6502 Cross-Assembler "xa"

Info: Andre Fachat, [mail][Homepage]

"xa-2.0.7d.tar.gz" is a cross assembler for 6502 computers. I developed xa on my old Atari ST to make programms for my selfbuilt computer . After my Atari broke I ported it to Linux (ported? It compiled right out of the box!) and when I had to develop a programm for a friend of mine, I compiled it on an Amiga without errors. It will not run on a PC running DOS, as it needs quite an amount of memory to hold its internal tables.

2.0.7d now understands the #undef preprocessor directive.

With 2.0.7c, the include statements can now contain '\' or '/' as directory separator, and both are accepted (with DIRCHAR='/').

To compile, use the GNU C compiler gcc. Other compiler my warn about mixing K&R with ANSI style and the cr/lf line endings, instead of pure '\n', which is a single lf.

A small manual is in the archive, but you can also read it here.

Some of the features are:

• C-like Preprocessor to make macros
• label "hiding" on different levels, i.e. multiple use of the same label possible
• 1.5-pass assembler: Everything that can be derefenced is being assembled in pass 1 and saved in memory. The second pass does the rest. This (together with hashing etc) gives quite a good speed (30kByte binary out of 300kByte source in less than two minutes on an 8MHz Atari ST - hey, the first versions would have taken half an hour for this job!)
• needs no linker - all stuff is in source code (with this speed, it's ok)
• reads DOS and Unix(tm) files (LF or CR+LF)