ST7FLite29, memory location

delser9 · ‎2004-02-25

Posted on February 26, 2004 at 06:55

delser9 · ‎2004-02-25

Posted on February 26, 2004 at 06:22

Hello,

Can anybody tell me where I can find information about how to make a 'project.prm' file with Codewarrior? I'd like to know how the memory location is done. In the Codewarrior demo files I get something like:

__________________________________________

SECTIONS

Z_RAM = READ_WRITE 0x0080 TO 0x00FF;

RAM = READ_WRITE 0x0100 TO 0x017F;

ROM = READ_ONLY 0xE000 TO 0xFFDF;

PLACEMENT

DEFAULT_ROM, ROM_VAR, STRINGS INTO ROM;

_ZEROPAGE ,_OVERLAP INTO Z_RAM;

DEFAULT_RAM INTO RAM;

END

STACKTOP 0x1FF

____________________________________________

Can anybode tell me wher I can find information about what '_ZEROPAGE' or 'DEFAULT_RAM' means?

In my project, Codewarrior tells me that I have to many variables in the DEFAULT_RAM. Why don't I have acces to the memory from 0x0080 to 0x00FF. How can I use the full RAM space from 0x0080 to 0x01FF?

Thank you for help!

delser9 · ‎2004-02-25

Posted on February 26, 2004 at 06:55

I just found the solution. Maybe it helps somebody.

__________________________

PLACEMENT

DEFAULT_RAM INTO RAM, Z_RAM;

END

__________________________

The objects from section `DEFAULT_RAM' are allocated first in segment `RAM'. As soon as the segment `RAM' is full, allocation continues in section `Z_RAM'.