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Adds documentation and a sample config file for the ATARI format.

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Daniel Serpell 2018-12-01 21:45:22 -03:00
parent 2aa5b4cafe
commit e767c8990d
3 changed files with 60 additions and 2 deletions
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24
cfg/atari-xex.cfg Normal file
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@ -0,0 +1,24 @@
FEATURES {
STARTADDRESS: default = $2E00;
}
SYMBOLS {
__STARTADDRESS__: type = export, value = %S;
}
MEMORY {
ZP: file = "", define = yes, start = $0082, size = $007E;
MAIN: file = %O, define = yes, start = %S, size = $BC20 - %S;
}
FILES {
%O: format = atari;
}
FORMATS {
atari: runad = start;
}
SEGMENTS {
ZEROPAGE: load = ZP, type = zp, optional = yes;
EXTZP: load = ZP, type = zp, optional = yes; # to enable modules to be able to link to C and assembler programs
CODE: load = MAIN, type = rw, define = yes;
RODATA: load = MAIN, type = ro optional = yes;
DATA: load = MAIN, type = rw optional = yes;
BSS: load = MAIN, type = bss, optional = yes, define = yes;
}

12
doc/atari.sgml
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@ -203,6 +203,18 @@ is <it/left out/, keep this in mind.
The values you assign to the two symbols <tt/__AUTOSTART__/ and <tt/__EXEHDR__/
don't matter.
<sect2><tt/atari-xex.cfg/<p>
This config file allows writing multi segment binaries easily, without having to
write the header explicitly on each segment.
It is similar to the <tt/atari-asm.cfg/ above, but uses the ATARI (xex) file
format support on LD65 instead of the standard binary output, so it does not
have the <tt/__AUTOSTART/ nor the <tt/__EXEHDR__/ symbols.
Note that each <tt/MEMORY/ area in the configuration file will have it's own
segment in the output file with the correct headers.
<sect2><tt/atari-cart.cfg/<p>
This config file can be used to create 8K or 16K cartridges. It's suited both

26
doc/ld65.sgml
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@ -894,7 +894,7 @@ look like this:
}
</verb></tscreen>
The only other available output format is the o65 format specified by Andre
There are two other available formats, one is the o65 format specified by Andre
Fachat (see the <url url="http://www.6502.org/users/andre/o65/fileformat.html"
name="6502 binary relocation format specification">). It is defined like this:
@ -904,7 +904,20 @@ name="6502 binary relocation format specification">). It is defined like this:
}
</verb></tscreen>
The necessary o65 attributes are defined in a special section labeled
The other format available is the Atari (xex) segmented file format, this is
the standard format used by Atari DOS 2.0 and upward file managers in the Atari
8-bit computers, and it is defined like this:
<tscreen><verb>
FILES {
%O: format = atari;
}
</verb></tscreen>
In the Atari segmented file format, the linker will write each <tt/MEMORY/ area
as a new segment, including a header with the start and end address.
The necessary o65 or Atari attributes are defined in a special section labeled
<ref id="FORMAT" name="FORMAT">.
@ -925,6 +938,15 @@ has several attributes that may be defined here.
}
</verb></tscreen>
The Atari file format has only one attribute, <tt/RUNAD/ that allows to specify
a symbol as the run address of the binary. If the attribute is omiteed, no run
address is specified.
<tscreen><verb>
FORMATS {
atari: runad = _start;
}
</verb></tscreen>
<sect1>The FEATURES section<label id="FEATURES"><p>