[cc65] Link Options and Atari Bank Switching...

From: Martin, Chris <cmartin1ti.com>
Date: 2004-03-04 01:38:44

I have a quick question about using the linker config file.  Please let me know if you have some ideas....

Here is what I have:

I have some code that uses the Atari 130XE bank switching to do some things.  In my link.cfg file, I have basically defined all code to be placed between the 0x8000 and 0xbc1f address space.  However, my code has grown to a point where it will no longer fit in this space.  

The Atari 130XE allows you to bank switch the address space from 0x4000-0x7fff, so initially I do not want to put any code here.

I would like to place code in the address spaces: 0x2800-0x3fff and 0x8000-0xbc1f.  I am not sure exactly how to break this up.

Here is my link.cfg file (more comments below):

    ZP: start = $82, size = $7E, type = rw, define = yes;
    HEADER: start = $0000, size = $6, file = %O;
    RAM28: start = $2800, size = $1800, file = %O;    
    RAM: start = $8000, size = $3c1f, file = %O;# $8E1F: matches up bound $BC1F
    EXEHDR: load = HEADER, type = wprot;
    CODE: load = RAM, type = wprot, define = yes;
    RODATA: load = RAM, type = wprot;
    DATA: load = RAM, type = rw;
    BSS: load = RAM, type = bss, define = yes;
    ZEROPAGE: load = ZP, type = zp;
    AUTOSTRT: load = RAM, type = wprot;
    CONDES: segment = RODATA,
     type = constructor,
     label = __CONSTRUCTOR_TABLE__,
     count = __CONSTRUCTOR_COUNT__;
    CONDES: segment = RODATA,
     type = destructor,
     label = __DESTRUCTOR_TABLE__,
     count = __DESTRUCTOR_COUNT__;
    __STACKSIZE__ = $200; # 512B stack (was 2K stack)

I have tried changing the DATA line to:
DATA: load = RAM28, type = rw;

This compiles, but when I load the code, the computer crashes.
Does anyone know why this would be?

Also, a related question: Is there a way to specify which structures are placed into which address space?  For example, say I want to use the 0x4000-0x7fff address space for code.  I would then want to place a piece of code to handle the bank switching outside of this address space.  But, how do I place one function at a certain location?

Thanks for the help, and sorry for the long post.

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Received on Thu Mar 4 01:39:18 2004

This archive was generated by hypermail 2.1.8 : 2004-03-04 01:39:24 CET