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Some fixes to the recent change.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4353 b7a2c559-68d2-44c3-8de9-860c34a00d81
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ol.sc 2009-10-10 11:11:25 +00:00
parent b7071c05a2
commit 6a72d53355
1 changed files with 8 additions and 7 deletions
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15
doc/apple2.sgml
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@ -44,9 +44,10 @@ that allows to put binary files with a DOS 3.3 header onto disk images
containing DOS 3.3 as well as ProDOS 8.
For ProDOS 8 system programs the load address is fixed to $2000 so there
is no need for a header. Therefore the linker configuration
is no need for a header. Thus the linker configuration
<htmlurl url="apple2-4.html#ss4.3" name="apple2-system.cfg"> for those programs
omits the DOS 3.3 header.
omits the DOS 3.3 header. The right AppleCommander option to put system files
without a header on a ProDOS 8 disk image is </-p/.
<sect>Memory layout<p>
@ -89,7 +90,7 @@ on the chosen <htmlurl url="apple2-4.html" name="linker configuration">.
The ld65 linker comes with a builtin config file for the Apple&nbsp;&rsqb;&lsqb;,
which is used via <tt/-t apple2/ (and displayed via <tt/--dump-config apple2/).
The apple2 package comes with additional secondary linker config files, which
are used via <tt/-C <configfile>/.
are used via <tt/-C &lt;configfile&gt;/.
<sect1>builtin config file<p>
@ -253,9 +254,9 @@ the memory from &dollar;800 to &dollar;2000 can be added to the heap by calling
ProDOS 8 requires for every open file a page-aligned 1 KB I/O buffer. By default
these buffers are allocated by the cc65 runtime system on the heap using
<tt/posix_memalign()/. While in general this is the best solution it means quite
<tt/posix_memalign()/. While this is generally the best solution it means quite
some overhead for (especially rather small) cc65 programs which do open files
but do not make use of the heap otherwise.
but don't make use of the heap otherwise.
The apple2 package comes with the alternative ProDOS 8 I/O buffer allocation
module <tt/apple2-iobuf-0800.o/ which uses the memory between &dollar;800 and
@ -265,8 +266,8 @@ concurrently open files.
While using <tt/_heapadd()/ as described in the section above together with the
default I/O buffer allocation basically yields the same placement of I/O buffers
the primary benefit of <tt/apple2-iobuf-0800.o/ is a reduction in code size -
and thus program file size - of more than 1400 bytes.
in memory the primary benefit of <tt/apple2-iobuf-0800.o/ is a reduction in code
size - and thus program file size - of more than 1400 bytes.
Using <tt/apple2-iobuf-0800.o/ is as simple as placing it on the linker command
line like this: