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Add small note about availability of the copydata library routine.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5965 b7a2c559-68d2-44c3-8de9-860c34a00d81
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uz 2013-01-19 17:12:42 +00:00
parent deb18b8e1e
commit 7dea2a98d9
1 changed files with 8 additions and 4 deletions
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doc/ld65.sgml
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@ -639,9 +639,9 @@ segment, than storing it into one of the ROMs, we have to put it there. But
unfortunately, ROM is not writable, so we have to copy it into RAM before unfortunately, ROM is not writable, so we have to copy it into RAM before
running the actual code. running the actual code.
The linker cannot help you copying the data from ROM into RAM (this must be The linker won't copy the data from ROM into RAM for you (this must be done by
done by the startup code of your program), but it has some features that will the startup code of your program), but it has some features that will help you
help you in this process. in this process.
First, you may not only specify a "<tt/load/" attribute for a segment, but First, you may not only specify a "<tt/load/" attribute for a segment, but
also a "<tt/run/" attribute. The "<tt/load/" attribute is mandatory, and, if also a "<tt/run/" attribute. The "<tt/load/" attribute is mandatory, and, if
@ -684,6 +684,10 @@ So, what your startup code must do, is to copy <tt/__DATA_SIZE__/ bytes from
All references to labels in the <tt/DATA/ segment are relocated to <tt/RAM2/ All references to labels in the <tt/DATA/ segment are relocated to <tt/RAM2/
by the linker, so things will work properly. by the linker, so things will work properly.
There's a library subroutine called <tt/copydata/ (in a module named
<tt/copydata.s/) that might be used to do actual copying. Be sure to have a
look at it's inner workings before using it!
<sect1>Other MEMORY area attributes<p> <sect1>Other MEMORY area attributes<p>
@ -939,7 +943,7 @@ The <tt/CONDES/ feature has several attributes:
This attribute defines a valid symbol name, that is added as an import This attribute defines a valid symbol name, that is added as an import
to the modules defining a constructor/desctructor of the given type. to the modules defining a constructor/desctructor of the given type.
This can be used to force linkage of a module if this module exports the This can be used to force linkage of a module if this module exports the
requested symbol. requested symbol.
</descrip> </descrip>