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