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Updated readme to show a command line generating an apple ][ binary and stuffing it in a disk image

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Rob McMullen 2017-05-02 21:41:41 -07:00
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@ -182,6 +182,39 @@ Extract all, renaming to lower case on the host file system::
extracting File #4 (.2.u.*) 162 COPY32 COM 056 -> copy32.com extracting File #4 (.2.u.*) 162 COPY32 COM 056 -> copy32.com
extracting File #5 (.2.u.*) 218 DISKFIX COM 057 -> diskfix.com extracting File #5 (.2.u.*) 218 DISKFIX COM 057 -> diskfix.com
Creating Binary Executables
---------------------------
The simple assembler included in ``atrcopy`` can create binary programs by
connecting binary data together in a single file and specifying a start address
so it can be executed by the system's binary run command.
The following command links together a hires image loaded at 2000 hex (the
first hires screen) and code at 6000 hex (that was assembled using an external
program, in this case the assembler from the cc65 project) and sets a start
address of 6000 hex. (Note that all the addresses are implicitly hex values.)
Because the Apple ][ binary format is limited to a single contiguous block of
data with a start address of the first byte of data loaded, atrcopy will fill
the gaps between any segments that aren't contiguous with zeros. If the start
address is not the first byte of the first specified segment, a mini-segment
will be included at the beginning that jumps to the specified ``brun`` address
(shown here as the segment from 1ffd - 2000). Note the gap between 4000 and
6000 hex will be filled with zeros::
$ atrcopy game.dsk asm -b title.bin@2000 game[4:]@6000 --brun 6000 -f -o GAME
game.dsk: DOS 3.3 Disk Image (size=143360 (560x256b)
setting data for 1ffd - 2000 at index 0004
setting data for 2000 - 4000 at index 0007
setting data for 6000 - 6ef3 at index 4007
copying GAME to DOS 3.3 Disk Image (size=143360 (560x256b)
It is also possible to assemble text files that use the MAC/65 syntax, because
support for `pyatasm <https://pypi.python.org/pypi/pyatasm>`_ is built-in (but
optional). MAC/65 is a macro assembler originally designed for the Atari 8-bit
machines but since it produces 6502 code it can be used to compile for any
machine that uses the 6502: Apple, Commodore, etc.
Example on Mac OS X Example on Mac OS X
------------------- -------------------