osd-contiki/platform/apple2enh/linker.cfg
oliverschmidt 85edbc01db Starting with the cc65-snapshot-2.11.9.20080316 the Apple2 C-library supports placing code in the Apple2 Language Card by choosing the code segment 'HIGHCODE'. By default the memory area 0xD400 - 0xE000 is used for HIGHCODE. If the application doesn't need the ProDOS 8 QUIT code then the memory area used for HIGHCODE may be extended to 0xD000 - 0xE000.
Contiki now leverages that feature to place process.o, etimer.o and uip_arp.o in HIGHCODE. These files were carefully chosen as:
- they are necessary for all Ethernet apps
- their size doesn't depend on configuration macros
- they fill the available space nicely (with a little reserve for changes in the source or the compiler)
2008-03-24 22:49:00 +00:00

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2.2 KiB
INI

# This file should be identical to the file '<cc65>/doc/apple2.cfg' with the
# following exceptions:
# - Reduced stacksize: Contiki is designed to use extremely little stack.
# The applications coming with Contiki run even with a $100 byte stack.
# - Expanded RAM size: Allow applications to overlay BASIC.SYSTEM if needed.
# In that case the binary must be loaded with the ProDOS 8 loader available
# at: ftp://ftp.musoftware.de/pub/uz/cc65/contrib/loader-1.3.zip
# - Expanded LC size: Allow applications to overlay the ProDOS 8 QUIT code.
# In that case the binary must reboot on exit. There's a ProDOS 8 loader
# variant available at the URL above that does just this.
FEATURES {
STARTADDRESS: default = $0803;
}
MEMORY {
ZP: start = $0080, size = $001A, define = yes;
HEADER: start = $0000, size = $0004, file = %O;
RAM: start = %S, size = $BF00 - %S, file = %O, define = yes; # $BF00 instead of $9600
MOVE: start = $0000, size = $FFFF, file = %O, define = yes;
LC: start = $D000, size = $1000, define = yes; # $D000/$1000 instead of $D400/$0C00
}
SEGMENTS {
ZEROPAGE: load = ZP, type = zp;
EXEHDR: load = HEADER, type = ro;
STARTUP: load = RAM, type = ro;
LOWCODE: load = RAM, type = ro;
CODE: load = RAM, type = ro;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
INIT: load = MOVE, run = RAM, type = ro, define = yes;
HIGHCODE: load = MOVE, run = LC, type = ro, optional = yes;
}
FEATURES {
CONDES: segment = INIT,
type = constructor,
label = __CONSTRUCTOR_TABLE__,
count = __CONSTRUCTOR_COUNT__;
CONDES: segment = RODATA,
type = destructor,
label = __DESTRUCTOR_TABLE__,
count = __DESTRUCTOR_COUNT__;
CONDES: type = interruptor,
segment = RODATA,
label = __INTERRUPTOR_TABLE__,
count = __INTERRUPTOR_COUNT__;
}
SYMBOLS {
__STACKSIZE__ = $0200; # 1/2K instead of 2K stack
}