> You need to pay attention to the "presets" folder inside of the "ini" folder. The
> presets overwrite the settings of a mame.ini.
> If you want to change your defocus value, do it in the appropriate preset ini
> (raster, vector, lcd etc.).
> from the docs (hlsl.txt):
> ../ini/presets/raster.ini for raster screens
> ../ini/presets/vector.ini for color vector screens
> ../ini/presets/vector-mono.ini for monochrome vector screens (rename to vector.ini or
> ../ini/presets/lcd.ini for screens with TFT color LCD
> ../ini/presets/lcd-matrix.ini for screens with STN LCD matrix (rename to lcd.ini or
> ../ini/presets/gameboy.ini for Game Boy screen (same as lcd-matrix.ini with greenish
> color transformation)
> ../ini/presets/gba.ini for Game Boy Advance screen (same as lcd.ini)
> from the docs (config.txt):
> Enables or disables the reading of the config files. When enabled
> (which is the default), MAME reads the following config files in order:
> - mame.ini
> - .ini (i.e. if MAME was renamed mame060.exe, MAME
> parses mame060.ini here)
> - debug.ini (if the debugger is enabled)
> - .ini (based on the source filename of the driver)
> - vertical.ini (for games with vertical monitor orientation)
> - horizont.ini (for games with horizontal monitor orientation)
> - arcade.ini (for games in source added with GAME() macro)
> - console.ini (for games in source added with CONS() macro)
> - computer.ini (for games in source added with COMP() macro)
> - othersys.ini (for games in source added with SYST() macro)
> - vector.ini (for vector games only)
> - .ini (for clones only, may be called recursively)
> - .ini
> The settings in the later ini's override those in the earlier ini's.
> So, for example, if you wanted to disable overlay effects in the
> vector games, you can create a vector.ini with the "effect none" line
> in it, and it will override whatever effect value you have in your
> mame.ini. The default is ON (-readconfig).
> As you can read, the mame.ini is the first file in a order of ini files. Hope it
I wouldn't mess with the presets at all. You can put copies of the presets in ini (not ini/presets) and change the settings there. Then you can safely replace the original presets on updates.