[cc65] linker cfg files

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From: 3843416 (carlosofcascade_at_gmx.net)
Date: 2003-04-20 17:11:25 

i have a problem with a specific linker config.
i want to display grafic on the screen, so i want to reserve memory for
the bitmap.
i want to reserve this 8000 bytes at the adress $2000. so i wrote
following linker cfg:

MEMORY {
 ZP: start = $02, size = $1A, type = rw;
 RAMLO: start = $07ff, size = $1800, define = yes, file = %O;
  BMP: start = $2000, size = $1f40, define = yes, file = %O;
  RAM: start = $3f3e, size = $4000, define = yes, file = %O;
}
SEGMENTS {
  BITMAP: load = BMP, type = bss;
  STARTUP: load = RAMLO, type = wprot;
  CODE: load = RAMLO, type = wprot;
  RODATA: load = RAMLO, type = wprot;
 DATA: load = RAM, type = rw;
 BSS: load = RAM, type = bss, define = yes;
 ZEROPAGE: load = ZP, type = zp;
}
FEATURES {
 CONDES: segment = RODATA,
  type = constructor,
  label = __CONSTRUCTOR_TABLE__,
  count = __CONSTRUCTOR_COUNT__;
 CONDES: segment = RODATA,
  type = destructor,
  label = __DESTRUCTOR_TABLE__,
  count = __DESTRUCTOR_COUNT__;
}
SYMBOLS {
 __STACKSIZE__ = $800; # 2K stack
}

then i used following assembly prg to reserve storage in the
BITMAP segment:

.segment "BITMAP"
.res 8000,0

the rest was done in c. i expect malloc to reserve storage in this
segment, so that the program crashes. yes, that is what it does.
without using this memory configuration the program ran already.


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