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## 2. Binary format

The standard binary file format generated by the linker for the Apple ][ target is a binary program with a 4 byte DOS 3.3 header containing the load address and load length. The default load address is $803.

AppleCommander 1.3.5 or later (available at http://applecommander.sourceforge.net/) includes the option `-cc65` 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. Thus the linker configuration apple2-system.cfg for those programs 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`.

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