Our website received a big facelift, please check it out at https://rgbds.gbdev.io! Thanks to @ISSOtm and @avivace for the work on this. While some pages have been moved around, all URLs under /docs have been preserved.

Deprecated:

• m: MACRO syntax; use MACRO m.
• __FILE__ and __LINE__.
• rgbasm -h and -L will soon become the default behavior; please use rgbasm -H and -l respectively to opt into the current behavior.
• rgbgfx -h has been renamed to the less confusing rgbgfx -Z.

Added:

• RGBGFX has been massively overhauled! Please check out the new docs for full details, but notably:
• The alpha channel is now handled in a sensible and useful way.
• Palettes can be manually specified without having to muck with PNG embedded palettes using -c!
• rgbgfx -r can also "reverse" the process and generate a PNG from the binary data.
• "At-files" allow storing the flags e.g. next to the image, instead of centralized within your Makefile/build script.
• State-of-the-art packing algorithm ensures optimal palette generation :sunglasses:
• Special thanks to @aaaaaa123456789 for randtilegen, used for testing; @eievui5, @MarkSixtyFour, and @Rangi42 for review and testing!
• There's an egg somewhere in there?
• Unsigned right shift operator >>>!
• Binary AND & can now be constant if applied to a symbol with the right alignment.
• rgbasm -Q or OPT Q configures the fixed-point precision, which is still 16 by default (e.g. -Q8 uses Q24.8).
• FMOD function for fixed-point modulo.
• Precise fixed-point literals like 12.34q8 override the current Q option value.
• Fixed-point functions take an optional final argument to specify their precision, overriding the current -Q option.
• @ and _NARG are considered undefined (e.g. by DEF) when they have no value.
• rgbasm -P allows automatically pre-including a file before the source file; for example, to define constants used throughout the codebase.
• SECTION(symbol) evaluates to the name of symbol's section.
• rgbasm -r sets the maximum recursion depth, not the minimum failure depth (off by one).
• OPT r.
• -Wunmapped-char=0/1/2 warning for characters not in the charmap. Level 1 ignores unmapped characters in a non-default charmap if it's empty, level 2 does not.
• \@ only increments its expanded value when used, so merely adding or removing MACRO, REPT, or FOR blocks will not affect generated symbols.
• RGBASM will warn if a command-line argument overrides a previous one, for example -o.
• RGBLINK is able to link SDCC object files.
• RGBLINK will now report floating sections' names when using -O.
• RGBLINK will omit symbol names from the .map file when using -M.
• RGBLINK will not output anonymous labels in the .sym file, to comply with the spec.
• RGBLINK will report EMPTY space between sections in the .map file, and total used+empty space at the end.
• A .clang-format, though it it only applied to C++ files; we are gradually transitioning away from checkpatch style.

Removed:

• PRINTT, PRINTI, PRINTV, PRINTF (use PRINT/PRINTLN instead)
• _PI
• SET as an assignment operator (use = instead)
• rgbgfx -D, -f, and -F were not useful anymore

Changed:

• RGBASM trigonometry functions now divide a circle into 1.0 turns, not 65536.0 so-called "binary degrees".
• Please prefer rgbasm -I over rgbasm -i, for consistency with other tools (mainly C compilers); -i will be phased out in a future release.
• man pages are now all in a single directory; this affects the release tarballs!
• .map files now have a more useful free/used space summary at the end
• .map files are now indented using tabs (requested in #1012)

Fixed:

• rgblink -S rejected a lot of valid arguments.
• rgblink -O could "forget" ROM0 if no such sections were defined, offsetting the entire file.
• Whitespace is now trimmed in macro arguments, even after line continuations.
• All *UTC* symbols could contain local time instead on some systems.
• contrib/gbdiff.bash correctly handles spaces in its arguments (oops)
• Version number will always be properly updated when building with CMake.
• RGBASM now warns when specifying options that override eachother.
• rgbasm -b and -g were broken.
• Tests did not pass on the release tarballs.
• Math symbols could render incorrectly in rgbasm(5).
• RGBDS should be portable to more systems now.
• RGBASM has been optimized slightly yet again.
• Rephrased some documentation for clarity.