Relocating PBP

[Charles Linquis]

I have been trying without success to relocate PBP so it will run in high memory.
I iniitially thought that an @ ORG 0x1000 at the beginning of the program might do the trick, but no.

It may be that PBP is not relocatable without major surgery, but I was wondering if anyone had successfully done this, and if so, how you did it.

[T.Jackson]

I have been trying without success to relocate PBP so it will run in high memory.
I iniitially thought that an @ ORG 0x1000 at the beginning of the program might do the trick, but no.

It may be that PBP is not relocatable without major surgery, but I was wondering if anyone had successfully done this, and if so, how you did it.

Kind of wondering why you would want to do that for. If it's because you're having problems compiling large programs, why don't you just use PBPW.exe that will swallow up as much memory as needed. I did a rather large burglar alarm project last year, had no choice but to use PBPW.

[Acetronics2]

Hi, Charles

For 12 to 17 series ... PbP libs. HAD to be in the 1st or Half 1st page ... could explain non relocatable code.

but, for the 18 Series with no more paging , I didn't see anything.

So, It certainly might be a good question for MeLabs ... ( didn't see anything in the FaQ ...)

That could allow Much Bigger Personnal libraries ...

Alain

[Charles Linquis]

I'm very close to the point where I can (and need to) write my own bootloader. I would like to write most of the program in PBP, so I need it to reside right at the top of memory. 18F8722 only.

[Acetronics2]

Did you try a "DEFINE LOADER_USED 1" ... to see in MPLAB prog window what it does ???

Alain

[Charles Linquis]

I ALWAYS use that define, because it is necessary if you use MCLoader. It appears to move the RESET vector up by 8 locations.

Below is a cut-and-paste from PBPP18.LIB



ifdef LOADER_USED
LIST
ORG RESET_ORG + 8 ; Make sure no library code in first 4 locs
NOLIST
endif

[Charles Linquis]

I might have found it - one of the first lines of PBPP18.lib is

If I change that line, it does relocate the code. Now I just have to test to see if it still runs.


ifndef RESET_ORG
RESET_ORG EQU 0
endif

[Darrel Taylor]

Instead of changing the library file, you can ....

DEFINE RESET_ORG xxxx

In your bootloader program.

That way it doesn't mess things up for your other programs.
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