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cc65 cfg-file has changed in the svn


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#1 karri OFFLINE  

karri

    Stargunner

  • 1,415 posts
  • Location:Espoo, Finland

Posted Tue Mar 22, 2011 11:52 PM

This is just a small note that the latest lynx.cfg changes may break some old projects.

What has happened is that I split up the executable header into 3 parts:

exehdr.s part that contains the lnx header for handy
bootldr.s that contains a new bootloader following Wookies ideas
defdir.s that contains a default directory.

Any of these parts can be replaced by your own code.

But in order to use these you need to modify the cfg files.

SYMBOLS {
    __STACKSIZE__: type = weak, value = $0800; # 2k stack
    __STARTOFDIRECTORY__: type = weak, value = $00DF; # start just after loader
    __BLOCKSIZE__: type = weak, value = 1024; # cart block size
    __EXEHDR__:    type = import;
    __BOOTLDR__:   type = import;
    __DEFDIR__:    type = import;
}
MEMORY {
    ZP:     file = "", define = yes, start = $0000, size = $0100;
    HEADER: file = %O,               start = $0000, size = $0040;
    BOOT:   file = %O,               start = $0200, size = __STARTOFDIRECTORY__;
    DIR:    file = %O,               start = $0000, size = 8;
    RAM:    file = %O, define = yes, start = $0200, size = $BE38 - __STACKSIZE__;
}
SEGMENTS {
    EXEHDR:   load = HEADER, type = ro;
    BOOTLDR:  load = BOOT,   type = ro;
    DIRECTORY:load = DIR,    type = ro;

If you leave out a line like
__DEFDIR__: type = import;

then you can create your own directory instead with whatever you want to put in the rom.

These "type = import" will drag in the cc65 compiler default code for various code segments.

So to create a BLL download compatible binary you can do this instead:

SYMBOLS {
    __STACKSIZE__: type = weak, value = $0800; # 2k stack
    __BLLHDR__:    type = import;
}
MEMORY {
    ZP:     file = "", define = yes, start = $0000, size = $0100;
    HEADER: file = %O,               start = $0000, size = $000a;
    RAM:    file = %O, define = yes, start = $0400, size = $BC38 - __STACKSIZE__;
}
SEGMENTS {
    BLLHDR:   load = HEADER, type = ro;

The new compiler includes 3 built-in cfg files already:
- normal dual-buffered -C lynx-cfg
- collision detection + dual-buffered -C lynx-coll.cfg
- downloadable BLL binary -C lynx-bll.cfg

--
Karri

Edited by karri, Tue Mar 22, 2011 11:55 PM.





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