I've updated the os-x alien plugin for powerpc and macintel, it is found on the usual sites via http://www.smalltalkconsulting.com/squeak.html in the Experimental directory as IA32ABI.1.1.0.bundle.zip The macintel flavour supports the ability to call foreign entry points with any type of data and the ability to callback to smalltalk code from the entered routine, plus the ability to get/set bytes, shorts, longs, float, and doubles. The powerpc flavour supports the ability to call foreign entry points with any type of data, and the ability to get/set bytes, shorts, longs, float, and doubles. Hopefully tomorrow I can look into the callback logic and propose some code/ assembler to enable that feature. It does btw run on 10.4 powerpc G3 machines now. There was a number of structural changes required enable the typeless Alien api to understand it must work with a floating point signature array that indicates how to deal with Float or Double data. I also added the ability to pass not only Alien and Integer data but also to pass Float/ Double objects as parm data. I note Squeak maintains floating point numbers as a Double. If you pass that as a Float by indicating that in the signature data (4 bytes versus 8 bytes) we convert the number from a double to a float before passing to the routine. On return the Alien api makes you explicitly indicate if the value is a double, integer, or float. Users should be aware it's possible to call a routine that returns a double but ask for a Float back. This might lead to unexpected numerical issues. Please ensure the size of the floating point value you want to return matches the function's actual return type. Lastly passing the wrong sized floating point values as parms (say a Float) versus an expected Double, will result in confused behaviour, or VM crashes as we are building the parm stack area based on information from the float signature array which must then match what the routine expects the stack to look like. -- = = = ======================================================================== John M. McIntosh <johnmci@smalltalkconsulting.com> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================