=0x0               END=0x7F
> DATABANK   NAME=gpr0       START=0x80              END=0xFF
> ACCESSBANK NAME=accesssfr  START=0xF80             END=0xFFF
>
>
> Generally, variables that you access often are put in ACCESS RAM because
> it's faster (no bank switching). Temporary math variables are placed here
>
> The C stack is generally put at high part of RAM (since there's not much RAM
> in this chip, the stack is placed somewhere in gpr0, the highest bank
> possible).
>
> The stack size is 0x40, so you should be able to fit another 0x40 (64) bytes
> in gpr0, and most of the access bank will be available to use (C takes the
> beginning of it up for math variables/arguments).
>
> Your 20 variables (~40 bytes assuming they're all ints) and 5 arrays (4x10
> and 1x25) assuming all ints would be 130 bytes. Your chip should be able to
> accommodate these variables, plus the 64 byte stack, plus ~20 math
> variables. There's only a few bytes of memory left after all that.
>
>
> I would declare my variables something like this:
>
>
>
> //start code
>
> //Variables in ACCESS RAM must be declared with "near"
> #pragma udata access accessram
> near uint8_t var1;
> near uint8_t var2;
>
> //Variables in Banked RAM
> #pragma udata
> uint8_t buffer[MAX_LENGTH];
>
> //Variables in a special section of RAM that was declared in the linker file
> #pragma udata your_special_section
> uint8_t var;
>
> //end code
>
> -Scott
>   
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist